Add client-side latex rendering (#61)

* feat: client-side katex.js * docs: add katex attribution
2023-09-24 00:59:41 -04:00 · 2023-09-24 00:59:41 -04:00 · 7cf3839f41
commit 7cf3839f41
parent 3424b363d4
67 changed files with 152 additions and 4 deletions
--- a/README.md
+++ b/README.md
@ -35,7 +35,6 @@ This project is super lightweight by design. The UI is simple and the frontend i
 | [a.opnxng.com](a.opnxng.com)                                                    | Singapore                       | Operated by [opnxng.com](https://about.opnxng.com)                                               |
 | [overflow.sudovanilla.com](https://overflow.sudovanilla.com)                    | United States                   | Operated by [SudoVanilla](https://sudovanilla.com)                                               |
 ## Other Instances
 | Instance URL                                                                                                                                               | Region        | Notes                                                     |
@ -121,3 +120,4 @@ Read the [wiki page](https://github.com/httpjamesm/AnonymousOverflow/wiki/Deploy
 -   [goquery](https://github.com/PuerkitoBio/goquery) under the [BSD 3-Clause License](https://github.com/PuerkitoBio/goquery/blob/master/LICENSE)
 -   [resty](https://github.com/go-resty/resty) under the [MIT License](https://github.com/go-resty/resty/blob/master/LICENSE)
 -   [Chroma](https://github.com/alecthomas/chroma) under the [MIT License](https://github.com/alecthomas/chroma/blob/master/COPYING)
 -   [KaTeX](https://github.com/KaTeX/KaTeX) under the [MIT License](https://github.com/KaTeX/KaTeX/blob/main/LICENSE)
--- a/public/katex/README.md
+++ b/public/katex/README.md
@ -0,0 +1,125 @@
 <h1><a href="https://katex.org/">
  <picture>
    <source media="(prefers-color-scheme: dark)" srcset="https://katex.org/img/katex-logo.svg">
    <img alt="KaTeX" width=130 src="https://katex.org/img/katex-logo-black.svg">
  </picture>
 </a></h1>
 [![npm](https://img.shields.io/npm/v/katex.svg)](https://www.npmjs.com/package/katex)
 [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
 [![CI](https://github.com/KaTeX/KaTeX/workflows/CI/badge.svg?branch=main&event=push)](https://github.com/KaTeX/KaTeX/actions?query=workflow%3ACI)
 [![codecov](https://codecov.io/gh/KaTeX/KaTeX/branch/main/graph/badge.svg)](https://codecov.io/gh/KaTeX/KaTeX)
 [![Discussions](https://img.shields.io/badge/Discussions-join-brightgreen)](https://github.com/KaTeX/KaTeX/discussions)
 [![jsDelivr](https://data.jsdelivr.com/v1/package/npm/katex/badge?style=rounded)](https://www.jsdelivr.com/package/npm/katex)
 ![katex.min.js size](https://img.badgesize.io/https://unpkg.com/katex/dist/katex.min.js?compression=gzip)
 [![Gitpod ready-to-code](https://img.shields.io/badge/Gitpod-ready--to--code-blue?logo=gitpod)](https://gitpod.io/#https://github.com/KaTeX/KaTeX)
 [![Financial Contributors on Open Collective](https://opencollective.com/katex/all/badge.svg?label=financial+contributors)](https://opencollective.com/katex)
 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](https://www.intmath.com/cg5/katex-mathjax-comparison.php).
 * **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 is compatible with all major browsers, including Chrome, Safari, Firefox, Opera, Edge, and IE 11.
 KaTeX supports much (but not all) of LaTeX and many LaTeX packages. See the [list of supported functions](https://katex.org/docs/supported.html).
 Try out KaTeX [on the demo page](https://katex.org/#demo)!
