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# [0.16.0](https://github.com/KaTeX/KaTeX/compare/v0.15.6...v0.16.0) (2022-06-06) ### Bug Fixes * **copy-tex:** Use JS (instead of CSS) to select full equation, solving display glitches ([#3586](https://github.com/KaTeX/KaTeX/issues/3586)) ([8c2d852](8c2d852c4a)) ### BREAKING CHANGES * **copy-tex:** copy-tex extension no longer has (or requires) a CSS file. * Code cleanup, lint fixes, port to Flow * Rewrite to extend both start and end of range * Remove contrib/**/*.css linting Co-authored-by: Erik Demaine <edemaine@mit.edu>
24 lines
1.4 KiB
Markdown
24 lines
1.4 KiB
Markdown
# mhchem extension
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This extension adds to KaTeX the `\ce` and `\pu` functions from the [mhchem](https://mhchem.github.io/MathJax-mhchem/) package.
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### Usage
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This extension isn't part of core KaTeX, so the script should be separately included. Write the following line into the HTML page's `<head>`. Place it *after* the line that calls `katex.js`, and if you make use of the [auto-render](https://katex.org/docs/autorender.html) extension, place it *before* the line that calls `auto-render.js`.
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```html
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<script defer src="https://cdn.jsdelivr.net/npm/katex@0.16.0/dist/contrib/mhchem.min.js" integrity="sha384-RTN08a0AXIioPBcVosEqPUfKK+rPp+h1x/izR7xMkdMyuwkcZCWdxO+RSwIFtJXN" crossorigin="anonymous"></script>
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```
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If you remove the `defer` attribute from this tag, then you must also remove the `defer` attribute from the `<script src="https://../katex.min.js">` tag.
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### Syntax
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See the [mhchem Manual](https://mhchem.github.io/MathJax-mhchem/) for a full explanation of the input syntax, with working examples. The manual also includes a demonstration box.
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Note that old versions of `mhchem.sty` used `\cf` for chemical formula and `\ce` for chemical equations, but `\cf` has been deprecated in place of `\ce`. This extension supports only `\ce`. You can define a macro mapping `\cf` to `\ce` if needed.
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### Browser Support
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This extension has been tested on Chrome, Firefox, Opera, and Edge.
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