How to overload constructor of an Object in JS (Javascript)?

Question

Can I do something like?:

function User(form) {
    this._username = form.username.value;
    this._password = form.password.value;
    this._surname = form.surn         


        

Answer 1

No you can't, JavaScript does not support overloading of any kind.

What you can do is either pass an object which has already been populated with the values into your constructor and then grab the values from the object, but this which duplicates code.

Or you can create a default constructor and add methods such as initFromUser or setFromForm which then take the respective parameters and setup the objects values, new User().initFormForm(form) looks pretty clean to me.