Rewrite into TypeScript

lib/util.ts

@@ -0,0 +1,18 @@
+/**
+ * Halt the event loop for `duration` seconds
+ *
+ * @param {number} [duration=1] - The duration in seconds to wait for
+ */
+export const sleep = (duration: number = 1): void => {
+  Atomics.wait(new Int32Array(new SharedArrayBuffer(4)), 0, 0, (duration * 1000));
+};
+
+/**
+ * Get all bits from `bits`
+ *
+ * @param {number} bits - The bits to get bits from
+ * @returns {number} - The found bits
+ */
+export const getBits = (bits: number): number => {
+  return (2 ** bits) - 1;
+};