<https://github.com/tc39/proposal-arraybuffer-base64>
<rdar://problem/130456620>
Pull request: https://github.com/WebKit/WebKit/pull/30481
Committed 280967@main (eeedf04c47ff): <https://commits.webkit.org/280967@main> Reviewed commits have been landed. Closing PR #30481 and removing active labels.