[Javascript] Is it possible to nest method 'alert' into custom function?

Question

function funcOutput (z, u) {
this.z=z;
this.u=u;
var z = prompt ("Welcome! Please enter your name.");
var u = prompt ("Thank you, "+z+"! Please, tell us. Are you our friend or enemy?")
}

Error: z is not defined.
https://code.sololearn.com/WaQ66TA850ts/?ref=app

Answer 1

Seven Five You could override the build in alert with your own custom alert.

window.alert = function (message) {
return yourCustomAlert(message);
}

Check out the example

https://code.sololearn.com/WL62eN6G51Zr/?ref=app

Answer 2

Seven Five if you are having problem of long code then just write

var z= prompt ("Welcome! please enter your name");

alert("Thank you:" + z+"please tell us. Are you our friend or enemy? )

Answer 3

Alert is a method of Window object, right? Is it somehow connected with the error?

upd.: Thx for answers, custom alert sounds good. Does anyone knows if it's allowed to use alert method in function without custom alert?