pmeenan

Priority Hints is rolling out to Chrome in the 101 release which is currently available in the Dev/Beta channel of Chrome and available in WebPageTest when using the Chrome Canary browser selection.

To make it easier to experiment with priority hints (particularly for LCP images) without making production changes, I set up a couple of public Cloudflare Workers that can be used dynamically with WebPageTest to inject priority hints into existing pages and to preload arbitrary images when combined with WebPageTest's overrideHost script command.

Injecting Priority Hints

There is a cloudflare worker at hint.perf.workers.dev that will take a CSS selector from the x-hint HTTP header and add fetchpriority=high to any elements in the HTML that match the selector. The easiest way to experiment with this is to use Chrome's dev tools locally, identify the element that hosts the imag

rauschma

Cheat sheet: modules

Named exports, named imports, namespace imports

If we put export in front of a named entity inside a module, it becomes a named export of that module. All other entities are private to the module.

//===== lib1.mjs =====
// Named exports

sindresorhus

Pure ESM package

The package that linked you here is now pure ESM. It cannot be require()'d from CommonJS.

This means you have the following choices:

1. Use ESM yourself. (preferred)
   Use import foo from 'foo' instead of const foo = require('foo') to import the package. You also need to put "type": "module" in your package.json and more. Follow the below guide.
2. If the package is used in an async context, you could use await import(…) from CommonJS instead of require(…).
3. Stay on the existing version of the package until you can move to ESM.

jakedohm

<script>
import { usePersistedRef } from "./usePersistentRef";

export default {
  setup() {
    const name = usePersistedRef('name', 'Jake Dohm')
  }
}
</script>

pedrouid

Web Cryptography API Examples

Live Table: https://diafygi.github.io/webcrypto-examples/

I couldn't find anywhere that had clear examples of WebCryptoAPI, so I wrote examples and made a live table with them. Pull requests welcome!

1. RSASSA-PKCS1-v1_5

• generateKey | importKey |

jmblog

// https://www.netlify.com/blog/2017/07/18/http/2-server-push-on-netlify/

const debug = require('debug')('nuxt:netlify-http2-server-push');
const path = require('path');
const glob = require('glob');
const fs = require('fs');

module.exports = function module(moduleOptions) {
  // This module is only enabled on production builds
  if (this.options.dev) {

addyosmani

Workbox runtime caching recipes

Your Service Worker script will need to import in Workbox and initialize it before calling any of the routes documented in this write-up, similar to the below:

importScripts('workbox-sw.prod.v1.3.0.js');
const workbox = new WorkboxSW();

// Placeholder array populated automatically by workboxBuild.injectManifest()

JamieMason

const isWalkable = value => value !== null && typeof value !== 'undefined';
const getChild = (parent, child) => (isWalkable(parent) ? parent[child] : undefined);
const getIn = (descendants, origin) => descendants.split('.').reduce(getChild, origin);

pierremonico

[Desktop Entry]
Encoding=UTF-8
Name=Postman
Exec=postman
Icon=/opt/Postman/resources/app/assets/icon.png
Terminal=false
Type=Application
Categories=Development;

daliborgogic

'use strict'

const timeout = ms => new Promise(res => setTimeout(res, ms))

function convinceMe (convince) {
  let unixTime = Math.round(+new Date() / 1000)
  console.log(`Delay ${convince} at ${unixTime}`)
}

async function delay () {