refactor: provide type declaration of highlight.js

2 files changed, 10 insertions, 8 deletions

diff --git a/nuldoc-src/docbook/to_html.ts b/nuldoc-src/docbook/to_html.ts
index 7c21036..c824780 100644
--- a/nuldoc-src/docbook/to_html.ts
+++ b/nuldoc-src/docbook/to_html.ts
@@ -1,4 +1,5 @@
-import hljs from "hljs/highlight.min.js";
+// @deno-types="../types/highlight-js.d.ts"
+import hljs from "npm:highlight.js";
 import { Document } from "./document.ts";
 import { DocBookError } from "../errors.ts";
 import {
@@ -299,13 +300,8 @@ function highlightPrograms(doc: Document) {
     }
     const sourceCode = (codeElement.children[0] as Text).content;
 
-    const validLanguage =
-      (hljs as { getLanguage: (s: string) => string }).getLanguage(language)
-        ? language
-        : "plaintext";
-    const highlighted = (hljs as {
-      highlight: (s: string, o: { language: string }) => { value: string };
-    }).highlight(sourceCode, { language: validLanguage }).value;
+    const highlighted =
+      hljs.highlight(sourceCode, { language: language }).value;
 
     (codeElement.children[0] as Text).content = highlighted;
     codeElement.attributes.set("class", "highlight");
diff --git a/nuldoc-src/types/highlight-js.d.ts b/nuldoc-src/types/highlight-js.d.ts
new file mode 100644
index 0000000..312cd06
--- /dev/null
+++ b/nuldoc-src/types/highlight-js.d.ts
@@ -0,0 +1,6 @@
+declare module "highlight.js" {
+  function highlight(
+    code: string,
+    options: { language: string },
+  ): { value: string };
+}