Skip to content

Latest commit

 

History

History
24 lines (20 loc) · 621 Bytes

extendHex.md

File metadata and controls

24 lines (20 loc) · 621 Bytes
title tags
extendHex
string,intermediate

Extends a 3-digit color code to a 6-digit color code.

  • Use Array.prototype.map(), String.prototype.split() and Array.prototype.join() to join the mapped array for converting a 3-digit RGB notated hexadecimal color-code to the 6-digit form.
  • Array.prototype.slice() is used to remove # from string start since it's added once.
const extendHex = shortHex =>
  '#' +
  shortHex
    .slice(shortHex.startsWith('#') ? 1 : 0)
    .split('')
    .map(x => x + x)
    .join('');
extendHex('#03f'); // '#0033ff'
extendHex('05a'); // '#0055aa'