Use strict check of typescript compiler.

1 files changed, 9 insertions, 0 deletions

diff --git a/Timeline/ClientApp/src/app/utilities/language-untilities.ts b/Timeline/ClientApp/src/app/utilities/language-untilities.ts
new file mode 100644
index 00000000..f898039a
--- /dev/null
+++ b/Timeline/ClientApp/src/app/utilities/language-untilities.ts
@@ -0,0 +1,9 @@
+export function nullIfUndefined<T>(value: T | undefined): T | null {
+  return value === undefined ? null : value;
+}
+
+export function throwIfFalsy(value: any, name: string = '<unknown name>') {
+  if (!value) {
+    throw new Error(name + ' is falsy.');
+  }
+}