From 08f8e3b4a4879dd7c91c16fbce80c4f2bc5e357f Mon Sep 17 00:00:00 2001
From: Jacky Zhao <j.zhao2k19@gmail.com>
Date: Mon, 10 Jul 2023 02:32:24 +0000
Subject: [PATCH] docs + various polish

---
 quartz/plugins/transformers/latex.ts |   62 ++++++++++++++++++-------------
 1 files changed, 36 insertions(+), 26 deletions(-)

diff --git a/quartz/plugins/transformers/latex.ts b/quartz/plugins/transformers/latex.ts
index 73bd07d..7feeda8 100644
--- a/quartz/plugins/transformers/latex.ts
+++ b/quartz/plugins/transformers/latex.ts
@@ -1,33 +1,43 @@
 import remarkMath from "remark-math"
 import rehypeKatex from 'rehype-katex'
+import rehypeMathjax from 'rehype-mathjax/svg.js'
 import { QuartzTransformerPlugin } from "../types"
 
-export const Katex: QuartzTransformerPlugin = () => ({
-  name: "Katex",
-  markdownPlugins() {
-    return [remarkMath]
-  },
-  htmlPlugins() {
-    return [
-      [rehypeKatex, {
-        output: 'html',
-      }]
-    ]
-  },
-  externalResources() {
-    return {
-      css: [
-        // base css
-        "https://cdn.jsdelivr.net/npm/katex@0.16.0/dist/katex.min.css",
-      ],
-      js: [
-        {
-          // fix copy behaviour: https://github.com/KaTeX/KaTeX/blob/main/contrib/copy-tex/README.md
-          src: "https://cdn.jsdelivr.net/npm/katex@0.16.7/dist/contrib/copy-tex.min.js",
-          loadTime: "afterDOMReady",
-          contentType: 'external'
-        }
+interface Options {
+  renderEngine: 'katex' | 'mathjax'
+}
+
+export const Latex: QuartzTransformerPlugin<Options> = (opts?: Options) => {
+  const engine = opts?.renderEngine ?? 'katex'
+  return {
+    name: "Latex",
+    markdownPlugins() {
+      return [remarkMath]
+    },
+    htmlPlugins() {
+      return [
+        engine === 'katex'
+          ? [rehypeKatex, { output: 'html' }]
+          : [rehypeMathjax]
       ]
+    },
+    externalResources() {
+      return engine === 'katex'
+        ? {
+          css: [
+            // base css
+            "https://cdn.jsdelivr.net/npm/katex@0.16.0/dist/katex.min.css",
+          ],
+          js: [
+            {
+              // fix copy behaviour: https://github.com/KaTeX/KaTeX/blob/main/contrib/copy-tex/README.md
+              src: "https://cdn.jsdelivr.net/npm/katex@0.16.7/dist/contrib/copy-tex.min.js",
+              loadTime: "afterDOMReady",
+              contentType: 'external'
+            }
+          ]
+        }
+        : {}
     }
   }
-})
+}

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