hhy5277 / observejs

observe any object's any change

##observe.js

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:)

你可以移步 Nuclear 感受observe.js在框架里不可替代的作用。

##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

This content is released under the (http://opensource.org/licenses/MIT) MIT License.