 ## Getting started
 ### Starter template
 ```html
 <!DOCTYPE html>
 <!-- KaTeX requires the use of the HTML5 doctype. Without it, KaTeX may not render properly -->
 <html>
  <head>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.16.8/dist/katex.min.css" integrity="sha384-GvrOXuhMATgEsSwCs4smul74iXGOixntILdUW9XmUC6+HX0sLNAK3q71HotJqlAn" crossorigin="anonymous">
    <!-- The loading of KaTeX is deferred to speed up page rendering -->
    <script defer src="https://cdn.jsdelivr.net/npm/katex@0.16.8/dist/katex.min.js" integrity="sha384-cpW21h6RZv/phavutF+AuVYrr+dA8xD9zs6FwLpaCct6O9ctzYFfFr4dgmgccOTx" crossorigin="anonymous"></script>
    <!-- To automatically render math in text elements, include the auto-render extension: -->
    <script defer src="https://cdn.jsdelivr.net/npm/katex@0.16.8/dist/contrib/auto-render.min.js" integrity="sha384-+VBxd3r6XgURycqtZ117nYw44OOcIax56Z4dCRWbxyPt0Koah1uHoK0o4+/RRE05" crossorigin="anonymous"
        onload="renderMathInElement(document.body);"></script>
  </head>
  ...
 </html>
 ```
 You can also [download KaTeX](https://github.com/KaTeX/KaTeX/releases) and host it yourself.
 For details on how to configure auto-render extension, refer to [the documentation](https://katex.org/docs/autorender.html).
 ### API
 Call `katex.render` to render a TeX expression directly into a DOM element.
 For example:
 ```js
 katex.render("c = \\pm\\sqrt{a^2 + b^2}", element, {
    throwOnError: false
 });
 ```
 Call `katex.renderToString` to generate an HTML string of the rendered math,
 e.g., for server-side rendering.  For example:
 ```js
 var html = katex.renderToString("c = \\pm\\sqrt{a^2 + b^2}", {
    throwOnError: false
 });
 // '<span class="katex">...</span>'
 ```
 Make sure to include the CSS and font files in both cases.
 If you are doing all rendering on the server, there is no need to include the
 JavaScript on the client.
 The examples above use the `throwOnError: false` option, which renders invalid
 inputs as the TeX source code in red (by default), with the error message as
 hover text.  For other available options, see the
 [API documentation](https://katex.org/docs/api.html),
 [options documentation](https://katex.org/docs/options.html), and
 [handling errors documentation](https://katex.org/docs/error.html).
 ## Demo and Documentation
 Learn more about using KaTeX [on the website](https://katex.org)!
 ## Contributors
 ### Code Contributors
 This project exists thanks to all the people who contribute code. If you'd like to help, see [our guide to contributing code](CONTRIBUTING.md).
 <a href="https://github.com/KaTeX/KaTeX/graphs/contributors"><img src="https://contributors-svg.opencollective.com/katex/contributors.svg?width=890&button=false" alt="Code contributors" /></a>
 ### Financial Contributors
 Become a financial contributor and help us sustain our community.
 #### Individuals
 <a href="https://opencollective.com/katex"><img src="https://opencollective.com/katex/individuals.svg?width=890" alt="Contribute on Open Collective"></a>
 #### Organizations
 Support this project with your organization. Your logo will show up here with a link to your website.
 <a href="https://opencollective.com/katex/organization/0/website"><img src="https://opencollective.com/katex/organization/0/avatar.svg" alt="Organization 1"></a>
 <a href="https://opencollective.com/katex/organization/1/website"><img src="https://opencollective.com/katex/organization/1/avatar.svg" alt="Organization 2"></a>
 <a href="https://opencollective.com/katex/organization/2/website"><img src="https://opencollective.com/katex/organization/2/avatar.svg" alt="Organization 3"></a>
 <a href="https://opencollective.com/katex/organization/3/website"><img src="https://opencollective.com/katex/organization/3/avatar.svg" alt="Organization 4"></a>
 <a href="https://opencollective.com/katex/organization/4/website"><img src="https://opencollective.com/katex/organization/4/avatar.svg" alt="Organization 5"></a>
 <a href="https://opencollective.com/katex/organization/5/website"><img src="https://opencollective.com/katex/organization/5/avatar.svg" alt="Organization 6"></a>
 <a href="https://opencollective.com/katex/organization/6/website"><img src="https://opencollective.com/katex/organization/6/avatar.svg" alt="Organization 7"></a>
 <a href="https://opencollective.com/katex/organization/7/website"><img src="https://opencollective.com/katex/organization/7/avatar.svg" alt="Organization 8"></a>
 <a href="https://opencollective.com/katex/organization/8/website"><img src="https://opencollective.com/katex/organization/8/avatar.svg" alt="Organization 9"></a>
 <a href="https://opencollective.com/katex/organization/9/website"><img src="https://opencollective.com/katex/organization/9/avatar.svg" alt="Organization 10"></a>
 ## License
 KaTeX is licensed under the [MIT License](https://opensource.org/licenses/MIT).
