...

31 files changed, 2257 insertions, 24 deletions

diff --git a/FrontEnd/src/App.tsx b/FrontEnd/src/App.tsx
index f638f5e8..ca3e4d38 100644
--- a/FrontEnd/src/App.tsx
+++ b/FrontEnd/src/App.tsx
@@ -1,27 +1,26 @@
-import * as React from "react";
+import { Suspense } from "react";
 import { BrowserRouter, Route, Routes } from "react-router-dom";
 
 import AppBar from "./views/common/AppBar";
 import NotFoundPage from "./pages/404";
-import LoadingPage from "./views/common/LoadingPage";
+import HomePage from "./pages/home";
 import AboutPage from "./pages/about";
 import SettingPage from "./pages/setting";
-import Center from "./views/center";
 import LoginPage from "./pages/login";
 import RegisterPage from "./pages/register";
-import TimelinePage from "./views/timeline";
+import TimelinePage from "./pages/timeline";
+import LoadingPage from "./pages/loading";
 import Search from "./views/search";
 import Admin from "./views/admin";
 import AlertHost from "./views/common/alert/AlertHost";
 
 export default function App() {
   return (
-    <React.Suspense fallback={<LoadingPage />}>
+    <Suspense fallback={<LoadingPage />}>
       <BrowserRouter>
         <AppBar />
         <div style={{ height: 56 }} />
         <Routes>
-          <Route path="center" element={<Center />} />
           <Route path="login" element={<LoginPage />} />
           <Route path="register" element={<RegisterPage />} />
           <Route path="settings" element={<SettingPage />} />
@@ -30,10 +29,11 @@ export default function App() {
           <Route path="admin/*" element={<Admin />} />
           <Route path=":owner" element={<TimelinePage />} />
           <Route path=":owner/:timeline" element={<TimelinePage />} />
+          <Route path="" element={<HomePage />} />
           <Route path="*" element={<NotFoundPage />} />
         </Routes>
         <AlertHost />
       </BrowserRouter>
-    </React.Suspense>
+    </Suspense>
   );
 }
diff --git a/FrontEnd/src/pages/home/index.css b/FrontEnd/src/pages/home/index.css
new file mode 100644
index 00000000..bc72a182
--- /dev/null
+++ b/FrontEnd/src/pages/home/index.css
@@ -0,0 +1,7 @@
+.home-page {
+  width: 100%;
+  text-align: center;
+  padding-top: 1em;
+  font-size: 2em;
+  color: var(--cru-primary-color);
+}
\ No newline at end of file
diff --git a/FrontEnd/src/pages/home/index.tsx b/FrontEnd/src/pages/home/index.tsx
new file mode 100644
index 00000000..76a3d18c
--- /dev/null
+++ b/FrontEnd/src/pages/home/index.tsx
@@ -0,0 +1,7 @@
+import "./index.css";
+
+export default function HomePage() {
+  return (
+    <div className="home-page">Be patient! I&apos;m working on this...</div>
+  );
+}
diff --git a/FrontEnd/src/pages/loading/index.css b/FrontEnd/src/pages/loading/index.css
new file mode 100644
index 00000000..08e43c22
--- /dev/null
+++ b/FrontEnd/src/pages/loading/index.css
@@ -0,0 +1,7 @@
+.loading-page {
+  width: 100%;
+  text-align: center;
+  padding-top: 1em;
+  font-size: 2em;
+  color: var(--cru-primary-color);
+}
\ No newline at end of file
diff --git a/FrontEnd/src/pages/loading/index.tsx b/FrontEnd/src/pages/loading/index.tsx
new file mode 100644
index 00000000..e4c8edab
--- /dev/null
+++ b/FrontEnd/src/pages/loading/index.tsx
@@ -0,0 +1,11 @@
+import Spinner from "@/views/common/Spinner";
+
+import "./index.css";
+
+export default function LoadingPage() {
+  return (
+    <div className="loading-page">
+      <Spinner />
+    </div>
+  );
+}
diff --git a/FrontEnd/src/pages/timeline/CollapseButton.tsx b/FrontEnd/src/pages/timeline/CollapseButton.tsx
new file mode 100644
index 00000000..8270e160
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/CollapseButton.tsx
@@ -0,0 +1,21 @@
+import * as React from "react";
+
+import IconButton from "@/views/common/button/IconButton";
+
+const CollapseButton: React.FC<{
+  collapse: boolean;
+  onClick: () => void;
+  className?: string;
+  style?: React.CSSProperties;
+}> = ({ collapse, onClick, className, style }) => {
+  return (
+    <IconButton
+      icon={collapse ? "arrows-angle-expand" : "arrows-angle-contract"}
+      onClick={onClick}
+      className={className}
+      style={style}
+    />
+  );
+};
+
+export default CollapseButton;
diff --git a/FrontEnd/src/pages/timeline/ConnectionStatusBadge.css b/FrontEnd/src/pages/timeline/ConnectionStatusBadge.css
new file mode 100644
index 00000000..7fe83b9b
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/ConnectionStatusBadge.css
@@ -0,0 +1,36 @@
+.connection-status-badge {

+  font-size: 0.8em;

+  border-radius: 5px;

+  padding: 0.1em 1em;

+  background-color: #eaf2ff;

+}

+.connection-status-badge::before {

+  width: 10px;

+  height: 10px;

+  border-radius: 50%;

+  display: inline-block;

+  content: "";

+  margin-right: 0.6em;

+}

+.connection-status-badge.success {

+  color: #006100;

+}

+.connection-status-badge.success::before {

+  background-color: #006100;

+}

+

+.connection-status-badge.warning {

+  color: #e4a700;

+}

+

+.connection-status-badge.warning::before {

+  background-color: #e4a700;

+}

+

+.connection-status-badge.danger {

+  color: #fd1616;

+}

+

+.connection-status-badge.danger::before {

+  background-color: #fd1616;

+}

diff --git a/FrontEnd/src/pages/timeline/ConnectionStatusBadge.tsx b/FrontEnd/src/pages/timeline/ConnectionStatusBadge.tsx
new file mode 100644
index 00000000..2b820454
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/ConnectionStatusBadge.tsx
@@ -0,0 +1,41 @@
+import * as React from "react";
+import classnames from "classnames";
+import { HubConnectionState } from "@microsoft/signalr";
+import { useTranslation } from "react-i18next";
+
+import "./ConnectionStatusBadge.css";
+
+export interface ConnectionStatusBadgeProps {
+  status: HubConnectionState;
+  className?: string;
+  style?: React.CSSProperties;
+}
+
+const classNameMap: Record<HubConnectionState, string> = {
+  Connected: "success",
+  Connecting: "warning",
+  Disconnected: "danger",
+  Disconnecting: "warning",
+  Reconnecting: "warning",
+};
+
+const ConnectionStatusBadge: React.FC<ConnectionStatusBadgeProps> = (props) => {
+  const { status, className, style } = props;
+
+  const { t } = useTranslation();
+
+  return (
+    <div
+      className={classnames(
+        "connection-status-badge",
+        classNameMap[status],
+        className
+      )}
+      style={style}
+    >
+      {t(`connectionState.${status}`)}
+    </div>
+  );
+};
+
+export default ConnectionStatusBadge;
diff --git a/FrontEnd/src/pages/timeline/MarkdownPostEdit.css b/FrontEnd/src/pages/timeline/MarkdownPostEdit.css
new file mode 100644
index 00000000..e36be992
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/MarkdownPostEdit.css
@@ -0,0 +1,21 @@
+.timeline-markdown-post-edit-page {

+  overflow: auto;

+  max-height: 300px;

+}

+

+.timeline-markdown-post-edit-image-container {

+  position: relative;

+  text-align: center;

+  margin-bottom: 1em;

+}

+

+.timeline-markdown-post-edit-image {

+  max-width: 100%;

+  max-height: 200px;

+}

+

+.timeline-markdown-post-edit-image-delete-button {

+  position: absolute;

+  right: 10px;

+  top: 2px;

