Answers for "add leading zeros in javascript"

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"

js number add zero before

('0' + 11).slice(-2) // '11'
('0' + 4).slice(-2)  // '04'

add leading zeros javascript

const str1 = '5';
console.log(str1.padStart(2, '0')); // expected output: "05"

js num to string with leading 0

String(<number>).padStart(<places>, '0')

String(42).padStart(5, '0'); 	// '00042'