Gutenberg Contributors Discuss the Drawbacks of Using iframes for Meta Boxes

photo credit: Closed square box, variation – (license)
A lively and productive discussion regarding Gutenberg’s use of iframes for meta boxes is happening on GitHub. Yesterday, WordPress developer Kevin Hoffman created an issue titled “Are iframes a viable long-term solution for meta boxes?”
Gutenberg 1.5 introduced initial support for meta boxes. Hoffman identified several issues with iframes that have been popping up as developers have begun testing the current meta box implementation....

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