David Taylor officialdavidtaylor

officialdavidtaylor / catchall map example.js

Last active April 2, 2025 22:19

A technique for constructing a JS map object with a default return value

	// example inspired by https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy

	const defaultKey = Symbol("default");

	// a benefit of keying with a Symbol is that it is not enumerable in a for...in iteration
	const map = {
	key1: "foo",
	key2: "bar",

	[defaultKey]: "baz",

officialdavidtaylor / useCurrentTime.ts

Created April 17, 2024 14:50

A React Custom Hook to opt the component (and all downstream components) into re-renders that occur on a specified interval.

	import { useRef, useState } from 'react';

	/**
	* This hook will opt your component (and all downstream components) into
	* rerenders that occur on the interval specified.
	*
	* ⚠️ This may induce serious performance consequences, especially when
	* choosing a shorter intervalDuration
	*
	* @param intervalDuration number (in ms), default to 1000ms