Backslash escape fails to escape special characters.

[twall]

With the input text _{over\_flow}_, I would expect to see

_{overflow}

but markdown-to-jsx renders it as

{over\_ flow}

I'm doing my own interpolation between the braces, to allow variable substitution and filtering (it'd be nice if the compiler did it, but for now I'm post-processing properties and text).

[quantizor]

Hmm yeah that should be fixed, thanks

[lowellstewart]

@probablyup ... I'm working on a fix for this, and it seemed like a natural fix (given the way parsing works) is to tweak the regexes that parse "paired" markdown tokens, to prevent specific escaped characters from interfering with proper detection of the markdown.

I tweaked TEXT_BOLD_R, TEXT_EMPHASIZED_R, and TEXT_STRIKETHROUGHED_R in this way -- very minor changes:

const TEXT_BOLD_R = /^([*_])\1((?:\[.*?\][([].*?[)\]]|<.*?>(?:.*?<.*?>)?|`.*?`|~+.*?~+|.)*?)\1\1(?!\1)/;
// to
const TEXT_BOLD_R = /^([*_])\1((?:\\\1|\[.*?\][([].*?[)\]]|<.*?>(?:.*?<.*?>)?|`.*?`|~+.*?~+|.)*?)\1\1(?!\1)/;

I'm reviewing the other regexes to see if similar changes can avoid escaping problems. Does this seem like a reasonable approach? If so I'll prepare a merge request.

[davidnduffy]

I'm not sure if this is related but I have a problem with a backslash simply disappearing from the rendered text in a link. e.g. [Some\text](https://some.link/?param=some\text) comes out as <a href='https://some.link?param=sometext'>Some\text</a> with the backslash missing in the URL param portion.

[mrelarsen]

I'm not sure if this is related but I have a problem with a backslash simply disappearing from the rendered text in a link. e.g. [Some\text](https://some.link/?param=some\text) comes out as <a href='https://some.link?param=sometext'>Some\text</a> with the backslash missing in the URL param portion.

I have not looked in the code base, but a backslash should be illegal in a url so I would imagine that a sanitizer removes it to have a valid url.