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目前只有 FireFox 支持，新版 Opera 启用 Webkit 内核之后已经不再支持。

<meta name="apple-itunes-app" content="app-id=xxxxx" />

app-id 为 app id number

更多信息参考：[http://developer.apple.com/library/ios/#documentation/AppleApplications/Reference/SafariWebContent/PromotingAppswithAppBanners/PromotingAppswithAppBanners.html]

function fetchJSON(url) {
	return new Promise(function(resolve, reject) {
		var xhr = new XMLHttpRequest();
		xhr.open('GET', url);
		xhr.responseType = 'json';
		xhr.send();
		xhr.onload = function() {
			if(xhr.response) {
 resolve(xhr.response);

/Apache/conf/extra/httpd-vhosts.conf

<VirtualHost *:80>
    ServerAdmin [email protected]
    DocumentRoot "F:/xxx/xxx" <- code
    ServerName myhost.example.com
    ErrorLog "logs/myhost.example.comm-error.log"
    CustomLog "logs/myhost.example.com-access.log" common

// Install n from npm
$ sudo npm install -g n

// Install different version for Node.js
$ sudo n 0.12.0
$ sudo n 0.10.36

// Quickly switch between the Node.js version with the command n
$ n

群主分享了这么一段代码，应邀分析一下，以下是正文。

代码

new Array(101).join(' ').replace(/ /g,function(t,i){
    return i+1+' '
}).split(' ').reduce(function(n1,n2) {
    return (n1-0)+(n2-0)
});

dependencies

npm install webpack webpack-cli webpack-dev-server @babel/core @babel/preset-env
@babel/preset-react babel-loader css-loader mini-css-extract-plugin css-hot-loader --save-dev --verbose

npm install react react-dom redux react-redux --save --verbose

.babelrc

	(function() {

	var ua = /iPhone\|iP[oa]d/.test(navigator.userAgent) ? 'iOS' : /Android/.test(navigator.userAgent) ? 'Android' : 'PC';

	document.addEventListener('DOMContentLoaded', function(event) {

	if(ua === 'PC') {
	return;
	}

	function deepClone(target) {

	if(typeof target !== 'object') {
	return target;
	}
	if(target.constructor === RegExp) {
	return target;
	}

	var result = new target.constructor();

	<style>
	@media (min-device-width:600px) {
	img[data-src-600px] {
	content: attr(data-src-600px, url);
	}
	}

	@media (min-device-width:800px) {
	img[data-src-800px] {
	content: attr(data-src-800px, url);