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https://github.com/Jermolene/TiddlyWiki5
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Update to KaTeX v0.12.0
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# [<img src="https://khan.github.io/KaTeX/katex-logo.svg" width="130" alt="KaTeX">](https://khan.github.io/KaTeX/)
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[![Build Status](https://travis-ci.org/Khan/KaTeX.svg?branch=master)](https://travis-ci.org/Khan/KaTeX)
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[![codecov](https://codecov.io/gh/Khan/KaTeX/branch/master/graph/badge.svg)](https://codecov.io/gh/Khan/KaTeX)
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[![Join the chat at https://gitter.im/Khan/KaTeX](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/Khan/KaTeX?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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# [<img src="https://katex.org/img/katex-logo-black.svg" width="130" alt="KaTeX">](https://katex.org/)
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[![npm](https://img.shields.io/npm/v/katex.svg)](https://www.npmjs.com/package/katex)
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[![CircleCI](https://circleci.com/gh/KaTeX/KaTeX.svg?style=shield)](https://circleci.com/gh/KaTeX/KaTeX)
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[![codecov](https://codecov.io/gh/KaTeX/KaTeX/branch/master/graph/badge.svg)](https://codecov.io/gh/KaTeX/KaTeX)
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[![Join the chat at https://gitter.im/KaTeX/KaTeX](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/KaTeX/KaTeX?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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[![Dependabot Status](https://api.dependabot.com/badges/status?host=github&repo=KaTeX/KaTeX)](https://dependabot.com)
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[![jsDelivr](https://data.jsdelivr.com/v1/package/npm/katex/badge?style=rounded)](https://www.jsdelivr.com/package/npm/katex)
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![](https://img.badgesize.io/KaTeX/KaTeX/v0.12.0/dist/katex.min.js?compression=gzip)
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KaTeX is a fast, easy-to-use JavaScript library for TeX math rendering on the web.
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* **Fast:** KaTeX renders its math synchronously and doesn't need to reflow the page. See how it compares to a competitor in [this speed test](http://www.intmath.com/cg5/katex-mathjax-comparison.php).
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* **Print quality:** KaTeX’s layout is based on Donald Knuth’s TeX, the gold standard for math typesetting.
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* **Print quality:** KaTeX's layout is based on Donald Knuth's TeX, the gold standard for math typesetting.
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* **Self contained:** KaTeX has no dependencies and can easily be bundled with your website resources.
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* **Server side rendering:** KaTeX produces the same output regardless of browser or environment, so you can pre-render expressions using Node.js and send them as plain HTML.
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KaTeX supports all major browsers, including Chrome, Safari, Firefox, Opera, Edge, and IE 9 - IE 11. More information can be found on the [list of supported commands](https://khan.github.io/KaTeX/function-support.html) and on the [wiki](https://github.com/khan/katex/wiki).
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KaTeX is compatible with all major browsers, including Chrome, Safari, Firefox, Opera, Edge, and IE 11.
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## Usage
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KaTeX supports much (but not all) of LaTeX and many LaTeX packages. See the [list of supported functions](https://katex.org/docs/supported.html).
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You can [download KaTeX](https://github.com/khan/katex/releases) and host it on your server or include the `katex.min.js` and `katex.min.css` files on your page directly from a CDN:
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Try out KaTeX [on the demo page](https://katex.org/#demo)!
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## Getting started
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### Starter template
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```html
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<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.10.0/katex.min.css" integrity="sha384-VEnyslhHLHiYPca9KFkBB3CMeslnM9CzwjxsEbZTeA21JBm7tdLwKoZmCt3cZTYD" crossorigin="anonymous">
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<script src="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.10.0/katex.min.js" integrity="sha384-O4hpKqcplNCe+jLuBVEXC10Rn1QEqAmX98lKAIFBEDxZI0a+6Z2w2n8AEtQbR4CD" crossorigin="anonymous"></script>
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<!DOCTYPE html>
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<!-- KaTeX requires the use of the HTML5 doctype. Without it, KaTeX may not render properly -->
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<html>
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<head>
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<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.12.0/dist/katex.min.css" integrity="sha384-AfEj0r4/OFrOo5t7NnNe46zW/tFgW6x/bCJG8FqQCEo3+Aro6EYUG4+cU+KJWu/X" crossorigin="anonymous">
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<!-- The loading of KaTeX is deferred to speed up page rendering -->
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<script defer src="https://cdn.jsdelivr.net/npm/katex@0.12.0/dist/katex.min.js" integrity="sha384-g7c+Jr9ZivxKLnZTDUhnkOnsh30B4H0rpLUpJ4jAIKs4fnJI+sEnkvrMWph2EDg4" crossorigin="anonymous"></script>
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<!-- To automatically render math in text elements, include the auto-render extension: -->
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<script defer src="https://cdn.jsdelivr.net/npm/katex@0.12.0/dist/contrib/auto-render.min.js" integrity="sha384-mll67QQFJfxn0IYznZYonOWZ644AWYC+Pt2cHqMaRhXVrursRwvLnLaebdGIlYNa" crossorigin="anonymous"
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onload="renderMathInElement(document.body);"></script>
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</head>
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...
