js设计模式(1)

<script type="text/javascript">

//形式一：

/* Anim class. */

var Anim = function() { };

Anim.prototype.start = function() { };

Anim.prototype.stop = function() { };

/* Usage. */

var myAnim = new Anim();

myAnim.start();

myAnim.stop();

//形式二：

/* Anim class, with a slightly different syntax for declaring methods. */

var Anim = function() { };

Anim.prototype = {

start: function() { },

stop: function() { }

};

//形式3:

/* Add a method to the Function object that can be used to declare methods. */

Function.prototype.method = function(name, fn) {

this.prototype[name] = fn;

};

/* Anim class, with methods created using a convenience method. */

var Anim = function() { };

Anim.method('start', function() { });

Anim.method('stop', function() { });

//形式4：

/* This version allows the calls to be chained. */

Function.prototype.method = function(name, fn) {

this.prototype[name] = fn;

return this;

};

/* Anim class, with methods created using a convenience method and chaining. */

var Anim = function() { };

Anim.method('start', function() { }).method('stop', function() { });

//形式5：

/* Start and stop animations using functions. */

function startAnimation() { }

function stopAnimation() { }

</script>