fix theme...

themes/anzhiyu/layout/includes/third-party/math/index.pug

@@ -0,0 +1,18 @@
+if theme.mathjax && theme.mathjax.enable
+  if theme.mathjax.per_page
+    if is_post() || is_page()
+      include ./mathjax.pug
+  else
+    if page.mathjax
+      include ./mathjax.pug
+
+if theme.katex && theme.katex.enable
+  if theme.katex.per_page
+    if is_post() || is_page()
+      include ./katex.pug
+  else
+    if page.katex
+      include ./katex.pug
+
+if theme.mermaid.enable
+  include ./mermaid.pug

themes/anzhiyu/layout/includes/third-party/math/katex.pug

@@ -0,0 +1,9 @@
+link(rel="stylesheet" type="text/css" href=url_for(theme.asset.katex))
+script(src=url_for(theme.asset.katex_copytex))
+script.
+  (() => {
+    document.querySelectorAll('#article-container span.katex-display').forEach(item => {
+      anzhiyu.wrap(item, 'div', { class: 'katex-wrap'})
+    })
+  })()
+  

themes/anzhiyu/layout/includes/third-party/math/mathjax.pug

@@ -0,0 +1,38 @@
+//- Mathjax 3
+script.
+  if (!window.MathJax) {
+    window.MathJax = {
+      tex: {
+        inlineMath: [['$', '$'], ['\\(', '\\)']],
+        tags: 'ams'
+      },
+      chtml: {
+        scale: 1.1
+      },
+      options: {
+        renderActions: {
+          findScript: [10, doc => {
+            for (const node of document.querySelectorAll('script[type^="math/tex"]')) {
+              const display = !!node.type.match(/; *mode=display/)
+              const math = new doc.options.MathItem(node.textContent, doc.inputJax[0], display)
+              const text = document.createTextNode('')
+              node.parentNode.replaceChild(text, node)
+              math.start = {node: text, delim: '', n: 0}
+              math.end = {node: text, delim: '', n: 0}
+              doc.math.push(math)
+            }
+          }, '']
+        }
+      }
+    }
+    
+    const script = document.createElement('script')
+    script.src = '!{url_for(theme.asset.mathjax)}'
+    script.id = 'MathJax-script'
+    script.async = true
+    document.head.appendChild(script)
+  } else {
+    MathJax.startup.document.state(0)
+    MathJax.texReset()
+    MathJax.typesetPromise()
+  }

themes/anzhiyu/layout/includes/third-party/math/mermaid.pug

@@ -0,0 +1,38 @@
+script.
+  (() => {
+    const $mermaid = document.querySelectorAll('#article-container .mermaid-wrap')
+    if ($mermaid.length === 0) return
+    const runMermaid = () => {
+      window.loadMermaid = true
+      const theme = document.documentElement.getAttribute('data-theme') === 'dark' ? '!{theme.mermaid.theme.dark}' : '!{theme.mermaid.theme.light}'
+
+      Array.from($mermaid).forEach((item, index) => {
+        const mermaidSrc = item.firstElementChild
+        const mermaidThemeConfig = '%%{init:{ \'theme\':\'' + theme + '\'}}%%\n'
+        const mermaidID = 'mermaid-' + index
+        const mermaidDefinition = mermaidThemeConfig + mermaidSrc.textContent
+
+        const renderFn = mermaid.render(mermaidID, mermaidDefinition)
+
+        const renderV10 = () => {
+          renderFn.then(({svg}) => {
+            mermaidSrc.insertAdjacentHTML('afterend', svg)
+          })
+        }
+
+        const renderV9 = svg => {
+          mermaidSrc.insertAdjacentHTML('afterend', svg)
+        }
+
+        typeof renderFn === 'string' ? renderV9(renderFn) : renderV10()
+      })
+    }
+
+    const loadMermaid = () => {
+      window.loadMermaid ? runMermaid() : getScript('!{url_for(theme.asset.mermaid)}').then(runMermaid)
+    }
+
+    anzhiyu.addGlobalFn('themeChange', runMermaid, 'mermaid')
+
+    window.pjax ? loadMermaid() : document.addEventListener('DOMContentLoaded', loadMermaid)
+  })()