+}

diff --git a/FrontEnd/src/pages/timeline/MarkdownPostEdit.tsx b/FrontEnd/src/pages/timeline/MarkdownPostEdit.tsx
new file mode 100644
index 00000000..9c497108
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/MarkdownPostEdit.tsx
@@ -0,0 +1,215 @@
+import * as React from "react";
+import classnames from "classnames";
+import { useTranslation } from "react-i18next";
+
+import { getHttpTimelineClient, HttpTimelinePostInfo } from "@/http/timeline";
+
+import TimelinePostBuilder from "@/services/TimelinePostBuilder";
+
+import FlatButton from "@/views/common/button/FlatButton";
+import TabPages from "@/views/common/tab/TabPages";
+import ConfirmDialog from "@/views/common/dialog/ConfirmDialog";
+import Spinner from "@/views/common/Spinner";
+import IconButton from "@/views/common/button/IconButton";
+
+import "./MarkdownPostEdit.css";
+
+export interface MarkdownPostEditProps {
+  owner: string;
+  timeline: string;
+  onPosted: (post: HttpTimelinePostInfo) => void;
+  onPostError: () => void;
+  onClose: () => void;
+  className?: string;
+  style?: React.CSSProperties;
+}
+
+const MarkdownPostEdit: React.FC<MarkdownPostEditProps> = ({
+  owner: ownerUsername,
+  timeline: timelineName,
+  onPosted,
+  onClose,
+  onPostError,
+  className,
+  style,
+}) => {
+  const { t } = useTranslation();
+
+  const [canLeave, setCanLeave] = React.useState<boolean>(true);
+
+  const [process, setProcess] = React.useState<boolean>(false);
+
+  const [showLeaveConfirmDialog, setShowLeaveConfirmDialog] =
+    React.useState<boolean>(false);
+
+  const [text, _setText] = React.useState<string>("");
+  const [images, _setImages] = React.useState<{ file: File; url: string }[]>(
+    []
+  );
+  const [previewHtml, _setPreviewHtml] = React.useState<string>("");
+
+  const _builder = React.useRef<TimelinePostBuilder | null>(null);
+
+  const getBuilder = (): TimelinePostBuilder => {
+    if (_builder.current == null) {
+      const builder = new TimelinePostBuilder(() => {
+        setCanLeave(builder.isEmpty);
+        _setText(builder.text);
+        _setImages(builder.images);
+        _setPreviewHtml(builder.renderHtml());
+      });
+      _builder.current = builder;
+    }
+    return _builder.current;
+  };
+
+  const canSend = text.length > 0;
+
+  React.useEffect(() => {
+    return () => {
+      getBuilder().dispose();
+    };
+  }, []);
+
+  React.useEffect(() => {
+    window.onbeforeunload = (): unknown => {
+      if (!canLeave) {
+        return t("timeline.confirmLeave");
+      }
+    };
+
+    return () => {
+      window.onbeforeunload = null;
+    };
+  }, [canLeave, t]);
+
+  const send = async (): Promise<void> => {
+    setProcess(true);
+    try {
+      const dataList = await getBuilder().build();
+      const post = await getHttpTimelineClient().postPost(
+        ownerUsername,
+        timelineName,
+        {
+          dataList,
+        }
+      );
+      onPosted(post);
+      onClose();
+    } catch (e) {
+      setProcess(false);
+      onPostError();
+    }
+  };
+
+  return (
+    <>
+      <TabPages
+        className={className}
+        style={style}
+        pageContainerClassName="py-2"
+        dense
+        actions={
+          process ? (
+            <Spinner />
+          ) : (
+            <div>
+              <IconButton
+                icon="x"
+                color="danger"
+                large
+                className="cru-align-middle me-2"
+                onClick={() => {
+                  if (canLeave) {
+                    onClose();
+                  } else {
+                    setShowLeaveConfirmDialog(true);
+                  }
+                }}
+              />
+              {canSend && (
+                <FlatButton text="timeline.send" onClick={() => void send()} />
+              )}
+            </div>
+          )
+        }
+        pages={[
+          {
+            name: "text",
+            text: "edit",
+            page: (
+              <textarea
+                value={text}
+                disabled={process}
+                className="cru-fill-parent"
+                onChange={(event) => {
+                  getBuilder().setMarkdownText(event.currentTarget.value);
+                }}
+              />
+            ),
+          },
+          {
+            name: "images",
+            text: "image",
+            page: (
+              <div className="timeline-markdown-post-edit-page">
+                {images.map((image, index) => (
+                  <div
+                    key={image.url}
+                    className="timeline-markdown-post-edit-image-container"
+                  >
+                    <img
+                      src={image.url}
+                      className="timeline-markdown-post-edit-image"
+                    />
+                    <IconButton
+                      icon="trash"
+                      color="danger"
+                      className={classnames(
+                        "timeline-markdown-post-edit-image-delete-button",
+                        process && "d-none"
+                      )}
+                      onClick={() => {
+                        getBuilder().deleteImage(index);
+                      }}
+                    />
+                  </div>
+                ))}
+                <input
+                  type="file"
+                  accept="image/jpeg,image/jpg,image/png,image/gif,image/webp"
+                  onChange={(event: React.ChangeEvent<HTMLInputElement>) => {
+                    const { files } = event.currentTarget;
+                    if (files != null && files.length !== 0) {
+                      getBuilder().appendImage(files[0]);
+                    }
+                  }}
+                  disabled={process}
+                />
+              </div>
+            ),
+          },
+          {
+            name: "preview",
+            text: "preview",
+            page: (
+              <div
+                className="markdown-container timeline-markdown-post-edit-page"
+                dangerouslySetInnerHTML={{ __html: previewHtml }}
+              />
+            ),
+          },
+        ]}
+      />
+      <ConfirmDialog
+        onClose={() => setShowLeaveConfirmDialog(false)}
+        onConfirm={onClose}
+        open={showLeaveConfirmDialog}
+        title="timeline.dropDraft"
+        body="timeline.confirmLeave"
+      />
+    </>
+  );
+};
+
+export default MarkdownPostEdit;
diff --git a/FrontEnd/src/pages/timeline/Timeline.css b/FrontEnd/src/pages/timeline/Timeline.css
new file mode 100644
index 00000000..4dd4fdcc
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/Timeline.css
@@ -0,0 +1,244 @@
+.timeline {
+  z-index: 0;
+  position: relative;
+  width: 100%;
+}
+
+@keyframes timeline-line-node {
+  to {
+    box-shadow: 0 0 20px 3px var(--cru-primary-l1-color);
+  }
+}
+
+@keyframes timeline-line-node-current {
+  to {
+    box-shadow: 0 0 20px 3px var(--cru-primary-enhance-l1-color);
+  }
+}
+
+@keyframes timeline-line-node-loading {
+  to {
+    box-shadow: 0 0 20px 3px var(--cru-primary-l1-color);
+  }
+}
+
+@keyframes timeline-line-node-loading-edge {
+  from {
+    transform: rotate(0turn);
+  }
+  to {
+    transform: rotate(1turn);
+  }
+}
+
+@keyframes timeline-top-loading-enter {
+  from {
+    transform: translate(0, -100%);
+  }
+}
+
+@keyframes timeline-post-enter {
+  from {
+    transform: translate(0, 100%);
+    opacity: 0;
+  }
+  to {
+    opacity: 1;
+  }
+}
+
+.timeline-top-loading-enter {
+  animation: 1s timeline-top-loading-enter;
+}
+
+.timeline-line {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  width: 30px;
+  position: absolute;
+  z-index: 1;
+  left: 2em;
+  top: 0;
+  bottom: 0;
+  transition: left 0.5s;
+}
+
+@media (max-width: 575.98px) {
+  .timeline-line {
+    left: 1em;
+  }
+}
+
+.timeline-line .segment {
+  width: 7px;
+  background: var(--cru-primary-color);
+}
+.timeline-line .segment.start {
+  height: 1.8em;
+  flex: 0 0 auto;
+}
+.timeline-line .segment.end {
+  flex: 1 1 auto;
+}
+.timeline-line .segment.current-end {
+  height: 2em;
+  flex: 0 0 auto;
+  background: linear-gradient(var(--cru-primary-enhance-color), white);
+}
+.timeline-line .node-container {
+  flex: 0 0 auto;
+  position: relative;
+  width: 18px;
+  height: 18px;
+}
+.timeline-line .node {
+  width: 20px;
+  height: 20px;
+  position: absolute;
+  background: var(--cru-primary-color);
+  left: -1px;
+  top: -1px;
+  border-radius: 50%;
+  box-sizing: border-box;
+  z-index: 1;
+  animation: 1s infinite alternate;
+  animation-name: timeline-line-node;
+}
+.timeline-line .node-loading-edge {
+  color: var(--cru-primary-color);
+  width: 38px;
+  height: 38px;
+  position: absolute;
+  left: -10px;
+  top: -10px;
+  box-sizing: border-box;
+  z-index: 2;
+  animation: 1.5s linear infinite timeline-line-node-loading-edge;
+}
+.timeline-line.current .segment.start {
+  background: linear-gradient(
+    var(--cru-primary-color),
+    var(--cru-primary-enhance-color)
+  );
+}
+
+.timeline-line.current .segment.end {
+  background: var(--cru-primary-enhance-color);
+}
+
+.timeline-line.current .node {
+  background: var(--cru-primary-enhance-color);
+  animation-name: timeline-line-node-current;
+}
+
+.timeline-line.loading .node {
+  background: var(--cru-primary-color);
+  animation-name: timeline-line-node-loading;
+}
+
+.timeline-item {
+  position: relative;
+  padding: 0.5em;
+}
+
+.timeline-item-card {
+  position: relative;
+  padding: 0.5em 0.5em 0.5em 4em;
+}
+
+.timeline-item-card.enter-animation {
+  animation: 0.6s forwards;
+  opacity: 0;
+}
+
+@media (max-width: 575.98px) {
+  .timeline-item-card {
+    padding-left: 3em;
+  }
+}
+
+.timeline-item-header {
