JS实现链式调用

 可用链式方法实现四则运算

/* 简单的链式调用 类实现*/
class Person{
    constructor(){
        this.name = ''
    }
    setName(name) {
        this.name = name
        return this
    }
    getName() {
        console.log('name:==',this.name)
    }
}

const person = new Person()
person.setName('zx').getName()

/*函数实现*/
function Person() {
    this.name = ''
}
Person.prototype = {
    setName: function(name) {
        this.name = name
        return this
    },
    getName: function() {
        console.log('name:==',this.name)
    }
}
const person = new Person()
person.setName('zx').getName()