1 files changed, 36 insertions, 0 deletions
diff --git a/src/compiler/markdown/micromark-encode.ts b/src/compiler/markdown/micromark-encode.ts
new file mode 100644
index 000000000..635ab3b54
--- /dev/null
+++ b/src/compiler/markdown/micromark-encode.ts
@@ -0,0 +1,36 @@
+import type { Token } from 'micromark/dist/shared-types';
+import type { MicromarkExtension, MicromarkExtensionContext } from '../../@types/micromark';
+
+const characterReferences = {
+  '"': 'quot',
+  '&': 'amp',
+  '<': 'lt',
+  '>': 'gt',
+  '{': 'lbrace',
+  '}': 'rbrace',
+};
+
+type EncodedChars = '"' | '&' | '<' | '>' | '{' | '}';
+
+/** Encode HTML entity */
+function encode(value: string): string {
+  return value.replace(/["&<>{}]/g, (raw: string) => {
+    return '&' + characterReferences[raw as EncodedChars] + ';';
+  });
+}
+
+/** Encode Markdown node */
+function encodeToken(this: MicromarkExtensionContext) {
+  const token: Token = arguments[0];
+  const value = this.sliceSerialize(token);
+  this.raw(encode(value));
+}
+
+const plugin: MicromarkExtension = {
+  exit: {
+    codeTextData: encodeToken,
+    codeFlowValue: encodeToken,
+  },
+};
+
+export { plugin as encodeMarkdown };