+  display: flex;
+  align-items: center;
+}
+
+.timeline-avatar {
+  border-radius: 50%;
+  width: 2em;
+  height: 2em;
+}
+
+.timeline-item-delete-button {
+  position: absolute;
+  right: 0;
+  bottom: 0;
+}
+
+.timeline-content {
+  white-space: pre-line;
+}
+
+.timeline-content-image {
+  max-width: 80%;
+  max-height: 200px;
+}
+
+.timeline-date-item {
+  position: relative;
+  padding: 0.3em 0 0.3em 4em;
+}
+
+.timeline-date-item-badge {
+  display: inline-block;
+  padding: 0.1em 0.4em;
+  border-radius: 0.4em;
+  background: #7c7c7c;
+  color: white;
+  font-size: 0.8em;
+}
+
+.timeline-post-item-options-mask {
+  background: rgba(255, 255, 255, 0.85);
+  z-index: 100;
+  position: absolute;
+  left: 0;
+  right: 0;
+  top: 0;
+  bottom: 0;
+
+  display: flex;
+  justify-content: space-around;
+  align-items: center;
+
+  border-radius: var(--cru-card-border-radius);
+}
+
+.timeline-sync-state-badge {
+  font-size: 0.8em;
+  padding: 3px 8px;
+  border-radius: 5px;
+  background: #e8fbff;
+}
+
+.timeline-sync-state-badge-pin {
+  display: inline-block;
+  width: 0.4em;
+  height: 0.4em;
+  border-radius: 50%;
+  vertical-align: middle;
+  margin-right: 0.6em;
+}
+
+.timeline-card {
+  position: fixed;
+  z-index: 1029;
+  top: 56px;
+  right: 0;
+  margin: 0.5em;
+}
+
+.timeline-top {
+  position: sticky;
+  top: 56px;
+}
diff --git a/FrontEnd/src/pages/timeline/Timeline.tsx b/FrontEnd/src/pages/timeline/Timeline.tsx
new file mode 100644
index 00000000..3a7fbd00
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/Timeline.tsx
@@ -0,0 +1,207 @@
+import * as React from "react";
+import classnames from "classnames";
+import { useScrollToBottom } from "@/utilities/hooks";
+import { HubConnectionState } from "@microsoft/signalr";
+
+import {
+  HttpForbiddenError,
+  HttpNetworkError,
+  HttpNotFoundError,
+} from "@/http/common";
+import {
+  getHttpTimelineClient,
+  HttpTimelineInfo,
+  HttpTimelinePostInfo,
+} from "@/http/timeline";
+
+import { useUser } from "@/services/user";
+import { getTimelinePostUpdate$ } from "@/services/timeline";
+
+import TimelinePostListView from "./TimelinePostListView";
+import TimelineEmptyItem from "./TimelineEmptyItem";
+import TimelineLoading from "./TimelineLoading";
+import TimelinePostEdit from "./TimelinePostEdit";
+import TimelinePostEditNoLogin from "./TimelinePostEditNoLogin";
+import TimelineCard from "./TimelineCard";
+
+import "./Timeline.css";
+
+export interface TimelineProps {
+  className?: string;
+  style?: React.CSSProperties;
+  timelineOwner: string;
+  timelineName: string;
+}
+
+const Timeline: React.FC<TimelineProps> = (props) => {
+  const { timelineOwner, timelineName, className, style } = props;
+
+  const user = useUser();
+
+  const [timeline, setTimeline] = React.useState<HttpTimelineInfo | null>(null);
+  const [posts, setPosts] = React.useState<HttpTimelinePostInfo[] | null>(null);
+  const [signalrState, setSignalrState] = React.useState<HubConnectionState>(
+    HubConnectionState.Connecting
+  );
+  const [error, setError] = React.useState<
+    "offline" | "forbid" | "notfound" | "error" | null
+  >(null);
+
+  const [currentPage, setCurrentPage] = React.useState(1);
+  const [totalPage, setTotalPage] = React.useState(0);
+
+  const [timelineReloadKey, setTimelineReloadKey] = React.useState(0);
+  const [postsReloadKey, setPostsReloadKey] = React.useState(0);
+
+  const updateTimeline = (): void => setTimelineReloadKey((o) => o + 1);
+  const updatePosts = (): void => setPostsReloadKey((o) => o + 1);
+
+  React.useEffect(() => {
+    setTimeline(null);
+    setPosts(null);
+    setError(null);
+    setSignalrState(HubConnectionState.Connecting);
+  }, [timelineOwner, timelineName]);
+
+  React.useEffect(() => {
+    getHttpTimelineClient()
+      .getTimeline(timelineOwner, timelineName)
+      .then(
+        (t) => {
+          setTimeline(t);
+        },
+        (error) => {
+          if (error instanceof HttpNetworkError) {
+            setError("offline");
+          } else if (error instanceof HttpForbiddenError) {
+            setError("forbid");
+          } else if (error instanceof HttpNotFoundError) {
+            setError("notfound");
+          } else {
+            console.error(error);
+            setError("error");
+          }
+        }
+      );
+  }, [timelineOwner, timelineName, timelineReloadKey]);
+
+  React.useEffect(() => {
+    getHttpTimelineClient()
+      .listPost(timelineOwner, timelineName, 1)
+      .then(
+        (page) => {
+          setPosts(
+            page.items.filter((p): p is HttpTimelinePostInfo => !p.deleted)
+          );
+          setTotalPage(page.totalPageCount);
+        },
+        (error) => {
+          if (error instanceof HttpNetworkError) {
+            setError("offline");
+          } else if (error instanceof HttpForbiddenError) {
+            setError("forbid");
+          } else if (error instanceof HttpNotFoundError) {
+            setError("notfound");
+          } else {
+            console.error(error);
+            setError("error");
+          }
+        }
+      );
+  }, [timelineOwner, timelineName, postsReloadKey]);
+
+  React.useEffect(() => {
+    const timelinePostUpdate$ = getTimelinePostUpdate$(
+      timelineOwner,
+      timelineName
+    );
+    const subscription = timelinePostUpdate$.subscribe(({ update, state }) => {
+      if (update) {
+        setPostsReloadKey((o) => o + 1);
+      }
+      setSignalrState(state);
+    });
+    return () => {
+      subscription.unsubscribe();
+    };
+  }, [timelineOwner, timelineName]);
+
+  useScrollToBottom(() => {
+    console.log(`Load page ${currentPage + 1}.`);
+    setCurrentPage(currentPage + 1);
+    void getHttpTimelineClient()
+      .listPost(timelineOwner, timelineName, currentPage + 1)
+      .then(
+        (page) => {
+          const ps = page.items.filter(
+            (p): p is HttpTimelinePostInfo => !p.deleted
+          );
+          setPosts((old) => [...(old ?? []), ...ps]);
+        },
+        (error) => {
+          if (error instanceof HttpNetworkError) {
+            setError("offline");
+          } else if (error instanceof HttpForbiddenError) {
+            setError("forbid");
+          } else if (error instanceof HttpNotFoundError) {
+            setError("notfound");
+          } else {
+            console.error(error);
+            setError("error");
+          }
+        }
+      );
+  }, currentPage < totalPage);
+
+  if (error === "offline") {
+    return (
+      <div className={className} style={style}>
+        Offline.
+      </div>
+    );
+  } else if (error === "notfound") {
+    return (
+      <div className={className} style={style}>
+        Not exist.
+      </div>
+    );
+  } else if (error === "forbid") {
+    return (
+      <div className={className} style={style}>
+        Forbid.
+      </div>
+    );
+  } else if (error === "error") {
+    return (
+      <div className={className} style={style}>
+        Error.
+      </div>
+    );
+  }
+  return (
+    <>
+      {timeline == null && posts == null && <TimelineLoading />}
+      {timeline && (
+        <TimelineCard
+          className="timeline-card"
+          timeline={timeline}
+          connectionStatus={signalrState}
+          onReload={updateTimeline}
+        />
+      )}
+      {posts && (
+        <div style={style} className={classnames("timeline", className)}>
+          <TimelineEmptyItem className="timeline-top" height={50} />
+          {timeline?.postable ? (
+            <TimelinePostEdit timeline={timeline} onPosted={updatePosts} />
+          ) : user == null ? (
+            <TimelinePostEditNoLogin />
+          ) : null}
+          <TimelinePostListView posts={posts} onReload={updatePosts} />
+        </div>
+      )}
+    </>
+  );
+};
+
+export default Timeline;
diff --git a/FrontEnd/src/pages/timeline/TimelineCard.tsx b/FrontEnd/src/pages/timeline/TimelineCard.tsx
new file mode 100644
index 00000000..8ce133c0
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/TimelineCard.tsx
@@ -0,0 +1,167 @@
+import * as React from "react";
+import { useTranslation } from "react-i18next";
+import classnames from "classnames";
+import { HubConnectionState } from "@microsoft/signalr";
+
+import { useIsSmallScreen } from "@/utilities/hooks";
+import { timelineVisibilityTooltipTranslationMap } from "@/services/timeline";
+import { useUser } from "@/services/user";
+import { pushAlert } from "@/services/alert";
+import { HttpTimelineInfo } from "@/http/timeline";
+import { getHttpBookmarkClient } from "@/http/bookmark";
+
+import UserAvatar from "@/views/common/user/UserAvatar";
+import PopupMenu from "@/views/common/menu/PopupMenu";
+import FullPageDialog from "@/views/common/dialog/FullPageDialog";
+import Card from "@/views/common/Card";
+import TimelineDeleteDialog from "./TimelineDeleteDialog";
+import ConnectionStatusBadge from "./ConnectionStatusBadge";
+import CollapseButton from "./CollapseButton";
+import { TimelineMemberDialog } from "./TimelineMember";
+import TimelinePropertyChangeDialog from "./TimelinePropertyChangeDialog";
+import IconButton from "@/views/common/button/IconButton";
+
+export interface TimelinePageCardProps {
+  timeline: HttpTimelineInfo;
+  connectionStatus: HubConnectionState;
+  className?: string;
+  onReload: () => void;
+}
+
+const TimelineCard: React.FC<TimelinePageCardProps> = (props) => {
+  const { timeline, connectionStatus, onReload, className } = props;
+
+  const { t } = useTranslation();
+
+  const [dialog, setDialog] = React.useState<
+    "member" | "property" | "delete" | null
+  >(null);
+
+  const [collapse, setCollapse] = React.useState(true);
+  const toggleCollapse = (): void => {
+    setCollapse((o) => !o);
