代码实操：一文讲解js继承的多种实现方式

function Parent () {
    this.name = 'huang';
}

Parent.prototype.getName = function () {
    console.log(this.name);
}

function Child () {

}

Child.prototype = new Parent();

var child1 = new Child();

console.log(child1.getName()) // huang

function Parent () {
    this.names = ['huang', 'huang'];
}

function Child () {

}

Child.prototype = new Parent();

var child1 = new Child();

child1.names.push('test');

console.log(child1.names); // ["huang", "huang", "test"]

var child2 = new Child();

console.log(child2.names); // ["huang", "huang", "test"]

function Parent () {
    this.names = ['xianzao', 'zaoxian'];
}

function Child () {
    Parent.call(this);
}

var child1 = new Child();

child1.names.push('test');

console.log(child1.names); // ["xianzao", "zaoxian", "test"]

var child2 = new Child();

console.log(child2.names); // ["xianzao", "zaoxian"]

function Parent (name) {
    this.name = name;
}

function Child (name) {
    Parent.call(this, name);
}

var child1 = new Child('xianzao');

console.log(child1.name); // xianzao

var child2 = new Child('zaoxian');

console.log(child2.name); // zaoxian

function Parent (name) {
    this.name = name;
    this.colors = ['red', 'blue', 'green'];
}

Parent.prototype.getName = function () {
    console.log(this.name)
}

function Child (name, age) {

    Parent.call(this, name); // 构造器借用了
    
    this.age = age;

}

Child.prototype = new Parent(); // 原型链继承
Child.prototype.constructor = Child; // 将构造器引用指回来

var child1 = new Child('kevin', '18');

child1.colors.push('black');

console.log(child1.name); // kevin
console.log(child1.age); // 18
console.log(child1.colors); // ["red", "blue", "green", "black"]

var child2 = new Child('daisy', '20');

console.log(child2.name); // daisy
console.log(child2.age); // 20
console.log(child2.colors); // ["red", "blue", "green"]

function createObj(o) {
    function F(){}
    F.prototype = o;
    return new F();
}

var person = {
    name: 'kevin',
    friends: ['daisy', 'kelly']
}

var person1 = createObj(person);
var person2 = createObj(person);

person1.name = 'person1';
console.log(person2.name); // kevin

person1.friends.push('taylor');
console.log(person2.friends); // ["daisy", "kelly", "taylor"]

function createObj (o) {
    var clone = Object.create(o);
    clone.sayName = function () {
        console.log('hi');
    }
    return clone;
}