bendc

// array utils
// =================================================================================================

const combine = (...arrays) => [].concat(...arrays);

const compact = arr => arr.filter(Boolean);

const contains = (() => Array.prototype.includes
  ? (arr, value) => arr.includes(value)
  : (arr, value) => arr.some(el => el === value)

rondy

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

---

Effective Engineer - Notes

• By Edmond Lau
• Highly Recommended 👍
• http://www.theeffectiveengineer.com/

What's an Effective Engineer?

n1ru4l

export const fetchAsBlob = url => fetch(url)
    .then(response => response.blob());

export const convertBlobToBase64 = blob => new Promise((resolve, reject) => {
    const reader = new FileReader;
    reader.onerror = reject;
    reader.onload = () => {
        resolve(reader.result);
    };
    reader.readAsDataURL(blob);

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()

addyosmani

// Examples at https://gist.github.com/bendc/9b05735dfa6966859025#gistcomment-1370485


// array utils
// =================================================================================================

const combine = (...arrays) => [].concat(...arrays);

const compact = arr => arr.filter(Boolean);

addyosmani

• Web Page Usability Matters
• PageSpeed Insights w/Lighthouse and Chrome User Experience Report
• Data Saver for Chrome on Android - enable and then look at about:flags for Lite Pages and other interventions
• web.dev/fast - code-labs and tooling for optimizing performance
• Lighthousebot for using Lighthouse in continuous integration
• Bundlesize for JavaScript budgets in CI
• Start performance budgeting

gaearon

If you use server rendering, keep in mind that neither useLayoutEffect nor useEffect can run until the JavaScript is downloaded.

You might see a warning if you try to useLayoutEffect on the server. Here's two common ways to fix it.

Option 1: Convert to useEffect

If this effect isn't important for first render (i.e. if the UI still looks valid before it runs), then useEffect instead.

function MyComponent() {

anton-karlovskiy

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()

anton-karlovskiy

// RE: https://github.com/sindresorhus/query-string
// RE: https://bundlephobia.com/result?p=query-string@6.13.1

// RE: https://github.com/unshiftio/querystringify
// RE: https://github.com/Gozala/querystring

const serializeToQueryParams = (queryObject, prefix = '') => {
  const queryString = [];
  for (const key in queryObject)
    if (queryObject.hasOwnProperty(key)) {

anton-karlovskiy

Re: selfies project written in CRA and PWA

• Planning of a project

  • The project planning is mostly based on Fullstack Project Planning.

    For most of my projects, especially recently, I've been following a planning process that helps me breakdown the project into component parts that help me build more efficiently.

• React Project Structure

  • The project structure is mostly based on React Project Structure Best Practices for Scalable Application.

    A react project structure or architecture plays an important role in project maintenance. A good folder structure will help developers in the team easy to locate and easy to relate (ELER).