observejs用于观察任意对象的任意变化的类库，以轻巧、实用、强大而闻名。
ps:源代码未压缩版仅仅只有158行代码:)
3分钟精通observe.js对象字面量var obj = { a: 1 };observe(obj, function (name, value , old) { console.log(name + "__" + value + "__" + old);});obj.a = 2; //a__2__1数组var arr = [1, 2, 3];observe(arr, function (name, value, old) { console.log(name + "__" + value+"__"+old);});arr.push(4);//Array-push__[1,2,3,4]__[1,2,3] arr[3] = 5;//3__5__4复杂对象var complexObj = { a: 1, b: 2, c: [{ d: [4] }] };observe(complexObj, function (name, value , old, path) { console.log(name + "__" + value + "__" + old); //d__100__4 console.log(path) //#-c-0});complexObj.c[0].d = 100;普通对象var User = function (name, age) { this.name = name; this.age = age; //只监听name observe(this,["name"] function (name, value, oldValue) { console.log(name + "__" + value + "__" + oldValue); });}var user = new User("lisi", 25);user.name = "wangwu";//name__wangwu__lisi user.age= 20; //什么都输出，因为没有监听age
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