+  };
+
+  const isSmallScreen = useIsSmallScreen();
+
+  const user = useUser();
+
+  const content = (
+    <>
+      <h3 className="cru-color-primary d-inline-block align-middle">
+        {timeline.title}
+        <small className="ms-3 cru-color-secondary">{timeline.nameV2}</small>
+      </h3>
+      <div>
+        <UserAvatar
+          username={timeline.owner.username}
+          className="cru-avatar small cru-round me-3"
+        />
+        {timeline.owner.nickname}
+        <small className="ms-3 cru-color-secondary">
+          @{timeline.owner.username}
+        </small>
+      </div>
+      <p className="mb-0">{timeline.description}</p>
+      <small className="mt-1 d-block">
+        {t(timelineVisibilityTooltipTranslationMap[timeline.visibility])}
+      </small>
+      <div className="mt-2 cru-text-end">
+        {user != null ? (
+          <IconButton
+            icon={timeline.isBookmark ? "bookmark-fill" : "bookmark"}
+            className="me-3"
+            onClick={() => {
+              getHttpBookmarkClient()
+                [timeline.isBookmark ? "delete" : "post"](
+                  user.username,
+                  timeline.owner.username,
+                  timeline.nameV2,
+                )
+                .then(onReload, () => {
+                  pushAlert({
+                    message: timeline.isBookmark
+                      ? "timeline.removeBookmarkFail"
+                      : "timeline.addBookmarkFail",
+                    type: "danger",
+                  });
+                });
+            }}
+          />
+        ) : null}
+        <IconButton
+          icon="people"
+          className="me-3"
+          onClick={() => setDialog("member")}
+        />
+        {timeline.manageable ? (
+          <PopupMenu
+            items={[
+              {
+                type: "button",
+                text: "timeline.manageItem.property",
+                onClick: () => setDialog("property"),
+              },
+              { type: "divider" },
+              {
+                type: "button",
+                onClick: () => setDialog("delete"),
+                color: "danger",
+                text: "timeline.manageItem.delete",
+              },
+            ]}
+            containerClassName="d-inline"
+          >
+            <IconButton icon="three-dots-vertical" />
+          </PopupMenu>
+        ) : null}
+      </div>
+    </>
+  );
+
+  return (
+    <>
+      <Card className={classnames("p-2 cru-clearfix", className)}>
+        <div
+          className={classnames(
+            "cru-float-right d-flex align-items-center",
+            !collapse && "ms-3",
+          )}
+        >
+          <ConnectionStatusBadge status={connectionStatus} className="me-2" />
+          <CollapseButton collapse={collapse} onClick={toggleCollapse} />
+        </div>
+        {isSmallScreen ? (
+          <FullPageDialog
+            onBack={toggleCollapse}
+            show={!collapse}
+            contentContainerClassName="p-2"
+          >
+            {content}
+          </FullPageDialog>
+        ) : (
+          <div style={{ display: collapse ? "none" : "inline" }}>{content}</div>
+        )}
+      </Card>
+      <TimelineMemberDialog
+        timeline={timeline}
+        onClose={() => setDialog(null)}
+        open={dialog === "member"}
+        onChange={onReload}
+      />
+      <TimelinePropertyChangeDialog
+        timeline={timeline}
+        close={() => setDialog(null)}
+        open={dialog === "property"}
+        onChange={onReload}
+      />
+      <TimelineDeleteDialog
+        timeline={timeline}
+        open={dialog === "delete"}
+        close={() => setDialog(null)}
+      />
+    </>
+  );
+};
+
+export default TimelineCard;
diff --git a/FrontEnd/src/pages/timeline/TimelineDateLabel.tsx b/FrontEnd/src/pages/timeline/TimelineDateLabel.tsx
new file mode 100644
index 00000000..5f4ac706
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/TimelineDateLabel.tsx
@@ -0,0 +1,19 @@
+import * as React from "react";
+import TimelineLine from "./TimelineLine";
+
+export interface TimelineDateItemProps {
+  date: Date;
+}
+
+const TimelineDateLabel: React.FC<TimelineDateItemProps> = ({ date }) => {
+  return (
+    <div className="timeline-date-item">
+      <TimelineLine center="none" />
+      <div className="timeline-date-item-badge">
+        {date.toLocaleDateString()}
+      </div>
+    </div>
+  );
+};
+
+export default TimelineDateLabel;
diff --git a/FrontEnd/src/pages/timeline/TimelineDeleteDialog.tsx b/FrontEnd/src/pages/timeline/TimelineDeleteDialog.tsx
new file mode 100644
index 00000000..d5b22aee
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/TimelineDeleteDialog.tsx
@@ -0,0 +1,61 @@
+import * as React from "react";
+import { useNavigate } from "react-router-dom";
+import { Trans } from "react-i18next";
+
+import { getHttpTimelineClient, HttpTimelineInfo } from "@/http/timeline";
+
+import OperationDialog from "@/views/common/dialog/OperationDialog";
+
+interface TimelineDeleteDialog {
+  timeline: HttpTimelineInfo;
+  open: boolean;
+  close: () => void;
+}
+
+const TimelineDeleteDialog: React.FC<TimelineDeleteDialog> = (props) => {
+  const navigate = useNavigate();
+
+  const { timeline } = props;
+
+  return (
+    <OperationDialog
+      open={props.open}
+      onClose={props.close}
+      title="timeline.deleteDialog.title"
+      color="danger"
+      inputPrompt={() => (
+        <Trans
+          i18nKey="timeline.deleteDialog.inputPrompt"
+          values={{ name: timeline.nameV2 }}
+        >
+          0<code className="mx-2">1</code>2
+        </Trans>
+      )}
+      inputs={{
+        inputs: [
+          {
+            key: "name",
+            type: "text",
+            label: "",
+          },
+        ],
+        validator: ({ name }) => {
+          if (name !== timeline.nameV2) {
+            return { name: "timeline.deleteDialog.notMatch" };
+          }
+        },
+      }}
+      onProcess={() => {
+        return getHttpTimelineClient().deleteTimeline(
+          timeline.owner.username,
+          timeline.nameV2,
+        );
+      }}
+      onSuccessAndClose={() => {
+        navigate("/", { replace: true });
+      }}
+    />
+  );
+};
+
+export default TimelineDeleteDialog;
diff --git a/FrontEnd/src/pages/timeline/TimelineEmptyItem.tsx b/FrontEnd/src/pages/timeline/TimelineEmptyItem.tsx
new file mode 100644
index 00000000..5e0728d4
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/TimelineEmptyItem.tsx
@@ -0,0 +1,25 @@
+import * as React from "react";
+import classnames from "classnames";
+
+import TimelineLine, { TimelineLineProps } from "./TimelineLine";
+
+export interface TimelineEmptyItemProps extends Partial<TimelineLineProps> {
+  height?: number | string;
+  className?: string;
+  style?: React.CSSProperties;
+}
+
+const TimelineEmptyItem: React.FC<TimelineEmptyItemProps> = (props) => {
+  const { height, style, className, center, ...lineProps } = props;
+
+  return (
+    <div
+      style={{ ...style, height: height }}
+      className={classnames("timeline-item", className)}
+    >
+      <TimelineLine center={center ?? "none"} {...lineProps} />
+    </div>
+  );
+};
+
+export default TimelineEmptyItem;
diff --git a/FrontEnd/src/pages/timeline/TimelineLine.tsx b/FrontEnd/src/pages/timeline/TimelineLine.tsx
new file mode 100644
index 00000000..4a87e6e0
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/TimelineLine.tsx
@@ -0,0 +1,51 @@
+import * as React from "react";
+import classnames from "classnames";
+
+export interface TimelineLineProps {
+  current?: boolean;
+  startSegmentLength?: string | number;
+  center: "node" | "loading" | "none";
+  className?: string;
+  style?: React.CSSProperties;
+}
+
+const TimelineLine: React.FC<TimelineLineProps> = ({
+  startSegmentLength,
+  center,
+  current,
+  className,
+  style,
+}) => {
+  return (
+    <div
+      className={classnames(
+        "timeline-line",
+        current && "current",
+        center === "loading" && "loading",
+        className
+      )}
+      style={style}
+    >
+      <div className="segment start" style={{ height: startSegmentLength }} />
+      {center !== "none" ? (
+        <div className="node-container">
+          <div className="node"></div>
+          {center === "loading" ? (
+            <svg className="node-loading-edge" viewBox="0 0 100 100">
+              <path
+                d="M 50,10 A 40 40 45 0 1 78.28,21.72"
+                stroke="currentcolor"
+                strokeLinecap="square"
+                strokeWidth="8"
+              />
+            </svg>
+          ) : null}
+        </div>
+      ) : null}
+      {center !== "loading" ? <div className="segment end"></div> : null}
+      {current && <div className="segment current-end" />}
+    </div>
+  );
+};
+
+export default TimelineLine;
diff --git a/FrontEnd/src/pages/timeline/TimelineLoading.tsx b/FrontEnd/src/pages/timeline/TimelineLoading.tsx
new file mode 100644
index 00000000..f876cba9
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/TimelineLoading.tsx
@@ -0,0 +1,16 @@
+import * as React from "react";
+
+import TimelineEmptyItem from "./TimelineEmptyItem";
+
+const TimelineLoading: React.FC = () => {
+  return (
+    <TimelineEmptyItem
+      className="timeline-top-loading-enter"
+      height={100}
+      center="loading"
+      startSegmentLength={56}
+    />
+  );
+};
+
+export default TimelineLoading;
diff --git a/FrontEnd/src/pages/timeline/TimelineMember.css b/FrontEnd/src/pages/timeline/TimelineMember.css
new file mode 100644
index 00000000..adb78764
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/TimelineMember.css
@@ -0,0 +1,8 @@
+.timeline-member-item {

