init...

themes/butterfly/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)
+    }
+
+    btf.addGlobalFn('themeChange', runMermaid, 'mermaid')
+
+    window.pjax ? loadMermaid() : document.addEventListener('DOMContentLoaded', loadMermaid)
+  })()