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</html>
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```
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#### In-browser rendering
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You can also [download KaTeX](https://github.com/KaTeX/KaTeX/releases) and host it yourself.
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Call `katex.render` with a TeX expression and a DOM element to render into:
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For details on how to configure auto-render extension, refer to [the documentation](https://katex.org/docs/autorender.html).
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```js
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katex.render("c = \\pm\\sqrt{a^2 + b^2}", element);
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```
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If KaTeX can't parse the expression, it throws a `katex.ParseError` error.
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#### Server side rendering or rendering to a string
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To generate HTML on the server or to generate an HTML string of the rendered math, you can use `katex.renderToString`:
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```js
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var html = katex.renderToString("c = \\pm\\sqrt{a^2 + b^2}");
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// '<span class="katex">...</span>'
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```
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Make sure to include the CSS and font files, but there is no need to include the JavaScript. Like `render`, `renderToString` throws if it can't parse the expression.
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#### Security
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Any HTML generated by KaTeX *should* be safe from `<script>` or other code
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injection attacks.
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(See `maxSize` below for preventing large width/height visual affronts.)
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Of course, it is always a good idea to sanitize the HTML, though you will need
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a rather generous whitelist (including some of SVG and MathML) to support
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all of KaTeX.
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#### Handling errors
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If KaTeX encounters an error (invalid or unsupported LaTeX), then it will
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throw an exception of type `katex.ParseError`. The message in this error
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includes some of the LaTeX source code, so needs to be escaped if you want
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to render it to HTML. In particular, you should convert `&`, `<`, `>`
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characters to `&`, `<`, `>` (e.g., using `_.escape`)
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before including either LaTeX source code or exception messages in your
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HTML/DOM. (Failure to escape in this way makes a `<script>` injection
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attack possible if your LaTeX source is untrusted.)
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#### Rendering options
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You can provide an object of options as the last argument to `katex.render` and `katex.renderToString`. Available options are:
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- `displayMode`: `boolean`. If `true` the math will be rendered in display mode, which will put the math in display style (so `\int` and `\sum` are large, for example), and will center the math on the page on its own line. If `false` the math will be rendered in inline mode. (default: `false`)
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- `throwOnError`: `boolean`. If `true`, KaTeX will throw a `ParseError` when it encounters an unsupported command. If `false`, KaTeX will render the unsupported command as text in the color given by `errorColor`. (default: `true`)
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- `errorColor`: `string`. A color string given in the format `"#XXX"` or `"#XXXXXX"`. This option determines the color which unsupported commands are rendered in. (default: `#cc0000`)
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- `macros`: `object`. A collection of custom macros. Each macro is a property with a name like `\name` (written `"\\name"` in JavaScript) which maps to a string that describes the expansion of the macro. Single-character keys can also be included in which case the character will be redefined as the given macro (similar to TeX active characters).
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- `colorIsTextColor`: `boolean`. If `true`, `\color` will work like LaTeX's `\textcolor`, and take two arguments (e.g., `\color{blue}{hello}`), which restores the old behavior of KaTeX (pre-0.8.0). If `false` (the default), `\color` will work like LaTeX's `\color`, and take one argument (e.g., `\color{blue}hello`). In both cases, `\textcolor` works as in LaTeX (e.g., `\textcolor{blue}{hello}`).
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- `maxSize`: `number`. If non-zero, all user-specified sizes, e.g. in `\rule{500em}{500em}`, will be capped to `maxSize` ems. Otherwise, users can make elements and spaces arbitrarily large (the default behavior).
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### API
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Call `katex.render` to render a TeX expression directly into a DOM element.
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For example:
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```js
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katex.render("c = \\pm\\sqrt{a^2 + b^2}\\in\\RR", element, {
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displayMode: true,
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macros: {
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"\\RR": "\\mathbb{R}"
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}
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katex.render("c = \\pm\\sqrt{a^2 + b^2}", element, {
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throwOnError: false
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});
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```
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#### Automatic rendering of math on a page
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Call `katex.renderToString` to generate an HTML string of the rendered math,
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e.g., for server-side rendering. For example:
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Math on the page can be automatically rendered using the auto-render extension. See [the Auto-render README](contrib/auto-render/README.md) for more information.
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#### Font size and lengths
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By default, KaTeX math is rendered in a 1.21× larger font than the surrounding
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context, which makes super- and subscripts easier to read. You can control
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this using CSS, for example:
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```css
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.katex { font-size: 1.1em; }
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```js
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var html = katex.renderToString("c = \\pm\\sqrt{a^2 + b^2}", {
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throwOnError: false
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});
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// '<span class="katex">...</span>'
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```
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KaTeX supports all TeX units, including absolute units like `cm` and `in`.
