ryanflorence

Reach UI Philosophy

Reach UI is an accessible foundation for React applications and design systems.

The three equally important goals are to be:

• Accessible
• Composable
• Stylable

ireade

self.addEventListener('install', (e) => {
    e.waitUntil(
        caches.open("precache").then((cache) => cache.add("/broken.png"))
    );
});

function isImage(fetchRequest) {
    return fetchRequest.method === "GET" && fetchRequest.destination === "image";
}

DavidKuennen

(function (context, trackingId, options) {
    const history = context.history;
    const doc = document;
    const nav = navigator || {};
    const storage = localStorage;
    const encode = encodeURIComponent;
    const pushState = history.pushState;
    const typeException = 'exception';
    const generateId = () => Math.random().toString(36);
    const getId = () => {

robmathers

var groupBy = function(data, key) { // `data` is an array of objects, `key` is the key (or property accessor) to group by
  // reduce runs this anonymous function on each element of `data` (the `item` parameter,
  // returning the `storage` parameter at the end
  return data.reduce(function(storage, item) {
    // get the first instance of the key by which we're grouping
    var group = item[key];
    
    // set `storage` for this instance of group to the outer scope (if not empty) or initialize it
    storage[group] = storage[group] || [];
    

pacdiv

'use strict';

const characters = [
  { name: 'ironman', env: 'marvel' },
  { name: 'black_widow', env: 'marvel' },
  { name: 'wonder_woman', env: 'dc_comics' },
];

console.log(
  characters

aparrish

ljharb

Array Iteration

https://gist.github.com/ljharb/58faf1cfcb4e6808f74aae4ef7944cff

While attempting to explain JavaScript's reduce method on arrays, conceptually, I came up with the following - hopefully it's helpful; happy to tweak it if anyone has suggestions.

Intro

JavaScript Arrays have lots of built in methods on their prototype. Some of them mutate - ie, they change the underlying array in-place. Luckily, most of them do not - they instead return an entirely distinct array. Since arrays are conceptually a contiguous list of items, it helps code clarity and maintainability a lot to be able to operate on them in a "functional" way. (I'll also insist on referring to an array as a "list" - although in some languages, List is a native data type, in JS and this post, I'm referring to the concept. Everywhere I use the word "list" you can assume I'm talking about a JS Array) This means, to perform a single operation on the list as a whole ("atomically"), and to return a new list - thus making it mu

ericelliott

<script src="/upup.min.js"></script>
<script>
  UpUp.start({
    'content-url': 'schedule.html?user=joe', // show this when the user is offline
    'assets': [                 // define additional assets needed while offline:
      'img/logo.png',           // such as images,
      'css/offline.css',        // custom stylesheets,
      'schedule.json?user=joe', // dynamic requests with data per user,
      'js/angular.min.js',      // javascript libraries and frameworks,
      'mov/intro.mp4',          // videos,

ericelliott

{
  "name": "My Progressive Web Application",
  "short_name": "Progressive",
  "start_url": "/?home=true",
  "icons": [
    {
      "src": "/icons/icon36.png",
      "sizes": "36x36",
      "type": "image/png"
    },

bdchauvette

{
  "presets": [ "es2015" ]
}