JSFiddle - React, Tailwind, and code Playground

by ozzymcduff

JavaScript

console.log(Object.prototype.toString.call(undefined));
console.log(Object.prototype.toString.call(null));
console.log(Object.prototype.toString.call([]));
console.log(Object.prototype.toString.call({}));

console.log(typeof undefined);
console.log(typeof null);
console.log(typeof []);
console.log(typeof {});
console.log('test' in {'test':undefined});
console.log('test' in {'test':null});
console.log({'test':null}.tvar ===undefined);

(function(global,undefined){
    console.log(global);
    console.log(undefined);
})(document);
console.log(document);
console.log(undefined);
var x;
console.log(x);