Generate array of times (as strings) for every X minutes in JavaScript

Question

I\'m trying to create an array of times (strings, not Date objects) for every X minutes throughout a full 24 hours. For example, for a 5 minute interval the arr

Answer 1

Allocating the resulting array to avoid the overhead of push, parameter validation and locale specifics notwithstanding:

    function generate_series(step) {
        const dt = new Date(1970, 0, 1);
        const rc = [];
        while (dt.getDate() === 1) {
            rc.push(dt.toLocaleTimeString('en-US'));
            dt.setMinutes(dt.getMinutes() + step);
        }
        return rc;
    }

Here's a demo snippet.

function generate_series(step) {
  const dt = new Date(1970, 0, 1);
  const rc = [];
  while (dt.getDate() === 1) {
    rc.push(dt.toLocaleTimeString('en-US'));
    dt.setMinutes(dt.getMinutes() + step);
  }
  return rc;
}

function on_generate_series(step) {
  const dt = new Date(1970, 0, 1);
  const el = document.getElementById("series")
  while (el.firstChild)
    el.removeChild(el.firstChild);
  const series = generate_series(step);
  while (series.length > 0) {
    let item = document.createElement("div");
    item.innerText = series.shift();
    el.appendChild(item);
  }
}

24 Hour Minute Series