how to preserve leading zeros in javascript code example
Example 1: javascript remove leading zeros from string
use a regular expression like this
var strNumber = "0049";
console.log(typeof strNumber); //string
var number = strNumber.replace(/^0+/, '');
Example 2: javascript print int with leading zeros
function padLeadingZeros(num, size) {
var s = num+"";
while (s.length < size) s = "0" + s;
return s;
}
padLeadingZeros(57, 3);// "057"
padLeadingZeros(57, 4); //"0057"