--- a/public/katex/contrib/auto-render.min.js
+++ b/public/katex/contrib/auto-render.min.js
@ -0,0 +1 @@
 !function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t(require("katex")):"function"==typeof define&&define.amd?define(["katex"],t):"object"==typeof exports?exports.renderMathInElement=t(require("katex")):e.renderMathInElement=t(e.katex)}("undefined"!=typeof self?self:this,(function(e){return function(){"use strict";var t={771:function(t){t.exports=e}},r={};function n(e){var i=r[e];if(void 0!==i)return i.exports;var a=r[e]={exports:{}};return t[e](a,a.exports,n),a.exports}n.n=function(e){var t=e&&e.__esModule?function(){return e.default}:function(){return e};return n.d(t,{a:t}),t},n.d=function(e,t){for(var r in t)n.o(t,r)&&!n.o(e,r)&&Object.defineProperty(e,r,{enumerable:!0,get:t[r]})},n.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)};var i={};return function(){n.d(i,{default:function(){return s}});var e=n(771),t=n.n(e),r=function(e,t,r){for(var n=r,i=0,a=e.length;n<t.length;){var o=t[n];if(i<=0&&t.slice(n,n+a)===e)return n;"\\"===o?n++:"{"===o?i++:"}"===o&&i--,n++}return-1},a=/^\\begin{/,o=function(e,t){for(var n,i=[],o=new RegExp("("+t.map((function(e){return e.left.replace(/[-/\\^$*+?.()|[\]{}]/g,"\\$&")})).join("|")+")");-1!==(n=e.search(o));){n>0&&(i.push({type:"text",data:e.slice(0,n)}),e=e.slice(n));var l=t.findIndex((function(t){return e.startsWith(t.left)}));if(-1===(n=r(t[l].right,e,t[l].left.length)))break;var d=e.slice(0,n+t[l].right.length),s=a.test(d)?d:e.slice(t[l].left.length,n);i.push({type:"math",data:s,rawData:d,display:t[l].display}),e=e.slice(n+t[l].right.length)}return""!==e&&i.push({type:"text",data:e}),i},l=function(e,r){var n=o(e,r.delimiters);if(1===n.length&&"text"===n[0].type)return null;for(var i=document.createDocumentFragment(),a=0;a<n.length;a++)if("text"===n[a].type)i.appendChild(document.createTextNode(n[a].data));else{var l=document.createElement("span"),d=n[a].data;r.displayMode=n[a].display;try{r.preProcess&&(d=r.preProcess(d)),t().render(d,l,r)}catch(e){if(!(e instanceof t().ParseError))throw e;r.errorCallback("KaTeX auto-render: Failed to parse `"+n[a].data+"` with ",e),i.appendChild(document.createTextNode(n[a].rawData));continue}i.appendChild(l)}return i},d=function e(t,r){for(var n=0;n<t.childNodes.length;n++){var i=t.childNodes[n];if(3===i.nodeType){for(var a=i.textContent,o=i.nextSibling,d=0;o&&o.nodeType===Node.TEXT_NODE;)a+=o.textContent,o=o.nextSibling,d++;var s=l(a,r);if(s){for(var f=0;f<d;f++)i.nextSibling.remove();n+=s.childNodes.length-1,t.replaceChild(s,i)}else n+=d}else 1===i.nodeType&&function(){var t=" "+i.className+" ";-1===r.ignoredTags.indexOf(i.nodeName.toLowerCase())&&r.ignoredClasses.every((function(e){return-1===t.indexOf(" "+e+" ")}))&&e(i,r)}()}},s=function(e,t){if(!e)throw new Error("No element provided