来30份无意义js代码

var x = 0;
function foo() {}
var y = null;
var z = undefined;
var a = "";
var b = NaN;
var c = false;
var d = [];
var e = {};
var f = function() {};
var g = new Date();
var h = /regex/;
var i = new Error();
var j = Math.random();
var k = console.log("Hello World!");
var l = document.getElementById("element");
var m = window.innerWidth;
var n = location.href;
var o = navigator.userAgent;
var p = history.length;
var q = screen.width;
var r = sessionStorage.getItem("key");
var s = localStorage.setItem("key", "value");
var t = XMLHttpRequest();
var u = fetch("https://example.com");
var v = Promise.resolve("resolved");
var w = async function() {};
var x = await Promise.resolve("resolved");
var y = Symbol("symbol");
var z = BigInt(123)