feat: use go tool

node_modules/micromark-extension-math/lib/html.js

@@ -0,0 +1,84 @@
+/**
+ * @import {HtmlOptions as Options} from 'micromark-extension-math'
+ * @import {HtmlExtension} from 'micromark-util-types'
+ */
+
+import katex from 'katex';
+const renderToString = katex.renderToString;
+
+/**
+ * Create an extension for `micromark` to support math when serializing to
+ * HTML.
+ *
+ * > 👉 **Note**: this uses KaTeX to render math.
+ *
+ * @param {Options | null | undefined} [options={}]
+ *   Configuration (default: `{}`).
+ * @returns {HtmlExtension}
+ *   Extension for `micromark` that can be passed in `htmlExtensions`, to
+ *   support math when serializing to HTML.
+ */
+export function mathHtml(options) {
+  return {
+    enter: {
+      mathFlow() {
+        this.lineEndingIfNeeded();
+        this.tag('<div class="math math-display">');
+      },
+      mathFlowFenceMeta() {
+        this.buffer();
+      },
+      mathText() {
+        // Double?
+        this.tag('<span class="math math-inline">');
+        this.buffer();
+      }
+    },
+    exit: {
+      mathFlow() {
+        const value = this.resume();
+        this.tag(math(value.replace(/(?:\r?\n|\r)$/, ''), true));
+        this.tag('</div>');
+        this.setData('mathFlowOpen');
+        this.setData('slurpOneLineEnding');
+      },
+      mathFlowFence() {
+        // After the first fence.
+        if (!this.getData('mathFlowOpen')) {
+          this.setData('mathFlowOpen', true);
+          this.setData('slurpOneLineEnding', true);
+          this.buffer();
+        }
+      },
+      mathFlowFenceMeta() {
+        this.resume();
+      },
+      mathFlowValue(token) {
+        this.raw(this.sliceSerialize(token));
+      },
+      mathText() {
+        const value = this.resume();
+        this.tag(math(value, false));
+        this.tag('</span>');
+      },
+      mathTextData(token) {
+        this.raw(this.sliceSerialize(token));
+      }
+    }
+  };
+
+  /**
+   * @param {string} value
+   *   Math text.
+   * @param {boolean} displayMode
+   *   Whether the math is in display mode.
+   * @returns {string}
+   *   HTML.
+   */
+  function math(value, displayMode) {
+    return renderToString(value, {
+      ...options,
+      displayMode
+    });
+  }
+}