flash effect on ctrl enter

packages/react/src/components/CodeMirror6.jsx

@@ -7,6 +7,39 @@ import { javascript } from '@codemirror/lang-javascript';
 // import { materialPalenight } from 'codemirror6-themes';
 import { materialPalenight } from '../themes/material-palenight';
 
+export const setFlash = StateEffect.define();
+const flashField = StateField.define({
+  create() {
+    return Decoration.none;
+  },
+  update(flash, tr) {
+    try {
+      for (let e of tr.effects) {
+        if (e.is(setFlash)) {
+          if (e.value) {
+            const mark = Decoration.mark({ attributes: { style: `background-color: #FFCA2880` } });
+            flash = Decoration.set([mark.range(0, tr.newDoc.length)]);
+          } else {
+            flash = Decoration.set([]);
+          }
+        }
+      }
+      return flash;
+    } catch (err) {
+      console.warn('flash error', err);
+      return flash;
+    }
+  },
+  provide: (f) => EditorView.decorations.from(f),
+});
+
+export const flash = (view) => {
+  view.dispatch({ effects: setFlash.of(true) });
+  setTimeout(() => {
+    view.dispatch({ effects: setFlash.of(false) });
+  }, 200);
+};
+
 export const setHighlights = StateEffect.define();
 const highlightField = StateField.define({
   create() {
@@ -61,6 +94,7 @@ export default function CodeMirror({ value, onChange, onViewChanged, onCursor, o
           javascript(),
           materialPalenight,
           highlightField,
+          flashField,
           // theme, language, ...
         ]}
       />