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CSS Base

Vendor Prefixing

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              // Double exclamation to boolean a value
var foo = 0;

// Converting arguments object to an array
(function() {
	console.log(arguments instanceof Array);
	var args1 = Array.prototype.slice.call(arguments);
	var args2 = [].slice.call(arguments);
	// or ES6
	const args3 = Array.from(arguments);
	const args4 = [...arguments];
	console.log(args1 instanceof Array, args2 instanceof Array, args3 instanceof Array, args4 instanceof Array);

// Assigning default values
function bar(opts) {
  var msg = opts.message || 'Hello world!';

// Checking value by two conditions without conditionals
function isAdult(age) {
   return age && age > 17 ;

// Converting to array
var value = "Test";
var totallyArray = [].concat(value);

// Converting strings to numbers
var newNumber = +'12.2';

// Use tilde to check if element is present in array
// (tilde returns -(N+1))
if (~[1, 2, 3].indexOf(2)) console.log('includes');

// Writing multi-line strings with .join()
var multiStr = [
  "This is the first line",
  "This is the second line",
  "This is more..."

// Looping through an array without condition parameter (if order is not important)
var arr = ["one", "two", "three"]
for (var i = arr.length; i--;) {

// Use setTimeout with 0 to schedule a function to run after the current event loop tick
setTimeout(function() {
  console.log("log message from next tick");
}, 0);
console.log("Hello World 1")
console.log("Hello World 2")

// Use void 0 instead of undefined
console.log(void 0);
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