Merge from vscode 6e530127a1bb8ffbd1bfb77dc680c321dc0d71f5 (#6844)

extensions/markdown-language-features/preview-src/scroll-sync.ts

@@ -134,3 +134,12 @@ export function getEditorLineNumberForPageOffset(offset: number) {
 	}
 	return null;
 }
+
+/**
+ * Try to find the html element by using a fragment id
+ */
+export function getLineElementForFragment(fragment: string): CodeLineElement | undefined {
+	return getCodeLineElements().find((element) => {
+		return element.element.id === fragment;
+	});
+}