to render");var r={};for(var n in t)t.hasOwnProperty(n)&&(r[n]=t[n]);r.delimiters=r.delimiters||[{left:"$$",right:"$$",display:!0},{left:"\\(",right:"\\)",display:!1},{left:"\\begin{equation}",right:"\\end{equation}",display:!0},{left:"\\begin{align}",right:"\\end{align}",display:!0},{left:"\\begin{alignat}",right:"\\end{alignat}",display:!0},{left:"\\begin{gather}",right:"\\end{gather}",display:!0},{left:"\\begin{CD}",right:"\\end{CD}",display:!0},{left:"\\[",right:"\\]",display:!0}],r.ignoredTags=r.ignoredTags||["script","noscript","style","textarea","pre","code","option"],r.ignoredClasses=r.ignoredClasses||[],r.errorCallback=r.errorCallback||console.error,r.macros=r.macros||{},d(e,r)}}(),i=i.default}()}));
--- a/public/katex/fonts/KaTeX_AMS-Regular.ttf
+++ b/public/katex/fonts/KaTeX_AMS-Regular.ttf
--- a/public/katex/fonts/KaTeX_AMS-Regular.woff
+++ b/public/katex/fonts/KaTeX_AMS-Regular.woff
--- a/public/katex/fonts/KaTeX_AMS-Regular.woff2
+++ b/public/katex/fonts/KaTeX_AMS-Regular.woff2
--- a/public/katex/fonts/KaTeX_Caligraphic-Bold.ttf
+++ b/public/katex/fonts/KaTeX_Caligraphic-Bold.ttf
--- a/public/katex/fonts/KaTeX_Caligraphic-Bold.woff
+++ b/public/katex/fonts/KaTeX_Caligraphic-Bold.woff
--- a/public/katex/fonts/KaTeX_Caligraphic-Bold.woff2
+++ b/public/katex/fonts/KaTeX_Caligraphic-Bold.woff2
--- a/public/katex/fonts/KaTeX_Caligraphic-Regular.ttf
+++ b/public/katex/fonts/KaTeX_Caligraphic-Regular.ttf
--- a/public/katex/fonts/KaTeX_Caligraphic-Regular.woff
+++ b/public/katex/fonts/KaTeX_Caligraphic-Regular.woff
--- a/public/katex/fonts/KaTeX_Caligraphic-Regular.woff2
+++ b/public/katex/fonts/KaTeX_Caligraphic-Regular.woff2
--- a/public/katex/fonts/KaTeX_Fraktur-Bold.ttf
+++ b/public/katex/fonts/KaTeX_Fraktur-Bold.ttf
--- a/public/katex/fonts/KaTeX_Fraktur-Bold.woff
+++ b/public/katex/fonts/KaTeX_Fraktur-Bold.woff
--- a/public/katex/fonts/KaTeX_Fraktur-Bold.woff2
+++ b/public/katex/fonts/KaTeX_Fraktur-Bold.woff2
--- a/public/katex/fonts/KaTeX_Fraktur-Regular.ttf
+++ b/public/katex/fonts/KaTeX_Fraktur-Regular.ttf
--- a/public/katex/fonts/KaTeX_Fraktur-Regular.woff
+++ b/public/katex/fonts/KaTeX_Fraktur-Regular.woff
--- a/public/katex/fonts/KaTeX_Fraktur-Regular.woff2
+++ b/public/katex/fonts/KaTeX_Fraktur-Regular.woff2
--- a/public/katex/fonts/KaTeX_Main-Bold.ttf
+++ b/public/katex/fonts/KaTeX_Main-Bold.ttf
--- a/public/katex/fonts/KaTeX_Main-Bold.woff
+++ b/public/katex/fonts/KaTeX_Main-Bold.woff
--- a/public/katex/fonts/KaTeX_Main-Bold.woff2
+++ b/public/katex/fonts/KaTeX_Main-Bold.woff2
--- a/public/katex/fonts/KaTeX_Main-BoldItalic.ttf
+++ b/public/katex/fonts/KaTeX_Main-BoldItalic.ttf
--- a/public/katex/fonts/KaTeX_Main-BoldItalic.woff
+++ b/public/katex/fonts/KaTeX_Main-BoldItalic.woff
--- a/public/katex/fonts/KaTeX_Main-BoldItalic.woff2
+++ b/public/katex/fonts/KaTeX_Main-BoldItalic.woff2
