product-backlog
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Published
20 hours ago •
hypothesis
hypothesis
Unable to select MathJax math expressions for highlighting or annotation
Bug report form
Steps to reproduce
- Open an assignment (Demo Canvas module, Page 8 has some in-line math) or visit a page (Demo Public URL) with mathematical expressions rendered by MathJax
- Try to create a highlight or annotation of a mathematical expression
Expected behaviour
The user should be able to select the math notation for annotation.
Actual behaviour
For in-line math, users can select the surrounding text to make an annotation, but users who wish to select display math (i.e. block div elements), the client provides no method for annotating just the math.
The text selector skips over the text wrapped in $ or $$ delimiters, elements that contain the raw LaTeX code:
Example block element:
<html>
<body>
<!--StartFragment-->
<div>
$$
\begin{aligned}
\mathbf{x} = \mathbf{z}_K &= f_K \circ f_{K-1} \circ \dots \circ f_1 (\mathbf{z}_0) \\
\log p(\mathbf{x}) = \log \pi_K(\mathbf{z}_K)
&= \log \pi_{K-1}(\mathbf{z}_{K-1}) - \log\left\vert\det\dfrac{d f_K}{d \mathbf{z}_{K-1}}\right\vert \\
&= \log \pi_{K-2}(\mathbf{z}_{K-2}) - \log\left\vert\det\dfrac{d f_{K-1}}{d\mathbf{z}_{K-2}}\right\vert - \log\left\vert\det\dfrac{d f_K}{d\mathbf{z}_{K-1}}\right\vert \\
&= \dots \\
&= \log \pi_0(\mathbf{z}_0) - \sum_{i=1}^K \log\left\vert\det\dfrac{d f_i}{d\mathbf{z}_{i-1}}\right\vert
\end{aligned}
$$
</div>
<!--EndFragment-->
</body>
</html>
Example in-line element:
<p>(*) A note on <em>“Jacobians of invertible function”</em>: The determinant of the inverse of an invertible matrix is the inverse of the determinant: $\det(M^{-1}) = (\det(M))^{-1}$, <a href="#jacobian-matrix-and-determinant">because</a> $\det(M)\det(M^{-1}) = \det(M \cdot M^{-1}) = \det(I) = 1$.</p>
Browser/system information
- Microsoft Edge / Windows 11
- Canvas LMS / Via
- Firefox / Windows 11
Additional details
This is an update to https://github.com/hypothesis/product-backlog/issues/918
Another user has brought this issue up: https://app.hubspot.com/contacts/6291320/ticket/1642649879
