From 0ea419300162bfc78f294c22a12046028e6605a7 Mon Sep 17 00:00:00 2001 From: hakimel Date: Thu, 28 Oct 2021 13:41:57 +0200 Subject: [PATCH] add @burgerga's math plugin with MathJax2, MathJax3 and KaTeX support #2559 --- examples/math.html | 11 +++-- package-lock.json | 12 ++--- plugin/math/katex.js | 87 +++++++++++++++++++++++++++++++++ plugin/math/math.esm.js | 2 +- plugin/math/math.js | 2 +- plugin/math/mathjax2.js | 89 ++++++++++++++++++++++++++++++++++ plugin/math/mathjax3.js | 77 +++++++++++++++++++++++++++++ plugin/math/plugin.js | 104 ++++++---------------------------------- 8 files changed, 283 insertions(+), 101 deletions(-) create mode 100755 plugin/math/katex.js create mode 100644 plugin/math/mathjax2.js create mode 100644 plugin/math/mathjax3.js mode change 100755 => 100644 plugin/math/plugin.js diff --git a/examples/math.html b/examples/math.html index 5861a71..d27779a 100644 --- a/examples/math.html +++ b/examples/math.html @@ -182,8 +182,7 @@ history: true, transition: 'linear', - math: { - // mathjax: 'https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js', + mathjax2: { config: 'TeX-AMS_HTML-full', TeX: { Macros: { @@ -193,7 +192,13 @@ } }, - plugins: [ RevealMath ] + // There are three typesetters available + // RevealMath.MathJax2 (default) + // RevealMath.MathJax3 + // RevealMath.KaTeX + // + // More info at https://revealjs.com/math/ + plugins: [ RevealMath.MathJax2 ] }); diff --git a/package-lock.json b/package-lock.json index f7039d4..96c9835 100644 --- a/package-lock.json +++ b/package-lock.json @@ -2227,9 +2227,9 @@ } }, "node_modules/caniuse-lite": { - "version": "1.0.30001228", - "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001228.tgz", - "integrity": "sha512-QQmLOGJ3DEgokHbMSA8cj2a+geXqmnpyOFT0lhQV6P3/YOJvGDEwoedcwxEQ30gJIwIIunHIicunJ2rzK5gB2A==", + "version": "1.0.30001272", + "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001272.tgz", + "integrity": "sha512-DV1j9Oot5dydyH1v28g25KoVm7l8MTxazwuiH3utWiAS6iL/9Nh//TGwqFEeqqN8nnWYQ8HHhUq+o4QPt9kvYw==", "dev": true, "funding": { "type": "opencollective", @@ -11296,9 +11296,9 @@ "dev": true }, "caniuse-lite": { - "version": "1.0.30001228", - "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001228.tgz", - "integrity": "sha512-QQmLOGJ3DEgokHbMSA8cj2a+geXqmnpyOFT0lhQV6P3/YOJvGDEwoedcwxEQ30gJIwIIunHIicunJ2rzK5gB2A==", + "version": "1.0.30001272", + "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001272.tgz", + "integrity": "sha512-DV1j9Oot5dydyH1v28g25KoVm7l8MTxazwuiH3utWiAS6iL/9Nh//TGwqFEeqqN8nnWYQ8HHhUq+o4QPt9kvYw==", "dev": true }, "chalk": { diff --git a/plugin/math/katex.js b/plugin/math/katex.js new file mode 100755 index 0000000..29b05b7 --- /dev/null +++ b/plugin/math/katex.js @@ -0,0 +1,87 @@ +/** + * A plugin which enables rendering of math equations inside + * of reveal.js slides. Essentially a thin wrapper for KaTeX. + * + * @author Hakim El Hattab + * @author Gerhard Burger + */ +export const KaTeX = () => { + let deck; + + let defaultOptions = { + version: 'latest', + delimiters: [ + {left: '$', right: '$', display: false}, + {left: '$$', right: '$$', display: true}, + {left: '\\(', right: '\\)', display: false}, + {left: '\\[', right: '\\]', display: true} + ], + ignoredTags: ['script', 'noscript', 'style', 'textarea', 'pre'] + } + + const loadCss = src => { + let link = document.createElement('link'); + link.rel = 'stylesheet'; + link.href = src; + document.head.appendChild(link); + }; + + /** + * Loads a JavaScript file and returns a Promise for when it is loaded + * Credits: https://aaronsmith.online/easily-load-an-external-script-using-javascript/ + */ + const loadScript = src => { + return new Promise((resolve, reject) => { + const script = document.createElement('script') + script.type = 'text/javascript' + script.onload = resolve + script.onerror = reject + script.src = src + document.head.append(script) + }) + }; + + async function loadScripts(urls) { + for(const url of urls) { + await loadScript(url); + } + } + + return { + id: 'katex', + + init: function (reveal) { + + deck = reveal; + + let revealOptions = deck.getConfig().katex || {}; + + let options = {...defaultOptions, ...revealOptions}; + const {local, version, extensions, ...katexOptions} = options; + + let baseUrl = options.local || 'https://cdn.jsdelivr.net/npm/katex'; + let versionString = options.local ? '' : '@' + options.version; + + let cssUrl = baseUrl + versionString + '/dist/katex.min.css'; + let katexUrl = baseUrl + versionString + '/dist/katex.min.js'; + let mhchemUrl = baseUrl + versionString + '/dist/contrib/mhchem.min.js' + let karUrl = baseUrl + versionString + '/dist/contrib/auto-render.min.js'; + + let katexScripts = [katexUrl]; + if(options.extensions && options.extensions.includes("mhchem")) { + katexScripts.push(mhchemUrl); + } + katexScripts.push(karUrl); + + loadCss(cssUrl); + + // For some reason dynamically loading with defer attribute doesn't result in the expected behavior, the below code does + loadScripts(katexScripts).then(() => { + renderMathInElement(document.body, katexOptions); + deck.layout(); + }); + + } + } + +}; diff --git a/plugin/math/math.esm.js b/plugin/math/math.esm.js index 716c114..90724e0 100644 --- a/plugin/math/math.esm.js +++ b/plugin/math/math.esm.js @@ -1 +1 @@ -function e(e,t){var n=Object.keys(e);if(Object.getOwnPropertySymbols){var 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