JavaScript seconds to time string with format hh:mm:ss

Question

I want to convert a duration of time, i.e., number of seconds to colon-separated time string (hh:mm:ss)

I found some useful answers here but they all talk about conv

Answer 1

There's a new method for strings on the block: padStart

const str = '5';
str.padStart(2, '0'); // 05

Here is a sample use case: YouTube durations in 4 lines of JavaScript