| echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bashrc | |
| . ~/.bashrc | |
| mkdir ~/local | |
| mkdir ~/node-latest-install | |
| cd ~/node-latest-install | |
| curl http://nodejs.org/dist/node-latest.tar.gz | tar xz --strip-components=1 | |
| ./configure --prefix=~/local | |
| make install # ok, fine, this step probably takes more than 30 seconds... | |
| curl https://www.npmjs.org/install.sh | sh |
This article has been given a more permanent home on my blog. Also, since it was first written, the development of the Promises/A+ specification has made the original emphasis on Promises/A seem somewhat outdated.
Promises are a software abstraction that makes working with asynchronous operations much more pleasant. In the most basic definition, your code will move from continuation-passing style:
getTweetsFor("domenic", function (err, results) {
// the rest of your code goes here.
There was a [great article][1] about how react implements it's virtual DOM. There are some really interesting ideas in there but they are deeply buried in the implementation of the React framework.
However, it's possible to implement just the virtual DOM and diff algorithm on it's own as a set of independent modules.
| var INPUT_TYPES = 'color|date|datetime|datetime-local|file|month|number|password|range|search|tel|text|time|url|week'.split('|') | |
| var App = React.createClass({ | |
| getInitialState: function() { | |
| return {} | |
| }, | |
| onChange: handleFormInputChange, | |
| render: function() { |
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.
elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"> | |
| <title>Auto play html audio in iOS WeChat InAppBrowser the right way</title> | |
| </head> | |
| <body> | |
| <h1>在 iOS 微信浏览器中自动播放 HTML5 audio(音乐) 的正确方式</h1> | |
| <p>核心原理: 在微信的JS-API 中 play 一下 audio 即可达到自动播放的目的(应该是微信自己做了处理)</p> |
| #!/bin/bash | |
| # update_gfwlist.sh | |
| # Author : VincentSit | |
| # Copyright (c) http://xuexuefeng.com | |
| # | |
| # Example usage | |
| # | |
| # ./whatever-you-name-this.sh | |
| # | |
| # Task Scheduling (Optional) |