JSFiddle - React, Tailwind, and code Playground

by BurpmanJunior

JavaScript

function leftPad(a, b, c){
	if(!c && c !== 0){ c = ' '; }
	var a = a.toString(), c = c.toString(), i = -1, n = b - a.length;
  while(i++ < n){ a = c + a; }
  return a;
}

document.body.appendChild((
	function(){
  	var b=12345,
    		a=(function(){
        	return document.createElement('p');
        })();
   	a.innerHTML=b;
    return a;
  }
)());

document.body.appendChild((function(){
	var b=leftPad(12345, 12, 0),
  a=(function(){
  	return document.createElement('p');
  })();
  a.innerHTML=b;
  return a;
})());