+  border: var(--cru-background-1-color) solid;

+  border-width: 0.5px 1px;

+}

+

+.timeline-member-item > div {

+  padding: 0.5em;

+}

diff --git a/FrontEnd/src/pages/timeline/TimelineMember.tsx b/FrontEnd/src/pages/timeline/TimelineMember.tsx
new file mode 100644
index 00000000..6c5d29ba
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/TimelineMember.tsx
@@ -0,0 +1,202 @@
+import { useState } from "react";
+import * as React from "react";
+import { useTranslation } from "react-i18next";
+
+import { convertI18nText, I18nText } from "@/common";
+
+import { HttpUser } from "@/http/user";
+import { getHttpSearchClient } from "@/http/search";
+import { getHttpTimelineClient, HttpTimelineInfo } from "@/http/timeline";
+
+import SearchInput from "@/views/common/SearchInput";
+import UserAvatar from "@/views/common/user/UserAvatar";
+import Button from "@/views/common/button/Button";
+import Dialog from "@/views/common/dialog/Dialog";
+
+import "./TimelineMember.css";
+
+const TimelineMemberItem: React.FC<{
+  user: HttpUser;
+  add?: boolean;
+  onAction?: (username: string) => void;
+}> = ({ user, add, onAction }) => {
+  return (
+    <div className="container timeline-member-item">
+      <div className="row">
+        <div className="col col-auto">
+          <UserAvatar username={user.username} className="cru-avatar small" />
+        </div>
+        <div className="col">
+          <div className="row">{user.nickname}</div>
+          <small className="row">{"@" + user.username}</small>
+        </div>
+        {onAction ? (
+          <div className="col col-auto">
+            <Button
+              text={`timeline.member.${add ? "add" : "remove"}`}
+              color={add ? "success" : "danger"}
+              onClick={() => {
+                onAction(user.username);
+              }}
+            />
+          </div>
+        ) : null}
+      </div>
+    </div>
+  );
+};
+
+const TimelineMemberUserSearch: React.FC<{
+  timeline: HttpTimelineInfo;
+  onChange: () => void;
+}> = ({ timeline, onChange }) => {
+  const { t } = useTranslation();
+
+  const [userSearchText, setUserSearchText] = useState<string>("");
+  const [userSearchState, setUserSearchState] = useState<
+    | {
+        type: "users";
+        data: HttpUser[];
+      }
+    | { type: "error"; data: I18nText }
+    | { type: "loading" }
+    | { type: "init" }
+  >({ type: "init" });
+
+  return (
+    <>
+      <SearchInput
+        className="mt-3"
+        value={userSearchText}
+        onChange={(v) => {
+          setUserSearchText(v);
+        }}
+        loading={userSearchState.type === "loading"}
+        onButtonClick={() => {
+          if (userSearchText === "") {
+            setUserSearchState({
+              type: "error",
+              data: "login.emptyUsername",
+            });
+            return;
+          }
+          setUserSearchState({ type: "loading" });
+          getHttpSearchClient()
+            .searchUsers(userSearchText)
+            .then(
+              (users) => {
+                users = users.filter(
+                  (user) =>
+                    timeline.members.findIndex(
+                      (m) => m.username === user.username
+                    ) === -1 && timeline.owner.username !== user.username
+                );
+                setUserSearchState({ type: "users", data: users });
+              },
+              (e) => {
+                setUserSearchState({
+                  type: "error",
+                  data: { type: "custom", value: String(e) },
+                });
+              }
+            );
+        }}
+      />
+      {(() => {
+        if (userSearchState.type === "users") {
+          const users = userSearchState.data;
+          if (users.length === 0) {
+            return <div>{t("timeline.member.noUserAvailableToAdd")}</div>;
+          } else {
+            return (
+              <div className="mt-2">
+                {users.map((user) => (
+                  <TimelineMemberItem
+                    key={user.username}
+                    user={user}
+                    add
+                    onAction={() => {
+                      void getHttpTimelineClient()
+                        .memberPut(
+                          timeline.owner.username,
+                          timeline.nameV2,
+                          user.username
+                        )
+                        .then(() => {
+                          setUserSearchText("");
+                          setUserSearchState({ type: "init" });
+                          onChange();
+                        });
+                    }}
+                  />
+                ))}
+              </div>
+            );
+          }
+        } else if (userSearchState.type === "error") {
+          return (
+            <div className="cru-color-danger">
+              {convertI18nText(userSearchState.data, t)}
+            </div>
+          );
+        }
+      })()}
+    </>
+  );
+};
+
+export interface TimelineMemberProps {
+  timeline: HttpTimelineInfo;
+  onChange: () => void;
+}
+
+const TimelineMember: React.FC<TimelineMemberProps> = (props) => {
+  const { timeline, onChange } = props;
+  const members = [timeline.owner, ...timeline.members];
+
+  return (
+    <div className="container px-4 py-3">
+      <div>
+        {members.map((member, index) => (
+          <TimelineMemberItem
+            key={member.username}
+            user={member}
+            onAction={
+              timeline.manageable && index !== 0
+                ? () => {
+                    void getHttpTimelineClient()
+                      .memberDelete(
+                        timeline.owner.username,
+                        timeline.nameV2,
+                        member.username
+                      )
+                      .then(onChange);
+                  }
+                : undefined
+            }
+          />
+        ))}
+      </div>
+      {timeline.manageable ? (
+        <TimelineMemberUserSearch timeline={timeline} onChange={onChange} />
+      ) : null}
+    </div>
+  );
+};
+
+export default TimelineMember;
+
+export interface TimelineMemberDialogProps extends TimelineMemberProps {
+  open: boolean;
+  onClose: () => void;
+}
+
+export const TimelineMemberDialog: React.FC<TimelineMemberDialogProps> = (
+  props
+) => {
+  return (
+    <Dialog open={props.open} onClose={props.onClose}>
+      <TimelineMember {...props} />
+    </Dialog>
+  );
+};
diff --git a/FrontEnd/src/pages/timeline/TimelinePostContentView.tsx b/FrontEnd/src/pages/timeline/TimelinePostContentView.tsx
new file mode 100644
index 00000000..41080e10
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/TimelinePostContentView.tsx
@@ -0,0 +1,187 @@
+import * as React from "react";
+import classnames from "classnames";
+import { marked } from "marked";
+
+import { UiLogicError } from "@/common";
+
+import { HttpNetworkError } from "@/http/common";
+import { getHttpTimelineClient, HttpTimelinePostInfo } from "@/http/timeline";
+
+import { useUser } from "@/services/user";
+
+import Skeleton from "@/views/common/Skeleton";
+import LoadFailReload from "@/views/common/LoadFailReload";
+
+const TextView: React.FC<TimelinePostContentViewProps> = (props) => {
+  const { post, className, style } = props;
+
+  const [text, setText] = React.useState<string | null>(null);
+  const [error, setError] = React.useState<"offline" | "error" | null>(null);
+
+  const [reloadKey, setReloadKey] = React.useState<number>(0);
+
+  React.useEffect(() => {
+    let subscribe = true;
+
+    setText(null);
+    setError(null);
+
+    void getHttpTimelineClient()
+      .getPostDataAsString(post.timelineOwnerV2, post.timelineNameV2, post.id)
+      .then(
+        (data) => {
+          if (subscribe) setText(data);
+        },
+        (error) => {
+          if (subscribe) {
+            if (error instanceof HttpNetworkError) {
+              setError("offline");
+            } else {
+              setError("error");
+            }
+          }
+        }
+      );
+
+    return () => {
+      subscribe = false;
+    };
+  }, [post.timelineOwnerV2, post.timelineNameV2, post.id, reloadKey]);
+
+  if (error != null) {
+    return (
+      <LoadFailReload
+        className={className}
+        style={style}
+        onReload={() => setReloadKey(reloadKey + 1)}
+      />
+    );
+  } else if (text == null) {
+    return <Skeleton />;
+  } else {
+    return (
+      <div className={className} style={style}>
+        {text}
+      </div>
+    );
+  }
+};
+
+const ImageView: React.FC<TimelinePostContentViewProps> = (props) => {
+  const { post, className, style } = props;
+
+  useUser();
+
+  return (
+    <img
+      src={getHttpTimelineClient().generatePostDataUrl(
+        post.timelineOwnerV2,
+        post.timelineNameV2,
+        post.id
+      )}
+      className={classnames(className, "timeline-content-image")}
+      style={style}
+    />
+  );
+};
+
+const MarkdownView: React.FC<TimelinePostContentViewProps> = (props) => {
+  const { post, className, style } = props;
+
+  const [markdown, setMarkdown] = React.useState<string | null>(null);
+  const [error, setError] = React.useState<"offline" | "error" | null>(null);
+
+  const [reloadKey, setReloadKey] = React.useState<number>(0);
+
+  React.useEffect(() => {
+    let subscribe = true;
+
+    setMarkdown(null);
+    setError(null);
+
+    void getHttpTimelineClient()
+      .getPostDataAsString(post.timelineOwnerV2, post.timelineNameV2, post.id)
+      .then(
+        (data) => {
+          if (subscribe) setMarkdown(data);
+        },
+        (error) => {
+          if (subscribe) {
+            if (error instanceof HttpNetworkError) {
+              setError("offline");
+            } else {
+              setError("error");
+            }
+          }
+        }
+      );
+
+    return () => {
+      subscribe = false;
+    };
+  }, [post.timelineOwnerV2, post.timelineNameV2, post.id, reloadKey]);
+
+  const markdownHtml = React.useMemo<string | null>(() => {
+    if (markdown == null) return null;
+    return marked.parse(markdown);
+  }, [markdown]);
+
+  if (error != null) {
+    return (
+      <LoadFailReload
+        className={className}
+        style={style}
+        onReload={() => setReloadKey(reloadKey + 1)}
+      />
+    );
+  } else if (markdown == null) {
+    return <Skeleton />;
+  } else {
+    if (markdownHtml == null) {
+      throw new UiLogicError("Markdown is not null but markdown html is.");
+    }
+    return (
+      <div
+        className={classnames(className, "markdown-container")}
+        style={style}
+        dangerouslySetInnerHTML={{
+          __html: markdownHtml,
+        }}
+      />
+    );
+  }
+};
+
+export interface TimelinePostContentViewProps {
+  post: HttpTimelinePostInfo;
+  className?: string;
+  style?: React.CSSProperties;
+}
+
+const viewMap: Record<string, React.FC<TimelinePostContentViewProps>> = {
+  "text/plain": TextView,
+  "text/markdown": MarkdownView,
+  "image/png": ImageView,
+  "image/jpeg": ImageView,
+  "image/gif": ImageView,
+  "image/webp": ImageView,
+};
+
+const TimelinePostContentView: React.FC<TimelinePostContentViewProps> = (
+  props
+) => {
+  const { post, className, style } = props;
+
+  const type = post.dataList[0].kind;
+
+  if (type in viewMap) {
+    const View = viewMap[type];
+    return <View post={post} className={className} style={style} />;
+  } else {
+    // TODO: i18n
+    console.error("Unknown post type", post);
+    return <div>Error, unknown post type!</div>;
+  }
+};
+
+export default TimelinePostContentView;
diff --git a/FrontEnd/src/pages/timeline/TimelinePostEdit.css b/FrontEnd/src/pages/timeline/TimelinePostEdit.css
new file mode 100644
index 00000000..9b7629e2
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/TimelinePostEdit.css
@@ -0,0 +1,10 @@
+.timeline-post-edit {

