Fixes #539 linter support, now checking YAML formats

web/cm_plugins/admonition.ts

@@ -27,7 +27,7 @@ class AdmonitionIconWidget extends WidgetType {
   toDOM(): HTMLElement {
     const outerDiv = document.createElement("div");
     outerDiv.classList.add("sb-admonition-icon");
-    outerDiv.addEventListener("click", (e) => {
+    outerDiv.addEventListener("click", () => {
       this.editorView.dispatch({
         selection: {
           anchor: this.pos,

web/cm_plugins/lint.ts

@@ -0,0 +1,11 @@
+import { Diagnostic, linter } from "@codemirror/lint";
+import type { Client } from "../client.ts";
+
+export function plugLinter(client: Client) {
+  return linter(async (): Promise<Diagnostic[]> => {
+    const results = (await client.dispatchAppEvent("editor:lint", {
+      name: client.currentPage!,
+    })).flat();
+    return results;
+  });
+}