fix(language-core): template language of .md files should be markdown

close #4299

Author: johnsoncodehk

packages/language-core/lib/plugins/file-md.ts

@@ -54,6 +54,7 @@ const plugin: VueLanguagePlugin = () => {
 			const sfc = parse(toString(codes));
 
 			if (sfc.descriptor.template) {
+				sfc.descriptor.template.lang = 'md';
 				transformRange(sfc.descriptor.template);
 			}
 			if (sfc.descriptor.script) {

packages/language-core/lib/plugins/vue-template-html.ts

@@ -16,7 +16,7 @@ const plugin: VueLanguagePlugin = ({ modules }) => {
 
 		compileSFCTemplate(lang, template, options) {
 
-			if (lang === 'html') {
+			if (lang === 'html' || lang === 'md') {
 
 				const compiler = modules['@vue/compiler-dom'];
 

packages/language-service/lib/plugins/vue-template.ts

@@ -35,16 +35,26 @@ export function create(
 			},
 		};
 	};
-	const baseServicePlugin = mode === 'pug' ? createPugService : createHtmlService;
-	const baseService = baseServicePlugin({
-		getCustomData() {
-			return [
-				...customData,
-				...extraCustomData,
-			];
-		},
-		onDidChangeCustomData,
-	});
+	const baseService = mode === 'pug'
+		? createPugService({
+			getCustomData() {
+				return [
+					...customData,
+					...extraCustomData,
+				];
+			},
+			onDidChangeCustomData,
+		})
+		: createHtmlService({
+			documentSelector: ['html', 'markdown'],
+			getCustomData() {
+				return [
+					...customData,
+					...extraCustomData,
+				];
+			},
+			onDidChangeCustomData,
+		});
 
 	return {
 		name: `vue-template (${mode})`,