ES5 继承

1. 首先要明白Object.create的作用

var obj1 = {name:'one'};
var obj2 = Object.create(obj1);

创建一个对象并且将obj2的__proto__指向obj1,即是做了一下两步操作：

var obj2={};
obj2.__proto__=obj1;

2. 比较好的继承方式(下面的代码不是很理解)

var Animal = (function () {
    function MyConstructor(name) {
        this.name = name;
    }
MyConstructor.prototype.speak = function speak() {
    console.log(this.name + ' makes a noise.');
}

return MyConstructor;
})();
var animal = new Animal('animal');

animal.speak();
var Lion = (function () {

function MyConstructor(name) {

Animal.call(this,name);

}
MyConstructor.prototype = Object.create(Animal.prototype);
MyConstructor.prototype.constructor = Animal;
MyConstructor.prototype.speak = function speak() {
    Animal.prototype.speak.call(this);
    console.log(this.name + ' roars ');
}

return MyConstructor;
})();
var lion = new Lion('Simba');

lion.speak(); // Simba makes a noise.

（编辑：李大同）

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