javascript命名空间

js

第一种写法：

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(function(window) {
	function fn1() {
		alert(1)
	};

	function fn2() {
		alert(2)
	};

	window.app = {};
	app.fn1 = fn1;
	app.fn2 = fn2;

}(window))

app.fn1();
app.fn2();

第二种写法：

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(function(window) {
	function fn1() {
		alert(1)
	};

	function fn2() {
		alert(2)
	};

	window.app = {
		fn1:fn1,
		fn2:fn2,
	};

}(window))

app.fn1();
app.fn2();

小例子：

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(function(window) {
	function sums(a,b) {
		return a+b;
	};

	window.app = {
		sums:sums,
	};

}(window))
var add=app.sums(2,3);
alert(add);