8ee50178f3
Correct: `Array.from()` (it’s a static method) Incorrect: `Array.join()` (doesn’t exist; it’s a prototype method) This patch uses the common `#` syntax to denote `.prototype.`.
580 B
580 B
extendHex
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'