Skip to content

Instantly share code, notes, and snippets.

@Potherca
Potherca / README.md
Last active March 4, 2024 23:40
The search for a Regex to match BEM CSS class-names

The search for a Regex to match BEM CSS class-names

TL;DR

Use this regular expression to match BEM class-names:

^\.[a-z]([a-z0-9-]+)?(__([a-z0-9]+-?)+)?(--([a-z0-9]+-?)+){0,2}$
@tkrotoff
tkrotoff / FrontendFrameworksPopularity.md
Last active May 13, 2024 02:28
Front-end frameworks popularity (React, Vue, Angular and Svelte)
@Atinux
Atinux / async-foreach.js
Last active October 10, 2023 03:04
JavaScript: async/await with forEach()
const waitFor = (ms) => new Promise(r => setTimeout(r, ms))
const asyncForEach = async (array, callback) => {
for (let index = 0; index < array.length; index++) {
await callback(array[index], index, array)
}
}
const start = async () => {
await asyncForEach([1, 2, 3], async (num) => {
await waitFor(50)
@clarkbw
clarkbw / redux-performance-mark.js
Last active February 8, 2024 05:03
A User Timing middleware for redux to create performance markers for dispatched actions
const timing = store => next => action => {
performance.mark(`${action.type}_start`);
let result = next(action);
performance.mark(`${action.type}_end`);
performance.measure(
`${action.type}`,
`${action.type}_start`,
`${action.type}_end`
);
return result;
@fokusferit
fokusferit / enzyme_render_diffs.md
Last active April 15, 2024 09:41
Difference between Shallow, Mount and render of Enzyme

Shallow

Real unit test (isolation, no children render)

Simple shallow

Calls:

  • constructor
  • render
@bschwartz757
bschwartz757 / async.js
Last active November 15, 2023 03:23
Async/await function to fetch data from multiple URLs in parallel
/* Client side, works in Chrome 55 and Firefox 52 without transpilation */
//https://blogs.msdn.microsoft.com/typescript/2016/11/08/typescript-2-1-rc-better-inference-async-functions-and-more/
async function fetchURLs() {
try {
// Promise.all() lets us coalesce multiple promises into a single super-promise
var data = await Promise.all([
/* Alternatively store each in an array */
// var [x, y, z] = await Promise.all([
// parse results as json; fetch data response has several reader methods available:
//.arrayBuffer()
@sheharyarn
sheharyarn / request.js
Last active August 24, 2023 14:55
Axios Request Wrapper for React (https://to.shyr.io/axios-requests)
/**
* Axios Request Wrapper
* ---------------------
*
* @author Sheharyar Naseer (@sheharyarn)
* @license MIT
*
*/
import axios from 'axios'
@telekosmos
telekosmos / uniq.js
Last active November 15, 2022 17:13
Remove duplicates from js array (ES5/ES6)
var uniqueArray = function(arrArg) {
return arrArg.filter(function(elem, pos,arr) {
return arr.indexOf(elem) == pos;
});
};
var uniqEs6 = (arrArg) => {
return arrArg.filter((elem, pos, arr) => {
return arr.indexOf(elem) == pos;
});
@17twenty
17twenty / simple_git.md
Created September 27, 2013 18:32
A Simple Git branching model

a simple git branching model

This is a very simple git workflow. It (and variants) is in use by many people. I settled on it after using it very effectively at Athena. GitHub does something similar; Zach Holman mentioned it in this talk.

The gist

@PaulKinlan
PaulKinlan / criticalcss-bookmarklet-devtool-snippet.js
Last active April 2, 2024 02:45
CriticalCSS Bookmarklet and Devtool Snippet.js
(function() {
var CSSCriticalPath = function(w, d, opts) {
var opt = opts || {};
var css = {};
var pushCSS = function(r) {
if(!!css[r.selectorText] === false) css[r.selectorText] = {};
var styles = r.style.cssText.split(/;(?![A-Za-z0-9])/);
for(var i = 0; i < styles.length; i++) {
if(!!styles[i] === false) continue;
var pair = styles[i].split(": ");