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Absolute units are currently scaled relative to the default TeX font size of
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10pt, so that `\kern1cm` produces the same results as `\kern2.845275em`.
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As a result, relative and absolute units are both uniformly scaled relative
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to LaTeX with a 10pt font; for example, the rectangle `\rule{1cm}{1em}` has
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the same aspect ratio in KaTeX as in LaTeX. However, because most browsers
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default to a larger font size, this typically means that a 1cm kern in KaTeX
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will appear larger than 1cm in browser units.
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Make sure to include the CSS and font files in both cases.
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If you are doing all rendering on the server, there is no need to include the
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JavaScript on the client.
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### Common Issues
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- Many Markdown preprocessors, such as the one that Jekyll and GitHub Pages use,
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have a "smart quotes" feature. This changes `'` to `’` which is an issue for
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math containing primes, e.g. `f'`. This can be worked around by defining a
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single character macro which changes them back, e.g. `{"’", "'"}`.
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- KaTeX follows LaTeX's rendering of `aligned` and `matrix` environments unlike
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MathJax. When displaying fractions one above another in these vertical
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layouts there may not be enough space between rows for people who are used to
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MathJax's rendering. The distance between rows can be adjusted by using
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`\\[0.1em]` instead of the standard line separator distance.
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- KaTeX does not support the `align` environment because LaTeX doesn't support
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`align` in math mode. The `aligned` environment offers the same functionality
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but in math mode, so use that instead or define a macro that maps `align` to
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`aligned`.
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The examples above use the `throwOnError: false` option, which renders invalid
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inputs as the TeX source code in red (by default), with the error message as
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hover text. For other available options, see the
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[API documentation](https://katex.org/docs/api.html),
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[options documentation](https://katex.org/docs/options.html), and
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[handling errors documentation](https://katex.org/docs/error.html).
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## Libraries
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## Demo and Documentation
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### Angular2+
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- [ng-katex](https://github.com/garciparedes/ng-katex) Angular module to write beautiful math expressions with TeX syntax boosted by KaTeX library
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### Ruby
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- [katex-ruby](https://github.com/glebm/katex-ruby) Provides server-side rendering and integration with popular Ruby web frameworks (Rails, Hanami, and anything that uses Sprockets).
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Learn more about using KaTeX [on the website](https://katex.org)!
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## Contributing
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"type": "application/javascript",
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"title": "$:/plugins/tiddlywiki/katex/mhchem.min.js",
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"module-type": "library"
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}
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},
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"prefix": "(function(realRequire) {var require = function(m) {if(m===\"katex\"){m = \"$:/plugins/tiddlywiki/katex/katex.min.js\"};return realRequire(m);};",
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"suffix": "})(require);\n"
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}
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]
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}
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"name": "KaTeX",
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"description": "KaTeX library for mathematical typography",
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"list": "readme usage",
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"library-version": "v0.10.2"
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"library-version": "v0.12.0"
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}
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title: $:/plugins/tiddlywiki/katex/readme
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This is a TiddlyWiki plugin for mathematical and chemical typesetting based on [ext[KaTeX from Khan Academy|http://khan.github.io/KaTeX/]] (v0.10.2) and [ext[mhchem|https://github.com/mhchem/MathJax-mhchem]] through a [ext[Katex extension|https://github.com/KaTeX/KaTeX/tree/master/contrib/mhchem]].
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This is a TiddlyWiki plugin for mathematical and chemical typesetting based on [ext[KaTeX from Khan Academy|http://khan.github.io/KaTeX/]] (v0.12.0) and [ext[mhchem|https://github.com/mhchem/MathJax-mhchem]] through a [ext[Katex extension|https://github.com/KaTeX/KaTeX/tree/master/contrib/mhchem]].
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It is completely self-contained, and doesn't need an Internet connection in order to work. It works both in the browser and under Node.js.
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var katex = require("$:/plugins/tiddlywiki/katex/katex.min.js"),
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chemParse = require("$:/plugins/tiddlywiki/katex/mhchem.min.js"),
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Widget = require("$:/core/modules/widgets/widget.js").widget;
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// Add \ce, \pu, and \tripledash to the KaTeX macros.
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katex.__defineMacro("\\ce", function(context) {
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return chemParse(context.consumeArgs(1)[0], "ce")
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});
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katex.__defineMacro("\\pu", function(context) {
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return chemParse(context.consumeArgs(1)[0], "pu");
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});
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// Needed for \bond for the ~ forms
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// Raise by 2.56mu, not 2mu. We're raising a hyphen-minus, U+002D, not
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// a mathematical minus, U+2212. So we need that extra 0.56.
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katex.__defineMacro("\\tripledash", "{\\vphantom{-}\\raisebox{2.56mu}{$\\mkern2mu"
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+ "\\tiny\\text{-}\\mkern1mu\\text{-}\\mkern1mu\\text{-}\\mkern2mu$}}");
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var KaTeXWidget = function(parseTreeNode,options) {
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this.initialise(parseTreeNode,options);
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