Can't copy and paste MathJax rendered content

[Trilarion]

Describe the bug

MathJax rendered output cannot be selected and copied to clipboard.

To Reproduce

Select text for example from https://math.codidact.com/posts/278629 and copy and paste somewhere else. For example the title becomes: "Why does the decimal expansion of have this neat pattern?" with 1/(10n-1) missing.

Expected behavior

The mathematical content should also have been included. Math.SE can do it.

For example https://math.stackexchange.com/questions/4361758/x-1-cdots-x-n-such-that-px-i-1-px-i-1-frac12-denote-s-sum-i-1 and the copying the title gives: "X1,⋯,Xn such that P(Xi=1)=P(Xi=−1)=12 . Denote S=∑ni=1Xi . Prove P(X>n10)<2−cn" QPixel should be able to do that too.

[Trilarion]

If it would work, it might be a possible solution for #262

[cellio]

Do we have any idea how Math.SE makes it work? Any clues in the inspector?

[MoshiKoi]

This is a MathJax 3.0 issue currently being tracked at https://github.com/mathjax/MathJax/issues/2240

[Trilarion]

The issue on MathJax is labeled feature request and exists since 2019. A bit of code that might fix the problem is given in a comment there but the safer option might be to go back to MathJax 2.X until the feature is reintroduced officially in 3.X.

I'm personally more inclined to say it's a bug, because copy and paste of rendered mathematical expressions is a frequent operation and should be possible even if the output is not faithfully the same as the original Tex text.

May be the reason SE is still using 2.X.