--- a/public/katex/fonts/KaTeX_Main-Italic.ttf
+++ b/public/katex/fonts/KaTeX_Main-Italic.ttf
--- a/public/katex/fonts/KaTeX_Main-Italic.woff
+++ b/public/katex/fonts/KaTeX_Main-Italic.woff
--- a/public/katex/fonts/KaTeX_Main-Italic.woff2
+++ b/public/katex/fonts/KaTeX_Main-Italic.woff2
--- a/public/katex/fonts/KaTeX_Main-Regular.ttf
+++ b/public/katex/fonts/KaTeX_Main-Regular.ttf
--- a/public/katex/fonts/KaTeX_Main-Regular.woff
+++ b/public/katex/fonts/KaTeX_Main-Regular.woff
--- a/public/katex/fonts/KaTeX_Main-Regular.woff2
+++ b/public/katex/fonts/KaTeX_Main-Regular.woff2
--- a/public/katex/fonts/KaTeX_Math-BoldItalic.ttf
+++ b/public/katex/fonts/KaTeX_Math-BoldItalic.ttf
--- a/public/katex/fonts/KaTeX_Math-BoldItalic.woff
+++ b/public/katex/fonts/KaTeX_Math-BoldItalic.woff
--- a/public/katex/fonts/KaTeX_Math-BoldItalic.woff2
+++ b/public/katex/fonts/KaTeX_Math-BoldItalic.woff2
--- a/public/katex/fonts/KaTeX_Math-Italic.ttf
+++ b/public/katex/fonts/KaTeX_Math-Italic.ttf
--- a/public/katex/fonts/KaTeX_Math-Italic.woff
+++ b/public/katex/fonts/KaTeX_Math-Italic.woff
--- a/public/katex/fonts/KaTeX_Math-Italic.woff2
+++ b/public/katex/fonts/KaTeX_Math-Italic.woff2
--- a/public/katex/fonts/KaTeX_SansSerif-Bold.ttf
+++ b/public/katex/fonts/KaTeX_SansSerif-Bold.ttf
--- a/public/katex/fonts/KaTeX_SansSerif-Bold.woff
+++ b/public/katex/fonts/KaTeX_SansSerif-Bold.woff
--- a/public/katex/fonts/KaTeX_SansSerif-Bold.woff2
+++ b/public/katex/fonts/KaTeX_SansSerif-Bold.woff2
--- a/public/katex/fonts/KaTeX_SansSerif-Italic.ttf
+++ b/public/katex/fonts/KaTeX_SansSerif-Italic.ttf
--- a/public/katex/fonts/KaTeX_SansSerif-Italic.woff
+++ b/public/katex/fonts/KaTeX_SansSerif-Italic.woff
--- a/public/katex/fonts/KaTeX_SansSerif-Italic.woff2
+++ b/public/katex/fonts/KaTeX_SansSerif-Italic.woff2
--- a/public/katex/fonts/KaTeX_SansSerif-Regular.ttf
+++ b/public/katex/fonts/KaTeX_SansSerif-Regular.ttf
--- a/public/katex/fonts/KaTeX_SansSerif-Regular.woff
+++ b/public/katex/fonts/KaTeX_SansSerif-Regular.woff
--- a/public/katex/fonts/KaTeX_SansSerif-Regular.woff2
+++ b/public/katex/fonts/KaTeX_SansSerif-Regular.woff2
--- a/public/katex/fonts/KaTeX_Script-Regular.ttf
+++ b/public/katex/fonts/KaTeX_Script-Regular.ttf
--- a/public/katex/fonts/KaTeX_Script-Regular.woff
+++ b/public/katex/fonts/KaTeX_Script-Regular.woff
--- a/public/katex/fonts/KaTeX_Script-Regular.woff2
+++ b/public/katex/fonts/KaTeX_Script-Regular.woff2
--- a/public/katex/fonts/KaTeX_Size1-Regular.ttf
+++ b/public/katex/fonts/KaTeX_Size1-Regular.ttf
--- a/public/katex/fonts/KaTeX_Size1-Regular.woff
+++ b/public/katex/fonts/KaTeX_Size1-Regular.woff
--- a/public/katex/fonts/KaTeX_Size1-Regular.woff2
+++ b/public/katex/fonts/KaTeX_Size1-Regular.woff2
--- a/public/katex/fonts/KaTeX_Size2-Regular.ttf
+++ b/public/katex/fonts/KaTeX_Size2-Regular.ttf
