Fix MathJax in Cloze

Anki Add-ons
1

Fix MathJax in Cloze

An Anki add-on that fixes cloze conflicts where }} inside MathJax (or other cloze text) is interpreted as the end of a cloze deletion.

Cloze Conflict Background

Cloze deletions are terminated with }}. If }} appears inside cloze content, Anki may close the cloze too early.

  • Problematic:

{{c1::[$]\frac{foo}{\frac{bar}{baz}}[/$] blah blah blah.}}
  • Works (space workaround):

{{c1::[$]\frac{foo}{\frac{bar}{baz} }[/$] blah blah blah.}}

LaTeX math mode ignores extra spaces, so rendering remains the same.

Alternative workaround (for cases where visible spaces matter):


{{c1::[$]\frac{foo}{\frac{bar}{baz}<!-- -->}[/$] blah blah blah.}}

The same idea also helps when :: needs to appear in cloze-deleted text, e.g.:


{{c1::std:<!-- -->:variant::~type~}} in C++ is a {{c2::type-safe union}}

What this add-on does

This add-on applies the space workaround by default:

  • Replaces internal }} inside cloze answer text with } }

  • Leaves the actual cloze terminator untouched

  • Supports cloze hints like {{c1::answer::hint}}

Features

  • Bulk fix from Card Browser on selected notes

  • Single-note fix from Review screen context menu

  • Safe cloze parsing with nesting awareness

  • Configurable replacement token via config.json

Usage

1. Bulk fix from Browser

  1. Open Browse.

  2. Select one or more notes.

  3. Click Notes → Fix MathJax in Cloze (selected notes).

  4. A tooltip shows how many notes/replacements were updated.

2. Fix current review note

  1. While reviewing a card, right-click.

  2. Click Fix MathJax in This Note.

  3. The current note is updated immediately.

Configuration

config.json:


{

"replacement": "} }"

}

  • replacement: string used to replace internal }} inside cloze answers.

  • Default is } } (space workaround).

Files

  • __init__.py - Add-on logic, parser, and UI hooks

  • manifest.json - Add-on metadata

  • config.json - User-configurable replacement token

Notes

  • The add-on rewrites only }} found inside cloze answer text.

  • Malformed cloze text is left unchanged for safety.