1 files changed, 34 insertions, 0 deletions
diff --git a/src/markdown-encode.ts b/src/markdown-encode.ts
new file mode 100644
index 000000000..0719aaa32
--- /dev/null
+++ b/src/markdown-encode.ts
@@ -0,0 +1,34 @@
+import type { HtmlExtension, Token } from 'micromark/dist/shared-types';
+
+const characterReferences = {
+  '"': 'quot',
+  '&': 'amp',
+  '<': 'lt',
+  '>': 'gt',
+  '{': 'lbrace',
+  '}': 'rbrace'
+};
+
+type EncodedChars = '"' | '&' | '<' | '>' | '{' | '}';
+
+function encode(value: string): string {
+  return value.replace(/["&<>{}]/g, (raw: string) => {
+    return '&' + characterReferences[raw as EncodedChars] + ';'
+  });
+}
+
+const plugin: HtmlExtension = {
+  exit: {
+    codeFlowValue() {
+      const token: Token = arguments[0];
+      const serialize = this.sliceSerialize as unknown as (t: Token) => string;
+      const raw = this.raw as unknown as (s: string) => void;
+      const value = serialize(token);
+      raw(encode(value));
+    }
+  }
+};
+
+export {
+  plugin as default
+};
+\ No newline at end of file