--- a/public/katex/fonts/KaTeX_Size2-Regular.woff
+++ b/public/katex/fonts/KaTeX_Size2-Regular.woff
--- a/public/katex/fonts/KaTeX_Size2-Regular.woff2
+++ b/public/katex/fonts/KaTeX_Size2-Regular.woff2
--- a/public/katex/fonts/KaTeX_Size3-Regular.ttf
+++ b/public/katex/fonts/KaTeX_Size3-Regular.ttf
--- a/public/katex/fonts/KaTeX_Size3-Regular.woff
+++ b/public/katex/fonts/KaTeX_Size3-Regular.woff
--- a/public/katex/fonts/KaTeX_Size3-Regular.woff2
+++ b/public/katex/fonts/KaTeX_Size3-Regular.woff2
--- a/public/katex/fonts/KaTeX_Size4-Regular.ttf
+++ b/public/katex/fonts/KaTeX_Size4-Regular.ttf
--- a/public/katex/fonts/KaTeX_Size4-Regular.woff
+++ b/public/katex/fonts/KaTeX_Size4-Regular.woff
--- a/public/katex/fonts/KaTeX_Size4-Regular.woff2
+++ b/public/katex/fonts/KaTeX_Size4-Regular.woff2
--- a/public/katex/fonts/KaTeX_Typewriter-Regular.ttf
+++ b/public/katex/fonts/KaTeX_Typewriter-Regular.ttf
--- a/public/katex/fonts/KaTeX_Typewriter-Regular.woff
+++ b/public/katex/fonts/KaTeX_Typewriter-Regular.woff
--- a/public/katex/fonts/KaTeX_Typewriter-Regular.woff2
+++ b/public/katex/fonts/KaTeX_Typewriter-Regular.woff2
--- a/public/katex/katex.min.css
+++ b/public/katex/katex.min.css
--- a/public/katex/katex.min.js
+++ b/public/katex/katex.min.js
--- a/public/question.js
+++ b/public/question.js
@ -0,0 +1,12 @@
 const doRender = () => {
    renderMathInElement(document.body, {
        delimiters: [
            { left: '$$', right: '$$', display: true },
            { left: '\\[', right: '\\]', display: true },
            { left: '$', right: '$', display: false },
            { left: '\\(', right: '\\)', display: false },
        ],
    })
 }
 doRender();
--- a/templates/question.html
+++ b/templates/question.html
@ -7,10 +7,18 @@
        <link rel="stylesheet" href="/static/comments.css" />
        <meta
            http-equiv="Content-Security-Policy"
-            content="default-src 'none'; style-src 'self'; script-src 'none'; img-src {{ .imagePolicy }};"
+            content="default-src 'none'; style-src 'self'; script-src 'self'; img-src {{ .imagePolicy }};"
        />
        <meta name="description" content="{{ .question.ShortenedBody }}..." />
        {{ template "sharedHead.html" }}
        <link rel="stylesheet" href="/static/katex/katex.min.css">
        <!-- The loading of KaTeX is deferred to speed up page rendering -->
        <script defer src="/static/katex/katex.min.js"></script>
        <!-- To automatically render math in text elements, include the auto-render extension: -->
        <script defer src="/static/katex/contrib/auto-render.min.js"></script>
        <script defer src="/static/question.js" type="text/javascript"></script>
 </head>
    <body>
        <div class="parent">
		`@ -0,0 +1 @@`
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