function User(name){ this.name=name; } let lisi=new User("lisi"); console.log(lisi);//User {name: 'lisi'} let hdcms={url:"hdcms.com"}; User.call(hdcms,"system"); console.log(hdcms);//{url: 'hdcms.com', name: 'system'}
function User(name){ this.name=name; } let lisi=new User("lisi"); console.log(lisi);//User {name: 'lisi'} let hdcms={url:"hdcms.com"}; User.call(hdcms,"system"); console.log(hdcms);//{url: 'hdcms.com', name: 'system'}