latex rendering exception

[fisheryv]

Describe the bug

The following latex
$P(x) = a_nx^n+a_{n-1}x^{n-1} + \dots + a_1x + a_0$
will be renderer as
$P(x) = a[objectObject],[objectObject],[objectObject]{n-1}x^{n-1} + \dots + a_1x + a_0$

I think this is caused by the latex parser parsing the content between underscores _..._ as emphasistext.

I will try to fix the problem.

Reproduction

$P(x) = a_nx^n+a_{n-1}x^{n-1} + \dots + a_1x + a_0$

System Info

System:
    OS: Linux 6.2 Ubuntu 22.04.3 LTS 22.04.3 LTS (Jammy Jellyfish)
    CPU: (2) x64 Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz
    Memory: 2.28 GB / 7.76 GB
    Container: Yes
    Shell: 5.1.16 - /bin/bash
  Binaries:
    Node: 20.10.0 - ~/.nvm/versions/node/v20.10.0/bin/node
    Yarn: 1.22.21 - ~/.nvm/versions/node/v20.10.0/bin/yarn
    npm: 10.2.5 - ~/.nvm/versions/node/v20.10.0/bin/npm
    pnpm: 8.12.1 - ~/.nvm/versions/node/v20.10.0/bin/pnpm

Used Package Manager

pnpm

Validations

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• The provided reproduction is a minimal reproducible of the bug.

[fisheryv]

One more thing, this problem only occurs in inline mode, display mode does not have this problem.

And it is sensitive to braces. Removing the braces between underscores can be rendered correctly.

[fisheryv]

Well, I think this is an issue with markdown-to-jsx.

I found the simplest way to solve the problem was removing the _ in the TEXT_EMPHASIZED_R regex, as follows

/^([*])((?:\[.*?\][([].*?[)\]]|<.*?>(?:.*?<.*?>)?|`.*?`|~+.*?~+|.)*?)\1(?!\1|\w)/

However, if I do so, markdown will not support using underline syntax _..._ for emphasis.

Any suggestions？ @Innei

[Innei]

Fixed, thank you

[fisheryv]

Well done. Thank you!