TS migration. #2288. (#2328)

* Added TS. Updated build and linting config. Added types.

* [ts-migrate][.] Rename files from JS/JSX to TS/TSX

Co-authored-by: ts-migrate <>

* [ts-migrate][.] Run TS Migrate

Co-authored-by: ts-migrate <>

* Corrected files mangled by ts-migrate.

* Updated lint config, minor linting.

* Re-enabled Husky.

* Updated tests and config.

* Reverted webpack devtool config.

* Removed obsolete snapshots.

* Added annotations snap.

* Updated tsconfig includes wrt linting.

* Removed ts-migrate.

Co-authored-by: Timmy Huang <tihuan@users.noreply.github.com>

client/src/components/util/localStorage.ts

@@ -0,0 +1,22 @@
+export const KEYS = {
+  COOKIE_DECISION: "cxg.cookieDecision",
+  LOGIN_PROMPT: "cxg.LOGIN_PROMPT",
+};
+
+export function storageGet(key: any, defaultValue = null) {
+  try {
+    const val = window.localStorage.getItem(key);
+    if (val === null) return defaultValue;
+    return val;
+  } catch (e) {
+    return defaultValue;
+  }
+}
+
+export function storageSet(key: any, value: any) {
+  try {
+    window.localStorage.setItem(key, value);
+  } catch {
+    // continue
+  }
+}