const str = "asdfghjklmnopq";
const splitPairs = str.match(/.{1,2}/g);
console.log(splitPairs); // ['as', 'df', 'gh', 'jk', 'lm', 'no', 'pq']
Preview:
downloadDownload PNG
downloadDownload JPEG
downloadDownload SVG
Tip: You can change the style, width & colours of the snippet with the inspect tool before clicking Download!
Click to optimize width for Twitter