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32 lines
1.3 KiB
Markdown
32 lines
1.3 KiB
Markdown
---
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id: version-0.13.0-migration
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title: Migration Guide
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original_id: migration
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---
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As of KaTeX 1.0, we've changed how MacroExpander and Parser work in order to close
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some gaps between KaTeX and LaTeX and therefore there may be breaking changes.
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## Macro arguments
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Tokens will not be expanded while parsing a macro argument. For example, `\frac\foo\foo`,
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where the `\foo` is defined as `12`, will be parsed as `\frac{12}{12}`, not
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`\frac{1}{2}12`. To expand the argument before parsing, `\expandafter` can
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be used like `\expandafter\frac\foo\foo`.
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## `\def`
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`\def` no longer accepts a control sequence enclosed in braces. For example,
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`\def{\foo}{}` no longer works and should be changed to `\def\foo{}`.
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It also no longer accepts replacement text not enclosed in braces. For example,
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`\def\foo1` no longer works and should be changed to `\def\foo{1}`.
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## `\newline` and `\cr`
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`\newline` and `\cr` no longer takes an optional size argument. To specify vertical
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spacing, `\\` should be used.
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## `\cfrac`, `\color`, `\textcolor`, `\colorbox`, `\fcolorbox`
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They are no longer allowed as an argument to primitive commands, such as `\sqrt`
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(without the optional argument) and super/subscript. For example,
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`\sqrt\textcolor{red}{x}` no longer works and should be changed to
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`\sqrt{\textcolor{red}{x}}`.
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