SOURCE

function Zb(){
    constructor:{
        this.name='zhoubin',
        this.age=age
    }
    function age(){
        return arguments[0]
    }
}
const zhou = new Zb(18)
zhou.age()
console.log(zhou,zhou.age(18))
const obj={
    a:1,
    a:2
}
console.log(obj)