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add namespace · fyuxiang/javascript@88ef4b2 · GitHub

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  2. javascript

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Commit 88ef4b2

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wchaowu
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add namespace
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‎README.md‎

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4.
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<a href="https://github.com/wchaowu/javascript-code/blob/master/javascript-based/event.html">
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JavaScript 事件</a> <br />
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5.<a href="https://github.com/wchaowu/javascript-code/tree/master/javascript-based/crossDomain.html">javascript 跨域</a> <br />
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5.<a href="https://github.com/wchaowu/javascript-code/tree/master/javascript-based/crossDomain.html">javascript 跨域</a> <br />
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6.<a href="https://github.com/wchaowu/javascript-code/tree/master/javascript-based/namespace">javascript 命名空间</a> <br />
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<h3 name="OjectOriented">Oject-Oriented</h3>
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1.<a href="https://github.com/wchaowu/javascript-code/tree/master/object-oriented/Expressive-JavaScript">JavaScript Expressive </a> <br />

‎javascript-based/namespace/README.md‎

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<h3>javascript命名空间</h3>
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----------
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几乎所有重要的 Javascript 程序中都会用到命名空间。除非我们只是编写简单的代码，否则尽力确保正确地实现命名空间是很有必要的。这也能避免自己的代码收到第三方代码的污染。本小节将阐述以下设计模式
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---------------------------
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>单一全局变量
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>
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>对象序列化的表示
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>
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>命名空间注入
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>
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>即时调用的函数表达式
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>
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>内嵌的命名空间
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>
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>嵌套空间
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‎javascript-based/namespace/namespace.HTML‎

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<title> 命名空间的注入 </title>
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<meta name="Generator" content="Vbooking System">
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<meta name="Author" content="cwwu">
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<meta name="Keywords" content="">
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<meta name="Description" content="">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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</head>
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<body>
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<script type="text/javascript">
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var myApp = myApp || {};
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myApp.utils = {};
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(function () {
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var val = 5;
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this.getValue = function () {
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return val;
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};
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this.setValue = function( newVal ) {
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val = newVal;
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}
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// also introduce a new sub-namespace
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this.tools = {};
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}).apply( myApp.utils );
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// inject new behaviour into the tools namespace
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// which we defined via the utilities module
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(function () {
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this.diagnose = function(){
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return "diagnosis";
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}
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}).apply( myApp.utils.tools );
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// note, this same approach to extension could be applied
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// to a regular IIFE, by just passing in the context as
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// an argument and modifying the context rather than just
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// "this"
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// Usage:
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// Outputs our populated namespace
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console.log(myApp);
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// Outputs: 5
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console.log( myApp.utils.getValue());
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// Sets the value of `val` and returns it
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myApp.utils.setValue( 25 );
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console.log(myApp.utils.getValue());
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// Testing another level down
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console.log( myApp.utils.tools.diagnose() );
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</script>
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</body>
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</html>

‎javascript-based/namespace/namespace1.HTML‎

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<title> 自动嵌套命名空间 </title>
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<meta name="Generator" content="Vbooking System">
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<meta name="Author" content="">
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<meta name="Keywords" content="">
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<meta name="Description" content="">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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</head>
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<body>
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单一全局变量
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<script type="text/javascript">
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var myApplication = (function () {
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function(){
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//...
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},
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return{
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//...
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}
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})();
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</script>
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前缀命名空间
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<script type="text/javascript">
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var myApplication_propertyA = {};
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var myApplication_propertyB = {};
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function myApplication_myMethod(){
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//...
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}
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</script>
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我们就简单的介绍过IIFE (即时调用的函数表达式) ，它是一个未命名的函数，在它被定义之后就会立即执行。
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如果听起来觉得耳熟，是因为你以前遇到过并将它称之为自动生效的（或者自动调用的）匿名函数，然而我个人更认为 Ben Alman的 IIFE 命名更准确。在JavaScript中，因为在一个作用域中显示定义的变量和函数只能在作用域中可见，
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函数调用为实现隐私提供了简单的方式。
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<script type="text/javascript">
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// an (anonymous) immediately-invoked function expression
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(function () { /*...*/})();
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// a named immediately-invoked function expression
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(function foobar () { /*..*/}());
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// this is technically a self-executing function which is quite different
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function foobar () { foobar(); }
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</script>
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嵌套命名空间
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<script type="text/javascript">
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var application = {
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utilities:{
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drawing:{
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canvas:{
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2d:{
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//...
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}
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}
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}
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}
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};
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</script>
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</body>
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</html>

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