Eric Fuller efuller

Common symbols

Modifiers

When a key combination is displayed, the modifiers are written in the order presented here. For example, Control + Option + Shift + Command + Q would be written as ⌃⌥⇧⌘Q.

Sym	Key	Alt
⌃	Control
⌥	Option

Testing double-fetching of `module`/`nomodule` JS code (including the Safari hack)

<script type="module" src="module.js"></script>
<script nomodule src="nomodule.js"></script>

Update September 2020: life's almost good. Edge Chromium is widely rolled out, and Safari 14.0 ships soon with a fix.

Test page: https://jg-testpage.github.io/es-modules/module-nomodule/

Jest Testing Examples

Common Use Cases
Check if an Object contains multiple keys

Increase key repeat rate on macOS

Settings: System Preferences » Keyboard » Key Repeat/Delay Until Repeat

Use the commands below to increase the key repeat rate on macOS beyond the possible settings via the user interface. The changes aren't applied until you restart your computer.

Source: https://apple.stackexchange.com/a/83923

	import {SetStateAction, useCallback} from 'react';
	import {create} from "zustand";

	export type EqualityFn<T> = (left: T \| null \| undefined, right: T \| null \| undefined) => boolean;

	export type StoreType<State> = {
	use<K extends keyof State>(
	key: K,
	defaultValue?: State[K],
	equalityFn?: EqualityFn<State[K]>,

	(cors) {
	@cors_preflight{args.0} method OPTIONS
	@cors{args.0} header Origin {args.0}

	handle @cors_preflight{args.0} {
	header {
	Access-Control-Allow-Origin "{args.0}"
	Access-Control-Allow-Methods "GET, POST, PUT, PATCH, DELETE, OPTIONS"
	Access-Control-Allow-Headers *
	Access-Control-Max-Age "3600"

	// create context with no upfront defaultValue
	// without having to do undefined check all the time
	function createCtx<A>() {
	const ctx = React.createContext<A \| undefined>(undefined)
	function useCtx() {
	const c = React.useContext(ctx)
	if (!c) throw new Error("useCtx must be inside a Provider with a value")
	return c
	}
	return [useCtx, ctx.Provider] as const

	<?php

	/**
	* Register custom rest fields
	*/
	add_action( 'rest_api_init', 'register_custom_fields' );

	/**
	* Register rest fields and endpoint
	*

	function Mutilator(data, name, context) {
	this.n = name \|\| `mutilation-${+new Date()}`;
	this.d = data;
	this.c = context \|\| window;
	this.isArr = function(p) {
	return this.d[p].constructor == Array;
	};
	this.dispatch = function(p, v, t) {
	this.c.dispatchEvent(
	new CustomEvent(this.n, {