9869d59cad
Summary: On https://app.asana.com/0/34646644303310/33935538887378, @eater requested we add some new colors to KaTeX, which lives in the spin-off Khan/KaTeX open source project. (See screenshot for colors.) I added these colors to KaTeX so math typesetting tools in exercises have access to them. I used "blueA", "blueB", etc. because dashes and numbers aren't supported in KaTeX/LaTeX functions. The actual mapping of color name => hex value is in "Options", and the listing of colors available for typesetting is in "functions". See also https://phabricator.khanacademy.org/D18158 for the related additions to utils/math.js and KAthJax. Test Plan: - Set up the KaTeX dev environment (instructions taken from https://github.com/Khan/KaTeX/blob/master/CONTRIBUTING.md): ``` cd KaTeX make setup make serve ``` - Now that the server is up and running, visit http://localhost:7936/ to try live typesetting. Enter the following LaTeX code to try the new colors: ``` \blueE{e=mc^2} ``` - Try other new colors including \redD, \mintC, \grayH, \kaBlue, etc. - Old colors like \orange should still work. - Run the Jasmine test suite at http://localhost:7936/test/test.html. Reviewers: emily Reviewed By: emily Subscribers: nataliefitzgerald, eater, cameron, david Differential Revision: https://phabricator.khanacademy.org/D18152 |
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| build | ||
| contrib/auto-render | ||
| dockers | ||
| metrics | ||
| src | ||
| static | ||
| test | ||
| .arcconfig | ||
| .gitignore | ||
| .jshintrc | ||
| .travis.yml | ||
| cli.js | ||
| CONTRIBUTING.md | ||
| katex.js | ||
| LICENSE.txt | ||
| lint_blacklist.txt | ||
| Makefile | ||
| package.json | ||
| README.md | ||
| server.js | ||
KaTeX is a fast, easy-to-use JavaScript library for TeX math rendering on the web.
- 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.
- Print quality: KaTeX’s layout is based on Donald Knuth’s TeX, the gold standard for math typesetting.
- Self contained: KaTeX has no dependencies and can easily be bundled with your website resources.
- 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.
KaTeX supports all major browsers, including Chrome, Safari, Firefox, Opera, and IE 8 - IE 11.
Usage
You can download KaTeX and host it on your server or include the katex.min.js and katex.min.css files on your page directly from a CDN:
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/KaTeX/0.2.0/katex.min.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/KaTeX/0.2.0/katex.min.js"></script>
In-browser rendering
Call katex.render with a TeX expression and a DOM element to render into:
katex.render("c = \\pm\\sqrt{a^2 + b^2}", element);
If KaTeX can't parse the expression, it throws a katex.ParseError error.
Server side rendering or rendering to a string
To generate HTML on the server or to generate an HTML string of the rendered math, you can use katex.renderToString:
var html = katex.renderToString("c = \\pm\\sqrt{a^2 + b^2}");
// '<span class="katex">...</span>'
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.
Rendering options
You can provide an object of options as the last argument to katex.render and katex.renderToString. Available options are:
displayMode:boolean. Iftruethe math will be rendered in display mode, which will put the math in display style (so\intand\sumare large, for example), and will center the math on the page on its own line. Iffalsethe math will be rendered in inline mode. (default:false)
For example:
katex.render("c = \\pm\\sqrt{a^2 + b^2}", element, { displayMode: true });
Automatic rendering of math on a page
Math on the page can be automatically rendered using the auto-render extension. See the Auto-render README for more information.
Contributing
See CONTRIBUTING.md
License
KaTeX is licensed under the MIT License.