JSFiddle - React, Tailwind, and code Playground

by Chuan Shao

JavaScript

console.log("3" === 3);//false
console.log(NaN === NaN);//false
var a = {x:1, y:2};
var b = {x:1, y:2};
var c = a;
console.log(a === b);//false
console.log(a === c);//true
console.log(0 === -0);//true

console.log("3" == 3);//true
console.log(null == undefined);//true
console.log(true == 1);//true
console.log(true == 9);//false

console.log([9] == 9);//true
console.log([9] == "9");//true

var d = new Date();
var s = d.toString();
var n = d.valueOf();
console.log(d == s);//true
console.log(d == n);//false