bvaughn

React recently introduced an experimental profiler API. This page gives instructions on how to use this API in a production release of your app.

Table of Contents

• Profiling in production
  • Create React App
  • Webpack 4

Profiling in production

React DOM automatically supports profiling in development mode for v16.5+, but since profiling adds some small additional overhead it is opt-in for production mode. This gist explains how to opt-in.

JeOam

Update: https://www.cyanhall.com/posts/notes/7.homebrew-cheatsheet/#java

on El Capitan, after installing the brew...

$ brew update
$ brew tap caskroom/cask
$ brew install Caskroom/cask/java

And Java 8 will be installed at /Library/Java/JavaVirtualMachines/jdk1.8.xxx.jdk/

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

dbrockman

const encode_regex = /[\+=\/]/g;
const decode_regex = /[\._\-]/g;

// Buffer -> Base64 String -> Url Safe Base64 String
export function encode(buffer) {
  return buffer.toString('base64').replace(encode_regex, encodeChar);
}

// Url Safe Base64 String -> Base64 String -> Buffer
export function decode(string) {

PurpleBooth

Project Title

One Paragraph of project description goes here

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

ryantbd

# Most part of this file is created by https://www.gitignore.io

### Node ###
# Logs
logs
*.log

# Runtime data
pids
*.pid

un33k

server {
    listen *:80;
    server_name www.example.com;
    rewrite ^(.*) http://example.com $1 permanent;
}

server {
    listen *:80;
    server_name example.com;

jordelver

Set the Mac OS X SOCKS proxy on the command line

a.k.a. what to do when your ISP starts blocking sites :(

Set the SOCKS proxy to local SSH tunnel

networksetup -setsocksfirewallproxy "Ethernet" localhost 8080

To clear the domain and port

jlong

var parser = document.createElement('a');
parser.href = "http://example.com:3000/pathname/?search=test#hash";

parser.protocol; // => "http:"
parser.hostname; // => "example.com"
parser.port;     // => "3000"
parser.pathname; // => "/pathname/"
parser.search;   // => "?search=test"
parser.hash;     // => "#hash"
parser.host;     // => "example.com:3000"