const x = [ [ 1, 2, 3 ], [ 5, 6, 7 ], [ 'a','b' ] ] const y = [].concat(...x) console.log(y)
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