✅ Can the font size be adjusted automatically?

Automatic font size adjustment

Font size must be adjusted to a nice size

Regroup used to make stickies in Canvas.

Is it possible to have "stickies with auto-adjusting font size" in raw DOM?

→It was possible.

https://gyazo.com/2ac6fc4c057110bfef02262e9ee20bbd

Even if overflow: hidden, the scrollHeight will be increased after overflow, so it is possible to determine overflow.

javascript - Check if an element's content is overflowing? - Stack Overflow

Pending on how to do [Align vertically centered

I can't test it in jsdom because scrollHeight is 0.

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