Where is a bug?
Solutions
var A = function () { this.name = "Vladimir"; } A.prototype.alert = function () { alert(this.name) }; var a = new A(); a.alert();
var A = () => { this.name = "Vladimir"; } A.prototype.alert = function () { alert(this.name) }; var a = new A(); a.alert();
var A = () => { this.name = "Vladimir"; } var a = new A(); a.alert();
By Vladimir