Implement jQuery

$('.class').add('asdasd').css('background-color:black');

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Implement Promise polyfill

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Implement Promise.all

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What will be the output?

var constant = "outside"

function log(){
    console.log(constant);
    var constant = "inside";
}
console.log(constant)
log();

Implement add(1)(2)();

function add(input) {
	return function (anotherInput){
		console.log(typeof input)
		if(typeof input === 'number'){
			return add(input + anotherInput);
		} else {
			return input
		}
	}
}

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Tell the output

console.log(1)
setTimeout(()=>{
	console.log(2)
},0)
console.log(Promise.resolve(3))
console.log(4)