Pad a label so short values line up.

Padding Strings

pad_strings.js
const id = "7";
const left = id.padStart(3, "0");
const right = id.padEnd(4, ".");

console.log("id=" + id);
console.log("left=" + left);
console.log("right=" + right);
pad-strings `padStart` and `padEnd` add characters until a string reaches a chosen length. This is useful for fixed-width labels.