+  position: sticky !important;

+  top: 106px;

+  z-index: 100;

+}

+

+.timeline-post-edit-image {

+  max-width: 100px;

+  max-height: 100px;

+}

diff --git a/FrontEnd/src/pages/timeline/TimelinePostEdit.tsx b/FrontEnd/src/pages/timeline/TimelinePostEdit.tsx
new file mode 100644
index 00000000..c1fa0dd9
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/TimelinePostEdit.tsx
@@ -0,0 +1,267 @@
+import * as React from "react";
+import { useTranslation } from "react-i18next";
+
+import { UiLogicError } from "@/common";
+
+import {
+  getHttpTimelineClient,
+  HttpTimelineInfo,
+  HttpTimelinePostInfo,
+  HttpTimelinePostPostRequestData,
+} from "@/http/timeline";
+
+import { pushAlert } from "@/services/alert";
+
+import base64 from "@/utilities/base64";
+
+import BlobImage from "@/views/common/BlobImage";
+import LoadingButton from "@/views/common/button/LoadingButton";
+import PopupMenu from "@/views/common/menu/PopupMenu";
+import MarkdownPostEdit from "./MarkdownPostEdit";
+import TimelinePostEditCard from "./TimelinePostEditCard";
+import IconButton from "@/views/common/button/IconButton";
+
+import "./TimelinePostEdit.css";
+
+interface TimelinePostEditTextProps {
+  text: string;
+  disabled: boolean;
+  onChange: (text: string) => void;
+  className?: string;
+  style?: React.CSSProperties;
+}
+
+const TimelinePostEditText: React.FC<TimelinePostEditTextProps> = (props) => {
+  const { text, disabled, onChange, className, style } = props;
+
+  return (
+    <textarea
+      value={text}
+      disabled={disabled}
+      onChange={(event) => {
+        onChange(event.target.value);
+      }}
+      className={className}
+      style={style}
+    />
+  );
+};
+
+interface TimelinePostEditImageProps {
+  onSelect: (file: File | null) => void;
+  disabled: boolean;
+}
+
+const TimelinePostEditImage: React.FC<TimelinePostEditImageProps> = (props) => {
+  const { onSelect, disabled } = props;
+
+  const { t } = useTranslation();
+
+  const [file, setFile] = React.useState<File | null>(null);
+  const [error, setError] = React.useState<boolean>(false);
+
+  const onInputChange: React.ChangeEventHandler<HTMLInputElement> = (e) => {
+    setError(false);
+    const files = e.target.files;
+    if (files == null || files.length === 0) {
+      setFile(null);
+      onSelect(null);
+    } else {
+      setFile(files[0]);
+    }
+  };
+
+  React.useEffect(() => {
+    return () => {
+      onSelect(null);
+    };
+  }, [onSelect]);
+
+  return (
+    <>
+      <input
+        type="file"
+        onChange={onInputChange}
+        accept="image/*"
+        disabled={disabled}
+        className="mx-3 my-1"
+      />
+      {file != null && !error && (
+        <BlobImage
+          blob={file}
+          className="timeline-post-edit-image"
+          onLoad={() => onSelect(file)}
+          onError={() => {
+            onSelect(null);
+            setError(true);
+          }}
+        />
+      )}
+      {error ? <div className="text-danger">{t("loadImageError")}</div> : null}
+    </>
+  );
+};
+
+type PostKind = "text" | "markdown" | "image";
+
+const postKindIconMap: Record<PostKind, string> = {
+  text: "fonts",
+  markdown: "markdown",
+  image: "image",
+};
+
+export interface TimelinePostEditProps {
+  className?: string;
+  style?: React.CSSProperties;
+  timeline: HttpTimelineInfo;
+  onPosted: (newPost: HttpTimelinePostInfo) => void;
+}
+
+const TimelinePostEdit: React.FC<TimelinePostEditProps> = (props) => {
+  const { timeline, style, className, onPosted } = props;
+
+  const { t } = useTranslation();
+
+  const [process, setProcess] = React.useState<boolean>(false);
+
+  const [kind, setKind] = React.useState<Exclude<PostKind, "markdown">>("text");
+  const [showMarkdown, setShowMarkdown] = React.useState<boolean>(false);
+
+  const [text, setText] = React.useState<string>("");
+  const [image, setImage] = React.useState<File | null>(null);
+
+  const draftTextLocalStorageKey = `timeline.${timeline.owner.username}.${timeline.nameV2}.postDraft.text`;
+
+  React.useEffect(() => {
+    setText(window.localStorage.getItem(draftTextLocalStorageKey) ?? "");
+  }, [draftTextLocalStorageKey]);
+
+  const canSend =
+    (kind === "text" && text.length !== 0) ||
+    (kind === "image" && image != null);
+
+  const onPostError = (): void => {
+    pushAlert({
+      type: "danger",
+      message: "timeline.sendPostFailed",
+    });
+  };
+
+  const onSend = async (): Promise<void> => {
+    setProcess(true);
+
+    let requestData: HttpTimelinePostPostRequestData;
+    switch (kind) {
+      case "text":
+        requestData = {
+          contentType: "text/plain",
+          data: await base64(text),
+        };
+        break;
+      case "image":
+        if (image == null) {
+          throw new UiLogicError(
+            "Content type is image but image blob is null.",
+          );
+        }
+        requestData = {
+          contentType: image.type,
+          data: await base64(image),
+        };
+        break;
+      default:
+        throw new UiLogicError("Unknown content type.");
+    }
+
+    getHttpTimelineClient()
+      .postPost(timeline.owner.username, timeline.nameV2, {
+        dataList: [requestData],
+      })
+      .then(
+        (data) => {
+          if (kind === "text") {
+            setText("");
+            window.localStorage.removeItem(draftTextLocalStorageKey);
+          }
+          setProcess(false);
+          setKind("text");
+          onPosted(data);
+        },
+        () => {
+          setProcess(false);
+          onPostError();
+        },
+      );
+  };
+
+  return (
+    <TimelinePostEditCard className={className} style={style}>
+      {showMarkdown ? (
+        <MarkdownPostEdit
+          className="cru-fill-parent"
+          onClose={() => setShowMarkdown(false)}
+          owner={timeline.owner.username}
+          timeline={timeline.nameV2}
+          onPosted={onPosted}
+          onPostError={onPostError}
+        />
+      ) : (
+        <div className="row">
+          <div className="col px-1 py-1">
+            {(() => {
+              if (kind === "text") {
+                return (
+                  <TimelinePostEditText
+                    className="cru-fill-parent timeline-post-edit"
+                    text={text}
+                    disabled={process}
+                    onChange={(t) => {
+                      setText(t);
+                      window.localStorage.setItem(draftTextLocalStorageKey, t);
+                    }}
+                  />
+                );
+              } else if (kind === "image") {
+                return (
+                  <TimelinePostEditImage
+                    onSelect={setImage}
+                    disabled={process}
+                  />
+                );
+              }
+            })()}
+          </div>
+          <div className="col col-auto align-self-end m-1">
+            <div className="d-block cru-text-center mt-1 mb-2">
+              <PopupMenu
+                items={(["text", "image", "markdown"] as const).map((kind) => ({
+                  type: "button",
+                  text: `timeline.post.type.${kind}`,
+                  iconClassName: postKindIconMap[kind],
+                  onClick: () => {
+                    if (kind === "markdown") {
+                      setShowMarkdown(true);
+                    } else {
+                      setKind(kind);
+                    }
+                  },
+                }))}
+              >
+                <IconButton large icon={postKindIconMap[kind]} />
+              </PopupMenu>
+            </div>
+            <LoadingButton
+              onClick={() => void onSend()}
+              disabled={!canSend}
+              loading={process}
+            >
+              {t("timeline.send")}
+            </LoadingButton>
+          </div>
+        </div>
+      )}
+    </TimelinePostEditCard>
+  );
+};
+
+export default TimelinePostEdit;
diff --git a/FrontEnd/src/pages/timeline/TimelinePostEditCard.tsx b/FrontEnd/src/pages/timeline/TimelinePostEditCard.tsx
new file mode 100644
index 00000000..fdd53983
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/TimelinePostEditCard.tsx
@@ -0,0 +1,31 @@
+import * as React from "react";
+import classnames from "classnames";
+
+import Card from "@/views/common/Card";
+import TimelineLine from "./TimelineLine";
+
+import "./TimelinePostEdit.css";
+
+export interface TimelinePostEditCardProps {
+  className?: string;
+  style?: React.CSSProperties;
+  children?: React.ReactNode;
+}
+
+const TimelinePostEdit: React.FC<TimelinePostEditCardProps> = ({
+  className,
+  style,
+  children,
+}) => {
+  return (
+    <div
+      className={classnames("timeline-item timeline-post-edit", className)}
+      style={style}
+    >
+      <TimelineLine center="node" />
+      <Card className="timeline-item-card">{children}</Card>
+    </div>
+  );
+};
+
+export default TimelinePostEdit;
diff --git a/FrontEnd/src/pages/timeline/TimelinePostEditNoLogin.tsx b/FrontEnd/src/pages/timeline/TimelinePostEditNoLogin.tsx
new file mode 100644
index 00000000..1ef0a287
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/TimelinePostEditNoLogin.tsx
@@ -0,0 +1,18 @@
+import * as React from "react";
+import { Trans } from "react-i18next";
+import { Link } from "react-router-dom";
+
+import TimelinePostEditCard from "./TimelinePostEditCard";
+
+export default function TimelinePostEditNoLogin(): React.ReactElement | null {
+  return (
+    <TimelinePostEditCard>
+      <div className="mt-3 mb-4">
+        <Trans
+          i18nKey="timeline.postNoLogin"
+          components={{ l: <Link to="/login" /> }}
+        />
+      </div>
+    </TimelinePostEditCard>
+  );
+}
diff --git a/FrontEnd/src/pages/timeline/TimelinePostListView.tsx b/FrontEnd/src/pages/timeline/TimelinePostListView.tsx
new file mode 100644
index 00000000..f878b004
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/TimelinePostListView.tsx
@@ -0,0 +1,76 @@
+import { Fragment } from "react";
+import * as React from "react";
+
+import { HttpTimelinePostInfo } from "@/http/timeline";
+
+import TimelinePostView from "./TimelinePostView";
+import TimelineDateLabel from "./TimelineDateLabel";
+
+function dateEqual(left: Date, right: Date): boolean {
+  return (
+    left.getDate() == right.getDate() &&
+    left.getMonth() == right.getMonth() &&
+    left.getFullYear() == right.getFullYear()
+  );
+}
+
+export interface TimelinePostListViewProps {
+  posts: HttpTimelinePostInfo[];
