Convert ARGB to RGBA format

Question

I have an 8-bit hex decimal which is in aarrggbb format. I need methods to convert this to rrggbbaa format and vise versa. For eg

ARGB format

#FFFF2323

What i need is RGBA format

#FF2323FF

so, you have a string #FFFF2323? you want `'#FFFF2323'.replace(/#(..)(......)/, '#$2$1')` — Jaromanda X, Jun 26 '18 at 07:41
@JaromandaX Very elegant solution. Please make it an answer to the question :-) — Emil S. Jørgensen, Jun 26 '18 at 07:45

score 5 · Accepted Answer · answered Jun 26 '18 at 07:50

If you're dealing with a string #FF123456

let x = '#FF123456';
console.log(x.replace(/#(..)(......)/, '#$2$1'));

If, however, x is a number, 0xFF123456 -

let x = 0xFF123456
console.log(`#${(x & 0x0FFFFFF).toString(16).padStart(6, '0')}${(x >>> 24).toString(16).padStart(2, '0')}`);

score 2 · Answer 2 · answered Jun 26 '18 at 07:50

2

All you have to do is move a[1] and a[2] to the end

var a = "#AABBCCDD";

var b = "#"+a.slice(3,9)+a[1]+a[2];

answered Jun 26 '18 at 07:50

alynurly

2 Answers2