add mathjax support

cn/docs/javascripts/config.js

+window.MathJax = {
+    tex: {
+      inlineMath: [["\\(", "\\)"]],
+      displayMath: [["\\[", "\\]"]],
+      processEscapes: true,
+      processEnvironments: true
+    },
+    options: {
+      ignoreHtmlClass: ".*|",
+      processHtmlClass: "arithmatex"
+    }
+  };
+  
+  document$.subscribe(() => {
+    MathJax.typesetPromise()
+  })
+  
\ No newline at end of file

cn/mkdocs.yml

@@ -71,7 +71,8 @@ markdown_extensions:
   - markdown.extensions.meta
   - markdown.extensions.toc:
       permalink: true
-  - pymdownx.arithmatex
+  - pymdownx.arithmatex:
+      generic: true
   - pymdownx.betterem:
       smart_enable: all
   - pymdownx.caret
@@ -98,6 +99,11 @@ markdown_extensions:
       custom_checkbox: true
   - pymdownx.tilde
 
+extra_javascript:
+  - javascripts/config.js
+  - https://polyfill.io/v3/polyfill.min.js?features=es6
+  - https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
+
 nav:
     - 首页: index.md