JS: String.prototype.padEnd

(new in ECMAScript 2017)

str.padEnd(n)

Return a new string, by adding space to the end of string so the length is n.

console.log("x".padEnd(3) === "x  ");

str.padEnd(n, padstr)

Use padStr to pad.

console.log("x".padEnd(3, "0") === "x00");
console.log("x".padEnd(4, "ab") === "xaba");
// true

🛑 WARNING: string methods do not work the way you think if it contains characters outside of Unicode Basic Multilingual Plane (e.g. emoji 🦋.). See JS: String Index Code Unit