I'm unable to understand how a piece of text has some kind of hardcoded font in it, that cannot be removed even after pasting into an RTE, application of CSS etc. See 2 examples below copied from various places:
Sample 1 - this font is apparently Cambria Math, and will not / cannot be overridden by CSS when displaying or removed when pasting into an RTE. Eg take this text and dump into CKEditor, QuillJS and any other, it will remain the same. In fact the same is happening right here in this editor - the font is not getting removed, and I'm unable to explain why.
๐๐ง๐๐ฎ๐ฌ๐ญ๐ซ๐ฒ ๐๐ง๐๐ฅ๐ฒ๐ฌ๐ข๐ฌ ๐ข๐ฌ ๐ ๐๐ซ๐ฎ๐๐ข๐๐ฅ ๐ฌ๐ญ๐๐ฉ ๐ข๐ง ๐ญ๐ก๐ ๐๐ฎ๐ซ๐ซ๐๐ง๐ญ ๐๐จ๐ฆ๐ฉ๐๐ญ๐ข๐ญ๐ข๐ฏ๐ ๐ฆ๐๐ซ๐ค๐๐ญ ๐ฌ๐ฉ๐๐๐ ๐ญ๐ก๐๐ญ ๐ก๐๐ฅ๐ฉ๐ฌ ๐ข๐๐๐ง๐ญ๐ข๐๐ฒ ๐ญ๐ก๐ ๐ซ๐ข๐ ๐ก๐ญ ๐ญ๐๐ซ๐ ๐๐ญ ๐๐ฎ๐ฌ๐ญ๐จ๐ฆ๐๐ซ๐ฌ ๐๐ง๐ ๐๐๐๐จ๐ซ๐๐ข๐ง๐ ๐ฅ๐ฒ ๐ฉ๐ซ๐จ๐ฏ๐ข๐๐ ๐ญ๐๐ข๐ฅ๐จ๐ซ๐๐ ๐ฌ๐จ๐ฅ๐ฎ๐ญ๐ข๐จ๐ง๐ฌ ๐๐จ๐ซ ๐ญ๐ก๐๐ข๐ซ ๐๐ฎ๐ฌ๐ข๐ง๐๐ฌ๐ฌ ๐ง๐๐๐๐ฌ. ๐๐ฏ๐๐ซ๐ฒ ๐๐ฌ๐ฉ๐๐๐ญ ๐๐ง๐ ๐ฎ๐ง๐ข๐ช๐ฎ๐ ๐๐ก๐๐ฅ๐ฅ๐๐ง๐ ๐๐ฌ ๐ฉ๐ฎ๐ญ ๐ฎ๐ฉ ๐๐ฒ ๐ญ๐ก๐ ๐ฉ๐๐ซ๐ญ๐ข๐๐ฎ๐ฅ๐๐ซ ๐ข๐ง๐๐ฎ๐ฌ๐ญ๐ซ๐ฒ ๐๐ซ๐ ๐๐๐ซ๐๐๐ฎ๐ฅ๐ฅ๐ฒ ๐ญ๐๐ค๐๐ง ๐ข๐ง๐ญ๐จ ๐๐จ๐ง๐ฌ๐ข๐๐๐ซ๐๐ญ๐ข๐จ๐ง ๐ฐ๐ก๐ข๐ฅ๐ ๐๐จ๐ซ๐ฆ๐ฎ๐ฅ๐๐ญ๐ข๐ง๐ ๐ญ๐ก๐๐ฌ๐ ๐ฌ๐จ๐ฅ๐ฎ๐ญ๐ข๐จ๐ง๐ฌ. ๐๐ญ ๐๐ฅ๐ฌ๐จ ๐ญ๐๐ค๐๐ฌ ๐ข๐ง๐ญ๐จ ๐๐จ๐ง๐ฌ๐ข๐๐๐ซ๐๐ญ๐ข๐จ๐ง ๐ฏ๐๐ซ๐ข๐จ๐ฎ๐ฌ ๐ ๐จ๐ฏ๐๐ซ๐ง๐ฆ๐๐ง๐ญ ๐ซ๐๐๐จ๐ซ๐ฆ๐ฌ, ๐๐จ๐ฆ๐ฉ๐๐ญ๐ข๐ญ๐ข๐ฏ๐ ๐๐ง๐ฏ๐ข๐ซ๐จ๐ง๐ฆ๐๐ง๐ญ, ๐๐ฎ๐ฌ๐ญ๐จ๐ฆ๐๐ซ ๐๐๐ก๐๐ฏ๐ข๐จ๐ซ, ๐๐ฑ๐ข๐ฌ๐ญ๐ข๐ง๐ ๐๐ง๐ ๐ฎ๐ฉ๐๐จ๐ฆ๐ข๐ง๐ ๐๐ฎ๐ฌ๐ข๐ง๐๐ฌ๐ฌ ๐ฆ๐จ๐๐๐ฅ๐ฌ, ๐๐ง๐ ๐๐ฏ๐๐ซ-๐๐ฏ๐จ๐ฅ๐ฏ๐ข๐ง๐ ๐ญ๐๐๐ก๐ง๐จ๐ฅ๐จ๐ ๐ข๐๐๐ฅ ๐๐๐ฏ๐๐ฅ๐จ๐ฉ๐ฆ๐๐ง๐ญ๐ฌ. ๐๐ง๐๐ฎ๐ฌ๐ญ๐ซ๐ฒ ๐๐ง๐๐ฅ๐ฒ๐ฌ๐ข๐ฌ ๐ก๐๐ฅ๐ฉ๐ฌ ๐๐ง ๐จ๐ซ๐ ๐๐ง๐ข๐ณ๐๐ญ๐ข๐จ๐ง ๐๐จ๐ซ๐ฆ๐ฎ๐ฅ๐๐ญ๐ ๐ฌ๐ญ๐ซ๐๐ญ๐๐ ๐ข๐๐ฌ ๐๐ง๐ ๐ฉ๐จ๐ฅ๐ข๐๐ข๐๐ฌ ๐จ๐ ๐ ๐๐ฎ๐ฌ๐ข๐ง๐๐ฌ๐ฌ.
