继承的五种方式

1.混入式继承

var obj1 = {}
var obj2 = {
    name: 'ys',
    age: 18
}
for(var k in obj2){
    obj1[k] = obj2[k]
}

 

 

2.原型继承

// 方法一:
function Person() {
 
};
var obj1 = {}
var obj2 = {
    name: 'ys',
    age:18
}
obj2 = new Person
Person.prototype = obj2
 
 
// 方法二:
function Person() {
 
};
var obj1 = {}
var obj2 = {
    name: 'ys',
    age:18
}

for(var k in obj2){

    Person.prototype[k] = obj2[k]

}

 

 

 

3.经典继承

var obj1 = {}
var obj2 = {
    name: 'ys',
    age: 19
}
obj1 = Object.create(obj2)

 

 

4.es6 class extends继承

 
var obj1 = {}
var obj2 = {
    name: 'ys',
    age: 19
}
class obj1 extends obj2 {
    // 让obj1继承了obj2的属性和方法
}