Imagine that we are writing a User class in JavaScript:
function User()
{
var name;
var age;
}
User.prototype.outputInfo = function()
{
var el = document.createElement("div");
el.innerHTML = this.name+"("+ this.age+")";
document.body.appendChild(el);
}Now, if we want to use this class from our haXe application, then we have to write the corresponding extern class as follows:
extern class User
{
public var name:String;
public var age:Int;
public function outputInfo():Void;
public function new():Void;
}There are several things that you should note:
We have written an extern class, explaining to the compiler that the User class exists outside our code and can be used from it.