Sample 2 - this is how it should be. When rendered the target CSS font is used.
Allowing PUT as create operations is problematic, as it necessarily exposes information about the existence or non-existence of objects. It's also not obvious that transparently allowing re-creating of previously deleted instances is necessarily a better default behavior than simply returning 404 responses.
Finally figured the answer thanks to a chance visit to lingojam - apparently its unicode not font.
Example:
๐๐ฅ๐ข๐ฐ๐ข ๐๐ฏ๐ข ๐๐ฉ๐ฉ ๐ฒ๐ซ๐ฆ๐ ๐ฌ๐ก๐ข ๐ ๐ฅ๐๐ฏ๐ฐ, ๐ก๐ฒ๐ฅ.
๐ฟ๐๐๐๐ ๐๐๐ ๐๐๐ ๐๐๐๐๐๐๐ ๐๐๐๐๐, ๐๐๐.
๐โ ลค๏ผจ๏ผฅ๐ผแบธ ๏ฝ๏ฝ๏ฝ โ๐ต๐ แต๐แฅโ๏ฝ๐นไน ฯ๐รสณ๐ข, ๐ญ๐ค๐ก. โ๐
๐ฃ๐ฑ๐ฎ๐ผ๐ฎ ๐ช๐ป๐ฎ ๐ช๐ต๐ต ๐พ๐ท๐ฒ๐ฌ๐ธ๐ญ๐ฎ ๐ฌ๐ฑ๐ช๐ป๐ผ, ๐ญ๐พ๐ฑ.
๐ฏ๐ฝ๐๐๐ ๐ถ๐๐ ๐ถ๐๐ ๐๐๐พ๐ธ๐๐น๐ ๐ธ๐ฝ๐ถ๐๐, ๐น๐๐ฝ.
๐๐๐๐ค๐ ๐๐ฃ๐ ๐๐๐ ๐ฆ๐๐๐๐ ๐๐ ๐๐๐๐ฃ๐ค, ๐๐ฆ๐.
๏ผด๏ฝ๏ฝ ๏ฝ๏ฝ ๏ฝ๏ฝ๏ฝ ๏ฝ๏ฝ๏ฝ ๏ฝ๏ฝ๏ฝ๏ฝ๏ฝ๏ฝ๏ฝ ๏ฝ๏ฝ๏ฝ๏ฝ๏ฝ๏ผ ๏ฝ๏ฝ๏ฝ๏ผ
๐ ๐ ๐ฏ๐ฝ๐๐๐ ๐ถ๐๐ ๐ถ๐๐ ๐๐๐พ๐ธโฏ๐น๐ ๐ธ๐ฝ๐ถ๐๐, ๐น๐๐ฝ. ๐ ๐
Amongst the thousands of symbols in Unicode is the normal alphabetic symbols (the ones you're reading right now), but also a number of other alphabets which are different in some way. There are also thousands of characters which look like letters from the Latin alphabet, but are really symbols from other symbols sets and languages. Either way, we can pick out all sorts of symbols from the Unicode standard and use them to construct all sorts of novel textual font styles which we can copy and paste.
Source: https://lingojam.com/TextFonts