function Animal(color){ this.color = color } Animal.prototype.move = function(){} // 动物可以动 function Dog(color, name){ Animal.call(this, color) // 或者 Animal.apply(this, arguments) this.name = name } // 下面三行实现 Dog.prototype.__proto__ = Animal.prototype function temp(){} temp.prototye = Animal.prototype Dog.prototype = new temp()
Dog.prototype.constuctor = Dog // 这行看不懂就算了 Dog.prototype.say = function(){ console.log('汪')}
var dog = new Dog('黄色','阿黄')
用 class 就简单了
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class Animal{ constructor(color){ this.color = color } move(){} } class Dog extends Animal{ constructor(color, name){ super(color) this.name = name } say(){} }