require.js遵循AMD规范，通过define定义模块，require异步加载模块,一个js文件即一个模块。
一、模块加载require
1.加载符合AMD规范模块
HTML:
<script src="js/require.js" data-main="js/main"></script>
MAIN.JS
require.config({
baseUrl: "js/lib",
paths: {
"jquery": "jquery.min"
}
});
require(['jquery'], function ($){
// some code here
});
2.加载不符合AMD规范模块
require.config({
shim: {
'underscore':{
exports: '_'
},
'backbone': {
deps: ['underscore', 'jquery'],
exports: 'Backbone'
}
}
});
二、模块定义define
define(['math', 'graph'],
function ( math, graph ) {
return {
plot: function(x, y){
return graph.drawPie(math.randomGrid(x,y));
}
}
};
);
三、require+jquery+domready
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<script src="js/require.js"></script>
</head>
<body>
<div id="333">123124</div>
<script>
require.config({
paths: {"jquery": "js/lib/jquery-1.11.1.min",
"domReady": "js/lib/domReady"
}
}); require(["domReady!", "jquery"], function() {
//alert('22')
change();
}); function change(){
$('#333').text('5555');
}
</script> </body>
</html>
原文地址：
http://javascript.ruanyifeng.com/tool/requirejs.html
http://www.ruanyifeng.com/blog/2012/11/require_js.html