MikeDigitize

var Timer = wait => new Promise(resolve => setTimeout(resolve, wait));
Timer(2000).then(() => console.log('done'));

MikeDigitize

// write a function that returns the sum of two numbers
// then modify it to...
// return the sum of three numbers
// then the first argument is an array of numbers
// then the first argument may or may not be an array
// then there are an unknown amount of numbers and arrays passed in

function add(...nums) {
    return nums.reduce((a,b) => a.concat(b), []).reduce((a,b) => a+b, 0);
}

MikeDigitize

<button id="btn">Click Me</button>

<select>
	<option>Option 1</option>
	<option>Option 2</option>
	<option>Option 3</option>
</select>

<button id="select">Select</button>

MikeDigitize

export function scrollToElement(scrollAmount = 20) {

    let findPos = (el, elPos = 0) => {
        if (el.offsetParent) {
            do {
                elPos += el.offsetTop;
            } while (el = el.offsetParent);
        }
        return elPos;
    };

MikeDigitize

var $date = function() {
 
    function getDaysInMonths(m, y) {
        return /8|3|5|10/.test(--m) ? 30 : m == 1 ? (!(y % 4) && y % 100) || !(y % 400) ? 29 : 28 : 31;
    }

    function isLeapYear(y) {
	return getDaysInMonths(2, y) === 29;
    }