JSFiddle - React, Tailwind, and code Playground

by Kevin Faulhaber

JavaScript

var f = function(){
    alert(this);
}
(function(){  
    window.a = 42;
    this.b = 42;
    self.c = 42;
    return d = 42;
})()

alert(a + ' ' + b + ' ' + c + ' ' + d );