+  onReload: () => void;
+}
+
+const TimelinePostListView: React.FC<TimelinePostListViewProps> = (props) => {
+  const { posts, onReload } = props;
+
+  const groupedPosts = React.useMemo<
+    {
+      date: Date;
+      posts: (HttpTimelinePostInfo & { index: number })[];
+    }[]
+  >(() => {
+    const result: {
+      date: Date;
+      posts: (HttpTimelinePostInfo & { index: number })[];
+    }[] = [];
+    let index = 0;
+    for (const post of posts) {
+      const time = new Date(post.time);
+      if (result.length === 0) {
+        result.push({ date: time, posts: [{ ...post, index }] });
+      } else {
+        const lastGroup = result[result.length - 1];
+        if (dateEqual(lastGroup.date, time)) {
+          lastGroup.posts.push({ ...post, index });
+        } else {
+          result.push({ date: time, posts: [{ ...post, index }] });
+        }
+      }
+      index++;
+    }
+    return result;
+  }, [posts]);
+
+  return (
+    <>
+      {groupedPosts.map((group) => {
+        return (
+          <Fragment key={group.date.toDateString()}>
+            <TimelineDateLabel date={group.date} />
+            {group.posts.map((post) => {
+              return (
+                <TimelinePostView
+                  key={post.id}
+                  post={post}
+                  onChanged={onReload}
+                  onDeleted={onReload}
+                />
+              );
+            })}
+          </Fragment>
+        );
+      })}
+    </>
+  );
+};
+
+export default TimelinePostListView;
diff --git a/FrontEnd/src/pages/timeline/TimelinePostView.tsx b/FrontEnd/src/pages/timeline/TimelinePostView.tsx
new file mode 100644
index 00000000..f7aec169
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/TimelinePostView.tsx
@@ -0,0 +1,149 @@
+import * as React from "react";
+import classnames from "classnames";
+
+import { getHttpTimelineClient, HttpTimelinePostInfo } from "@/http/timeline";
+
+import { pushAlert } from "@/services/alert";
+
+import { useClickOutside } from "@/utilities/hooks";
+
+import UserAvatar from "@/views/common/user/UserAvatar";
+import Card from "@/views/common/Card";
+import FlatButton from "@/views/common/button/FlatButton";
+import ConfirmDialog from "@/views/common/dialog/ConfirmDialog";
+import TimelineLine from "./TimelineLine";
+import TimelinePostContentView from "./TimelinePostContentView";
+import IconButton from "@/views/common/button/IconButton";
+
+export interface TimelinePostViewProps {
+  post: HttpTimelinePostInfo;
+  className?: string;
+  style?: React.CSSProperties;
+  cardStyle?: React.CSSProperties;
+  onChanged: (post: HttpTimelinePostInfo) => void;
+  onDeleted: () => void;
+}
+
+const TimelinePostView: React.FC<TimelinePostViewProps> = (props) => {
+  const { post, className, style, cardStyle, onChanged, onDeleted } = props;
+
+  const [operationMaskVisible, setOperationMaskVisible] =
+    React.useState<boolean>(false);
+  const [dialog, setDialog] = React.useState<
+    "delete" | "changeproperty" | null
+  >(null);
+
+  const [maskElement, setMaskElement] = React.useState<HTMLElement | null>(
+    null,
+  );
+
+  useClickOutside(maskElement, () => setOperationMaskVisible(false));
+
+  const cardRef = React.useRef<HTMLDivElement>(null);
+  React.useEffect(() => {
+    const cardIntersectionObserver = new IntersectionObserver(([e]) => {
+      if (e.intersectionRatio > 0) {
+        if (cardRef.current != null) {
+          cardRef.current.style.animationName = "timeline-post-enter";
+        }
+      }
+    });
+    if (cardRef.current) {
+      cardIntersectionObserver.observe(cardRef.current);
+    }
+
+    return () => {
+      cardIntersectionObserver.disconnect();
+    };
+  }, []);
+
+  return (
+    <div
+      id={`timeline-post-${post.id}`}
+      className={classnames("timeline-item", className)}
+      style={style}
+    >
+      <TimelineLine center="node" />
+      <Card
+        containerRef={cardRef}
+        className="timeline-item-card enter-animation"
+        style={cardStyle}
+      >
+        {post.editable ? (
+          <IconButton
+            icon="chevron-down"
+            color="primary"
+            className="cru-float-right"
+            onClick={(e) => {
+              setOperationMaskVisible(true);
+              e.stopPropagation();
+            }}
+          />
+        ) : null}
+        <div className="timeline-item-header">
+          <span className="me-2">
+            <span>
+              <UserAvatar
+                username={post.author.username}
+                className="timeline-avatar me-1"
+              />
+              <small className="text-dark me-2">{post.author.nickname}</small>
+              <small className="text-secondary white-space-no-wrap">
+                {new Date(post.time).toLocaleTimeString()}
+              </small>
+            </span>
+          </span>
+        </div>
+        <div className="timeline-content">
+          <TimelinePostContentView post={post} />
+        </div>
+        {operationMaskVisible ? (
+          <div
+            ref={setMaskElement}
+            className="timeline-post-item-options-mask"
+            onClick={() => {
+              setOperationMaskVisible(false);
+            }}
+          >
+            <FlatButton
+              text="changeProperty"
+              onClick={(e) => {
+                setDialog("changeproperty");
+                e.stopPropagation();
+              }}
+            />
+            <FlatButton
+              text="delete"
+              color="danger"
+              onClick={(e) => {
+                setDialog("delete");
+                e.stopPropagation();
+              }}
+            />
+          </div>
+        ) : null}
+      </Card>
+      <ConfirmDialog
+        title="timeline.post.deleteDialog.title"
+        body="timeline.post.deleteDialog.prompt"
+        open={dialog === "delete"}
+        onClose={() => {
+          setDialog(null);
+          setOperationMaskVisible(false);
+        }}
+        onConfirm={() => {
+          void getHttpTimelineClient()
+            .deletePost(post.timelineOwnerV2, post.timelineNameV2, post.id)
+            .then(onDeleted, () => {
+              pushAlert({
+                type: "danger",
+                message: "timeline.deletePostFailed",
+              });
+            });
+        }}
+      />
+    </div>
+  );
+};
+
+export default TimelinePostView;
diff --git a/FrontEnd/src/pages/timeline/TimelinePropertyChangeDialog.tsx b/FrontEnd/src/pages/timeline/TimelinePropertyChangeDialog.tsx
new file mode 100644
index 00000000..e26df3eb
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/TimelinePropertyChangeDialog.tsx
@@ -0,0 +1,87 @@
+import * as React from "react";
+
+import {
+  getHttpTimelineClient,
+  HttpTimelineInfo,
+  HttpTimelinePatchRequest,
+  kTimelineVisibilities,
+  TimelineVisibility,
+} from "@/http/timeline";
+
+import OperationDialog from "@/views/common/dialog/OperationDialog";
+
+export interface TimelinePropertyChangeDialogProps {
+  open: boolean;
+  close: () => void;
+  timeline: HttpTimelineInfo;
+  onChange: () => void;
+}
+
+const labelMap: { [key in TimelineVisibility]: string } = {
+  Private: "timeline.visibility.private",
+  Public: "timeline.visibility.public",
+  Register: "timeline.visibility.register",
+};
+
+const TimelinePropertyChangeDialog: React.FC<
+  TimelinePropertyChangeDialogProps
+> = (props) => {
+  const { timeline, onChange } = props;
+
+  return (
+    <OperationDialog
+      title={"timeline.dialogChangeProperty.title"}
+      inputs={{
+        scheme: {
+          inputs: [
+            {
+              key: "title",
+              type: "text",
+              label: "timeline.dialogChangeProperty.titleField",
+            },
+            {
+              key: "visibility",
+              type: "select",
+              label: "timeline.dialogChangeProperty.visibility",
+              options: kTimelineVisibilities.map((v) => ({
+                label: labelMap[v],
+                value: v,
+              })),
+            },
+            {
+              key: "description",
+              type: "text",
+              label: "timeline.dialogChangeProperty.description",
+            },
+          ],
+        },
+        dataInit: {
+          values: {
+            title: timeline.title,
+            visibility: timeline.visibility,
+            description: timeline.description,
+          },
+        },
+      }}
+      open={props.open}
+      onClose={props.close}
+      onProcess={({ title, visibility, description }) => {
+        const req: HttpTimelinePatchRequest = {};
+        if (title !== timeline.title) {
+          req.title = title as string;
+        }
+        if (visibility !== timeline.visibility) {
+          req.visibility = visibility as TimelineVisibility;
+        }
+        if (description !== timeline.description) {
+          req.description = description as string;
+        }
+        return getHttpTimelineClient()
+          .patchTimeline(timeline.owner.username, timeline.nameV2, req)
+          .then(onChange);
+      }}
+    />
+  );
+};
+
+export default TimelinePropertyChangeDialog;
diff --git a/FrontEnd/src/pages/timeline/index.tsx b/FrontEnd/src/pages/timeline/index.tsx
new file mode 100644
index 00000000..1dffdcc1
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/index.tsx
@@ -0,0 +1,23 @@
+import * as React from "react";
+import { useParams } from "react-router-dom";
+
+import { UiLogicError } from "@/common";
+
+import Timeline from "./Timeline";
+
+const TimelinePage: React.FC = () => {
+  const { owner, timeline: timelineNameParam } = useParams();
+
+  if (owner == null || owner == "")
+    throw new UiLogicError("Route param owner is not set.");
+
+  const timeline = timelineNameParam || "self";
+
+  return (
+    <div className="container">
+      <Timeline timelineOwner={owner} timelineName={timeline} />
+    </div>
+  );
+};
+
+export default TimelinePage;
diff --git a/FrontEnd/src/views/common/dialog/OperationDialog.tsx b/FrontEnd/src/views/common/dialog/OperationDialog.tsx
index da1ff0e0..de92e541 100644
--- a/FrontEnd/src/views/common/dialog/OperationDialog.tsx
+++ b/FrontEnd/src/views/common/dialog/OperationDialog.tsx
@@ -43,7 +43,7 @@ export interface OperationDialogProps<TData> {
   color?: ThemeColor;
   inputColor?: ThemeColor;
   title: Text;
-  inputPrompt?: Text;
+  inputPrompt?: () => ReactNode;
   successPrompt?: (data: TData) => ReactNode;
   failurePrompt?: (error: unknown) => ReactNode;
 
