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/util/finiteExtent.ts

@@ -0,0 +1,33 @@
+/*
+Return the [minimum, maximum] extent, of the given typed array, ignoring
+non-finite values (ie, +Infinity, -Infinity).
+
+If undefined or empty array, or array contains only non-finite numbers,
+will return [undefined, undefined]
+*/
+
+function finiteExtent(tarr: any) {
+  let min;
+  let max;
+  let i;
+
+  for (i = 0; i < tarr.length; i += 1) {
+    const val = tarr[i];
+    if (Number.isFinite(val)) {
+      min = val;
+      max = val;
+      i += 1;
+      break;
+    }
+  }
+  for (; i < tarr.length; i += 1) {
+    const val = tarr[i];
+    if (Number.isFinite(val)) {
+      if (min > val) min = val;
+      if (max < val) max = val;
+    }
+  }
+  return [min, max];
+}
+
+export default finiteExtent;