addyosmani

CSS Layout Debugger

A tweet-sized debugger for visualizing your CSS layouts. Outlines every DOM element on your page a random (valid) CSS hex color.

One-line version to paste in your DevTools

Use $$ if your browser aliases it:

~ 108 byte version

jlongster

// Have some complicated non-React widgets that manipulate DOM?
// Do they manage a list of DOM elements? Here's how to wrap it
// into a React component so you can "constantly rerender" it.

// A dumb non-react widget that manually manage some DOM node that
// represent a list of items
function NonReactWidget(node) {
  this.node = node;
}

pepelsbey

System

1. Set up iCloud Keychain
2. Remove icons and hide Dock
3. Default address in iMessage
4. Install Updates
5. Add Ru Input Sources
6. Set up Shortcuts
7. Add text shortcuts Text
   • egm [email protected]

paulirish

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

paullewis

/*!
 * Copyright 2015 Google Inc. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software

rebcabin

/*
  Copyright 2016 Brian C. Beckman

  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

  http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software

Rich-Harris

Stuff I wish I'd known sooner about service workers

I recently had several days of extremely frustrating experiences with service workers. Here are a few things I've since learned which would have made my life much easier but which isn't particularly obvious from most of the blog posts and videos I've seen.

I'll add to this list over time – suggested additions welcome in the comments or via twitter.com/rich_harris.

Use Canary for development instead of Chrome stable

Chrome 51 has some pretty wild behaviour related to console.log in service workers. Canary doesn't, and it has a load of really good service worker related stuff in devtools.

dfrankland

body {
    background-image:
      linear-gradient(45deg, #ccc 25%, transparent 25%), 
      linear-gradient(135deg, #ccc 25%, transparent 25%),
      linear-gradient(45deg, transparent 75%, #ccc 75%),
      linear-gradient(135deg, transparent 75%, #ccc 75%);
    background-size:25px 25px; /* Must be a square */
    background-position:0 0, 12.5px 0, 12.5px -12.5px, 0px 12.5px; /* Must be half of one side of the square */
}

icebob

var webpack = require('webpack');
var path = require('path');
var fs = require('fs');

var nodeModules = {};
fs.readdirSync('node_modules')
	.filter(function(x) {
		return ['.bin'].indexOf(x) === -1;
	})
	.forEach(function(mod) {

xgrommx

A series of reading lists mostly related to functional programming.