@@ -68,8 +68,6 @@ function OperationDialog<TData>(props: OperationDialogProps<TData>) {
     onSuccessAndClose,
   } = props;
 
-  const c = useC();
-
   type Step =
     | { type: "input" }
     | { type: "process" }
@@ -130,7 +128,7 @@ function OperationDialog<TData>(props: OperationDialogProps<TData>) {
 
     body = (
       <div>
-        <OperationDialogPrompt customMessage={c(inputPrompt)} />
+        <OperationDialogPrompt customMessage={inputPrompt?.()} />
         <InputGroup
           containerClassName="cru-operation-dialog-input-group"
           color={inputColor ?? "primary"}
diff --git a/FrontEnd/src/views/common/input/InputGroup.tsx b/FrontEnd/src/views/common/input/InputGroup.tsx
index ee89b05c..5714411c 100644
--- a/FrontEnd/src/views/common/input/InputGroup.tsx
+++ b/FrontEnd/src/views/common/input/InputGroup.tsx
@@ -70,6 +70,13 @@ export type InputErrorDict = Record<string, Text>;
 export type InputDisabledDict = Record<string, boolean>;
 export type InputDirtyDict = Record<string, boolean>;
 
+export type GeneralInputErrorDict =
+  | {
+      [key: string]: Text | null | undefined;
+    }
+  | null
+  | undefined;
+
 type MakeInputInfo<I extends Input> = Omit<I, "value" | "error" | "disabled">;
 
 export type InputInfo = {
@@ -79,7 +86,7 @@ export type InputInfo = {
 export type Validator = (
   values: InputValueDict,
   inputs: InputInfo[],
-) => InputErrorDict;
+) => GeneralInputErrorDict;
 
 export type InputScheme = {
   inputs: InputInfo[];
@@ -98,7 +105,12 @@ export type State = {
   data: InputData;
 };
 
-export type DataInitialization = Partial<InputData>;
+export type DataInitialization = {
+  values?: InputValueDict;
+  errors?: GeneralInputErrorDict;
+  disabled?: InputDisabledDict;
+  dirties?: InputDirtyDict;
+};
 
 export type Initialization = {
   scheme: InputScheme;
@@ -118,14 +130,14 @@ export interface InputGroupProps {
   onChange: (index: number, value: Input["value"]) => void;
 }
 
-function cleanObject<V>(o: Record<string, V>): Record<string, V> {
+function cleanObject<V>(o: Record<string, V>): Record<string, NonNullable<V>> {
   const result = { ...o };
   for (const key of Object.keys(result)) {
     if (result[key] == null) {
       delete result[key];
     }
   }
-  return result;
+  return result as never;
 }
 
 export type ConfirmResult =
@@ -138,6 +150,14 @@ export type ConfirmResult =
       errors: InputErrorDict;
     };
 
+function validate(
+  validator: Validator | null | undefined,
+  values: InputValueDict,
+  inputs: InputInfo[],
+): InputErrorDict {
+  return cleanObject(validator?.(values, inputs) ?? {});
+}
+
 export function useInputs(options: { init: Initializer }): {
   inputGroupProps: InputGroupProps;
   hasError: boolean;
@@ -182,18 +202,22 @@ export function useInputs(options: { init: Initializer }): {
       };
 
       checkKeys(dataInit?.values);
-      checkKeys(dataInit?.errors);
+      checkKeys(dataInit?.errors ?? {});
       checkKeys(dataInit?.disabled);
       checkKeys(dataInit?.dirties);
     }
 
-    function clean<V>(dict: Record<string, V> | undefined): Record<string, V> {
+    function clean<V>(
+      dict: Record<string, V> | null | undefined,
+    ): Record<string, NonNullable<V>> {
       return dict != null ? cleanObject(dict) : {};
     }
 
     const values: InputValueDict = {};
     const disabled: InputDisabledDict = clean(dataInit?.disabled);
     const dirties: InputDirtyDict = clean(dataInit?.dirties);
+    const isErrorSet = dataInit?.errors != null;
+    let errors: InputErrorDict = clean(dataInit?.errors);
 
     for (let i = 0; i < inputs.length; i++) {
       const input = inputs[i];
@@ -202,17 +226,14 @@ export function useInputs(options: { init: Initializer }): {
       values[key] = initializeValue(input, dataInit?.values?.[key]);
     }
 
-    let errors = dataInit?.errors;
-
-    if (errors != null) {
+    if (isErrorSet) {
       if (process.env.NODE_ENV === "development") {
         console.log(
           "You explicitly set errors (not undefined) in initializer, so validator won't run.",
         );
       }
-      errors = cleanObject(errors);
     } else {
-      errors = validator?.(values, inputs) ?? {};
+      errors = validate(validator, values, inputs);
     }
 
     return {
@@ -272,7 +293,7 @@ export function useInputs(options: { init: Initializer }): {
         const { key } = input;
         const newValues = { ...data.values, [key]: value };
         const newDirties = { ...data.dirties, [key]: true };
-        const newErrors = validator?.(newValues, scheme.inputs) ?? {};
+        const newErrors = validate(validator, newValues, scheme.inputs);
         setState({
           scheme,
           data: {
@@ -288,7 +309,7 @@ export function useInputs(options: { init: Initializer }): {
     hasErrorAndDirty: hasError && hasDirty,
     confirm() {
       const newDirties = createAllDirties();
-      const newErrors = validator?.(data.values, scheme.inputs) ?? {};
+      const newErrors = validate(validator, data.values, scheme.inputs);
 
       setState({
         scheme,