snapshot of https://github.com/makeplane/plane.git @ d868349a55de79979eb8b98701bf1702c67ad634 (2026-09-15)

apps/web/core/lib/idle-task.ts

@@ -0,0 +1,54 @@
+/**
+ * Copyright (c) 2023-present Plane Software, Inc. and contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ * See the LICENSE file for details.
+ */
+
+export type IdleTaskHandle = {
+  cancel: () => void;
+};
+
+const requestIdleFallback = (callback: IdleRequestCallback, options?: IdleRequestOptions): number => {
+  const start = Date.now();
+
+  return globalThis.setTimeout(() => {
+    callback({
+      didTimeout: false,
+      timeRemaining: () => Math.max(0, 50 - (Date.now() - start)),
+    });
+  }, options?.timeout ?? 1) as unknown as number;
+};
+
+const cancelIdleFallback = (id: number) => {
+  globalThis.clearTimeout(id);
+};
+
+export const requestIdle = (callback: IdleRequestCallback, options?: IdleRequestOptions): number => {
+  if (typeof globalThis.requestIdleCallback === "function") return globalThis.requestIdleCallback(callback, options);
+
+  return requestIdleFallback(callback, options);
+};
+
+export const cancelIdle = (id: number) => {
+  if (typeof globalThis.cancelIdleCallback === "function") return globalThis.cancelIdleCallback(id);
+
+  return cancelIdleFallback(id);
+};
+
+export const installIdleCallbackPolyfill = () => {
+  if (typeof globalThis === "undefined") return;
+
+  globalThis.requestIdleCallback = globalThis.requestIdleCallback ?? requestIdleFallback;
+  globalThis.cancelIdleCallback = globalThis.cancelIdleCallback ?? cancelIdleFallback;
+};
+
+/**
+ * Schedule lightweight work for idle time and return a cancel handle.
+ * Falls back to setTimeout when requestIdleCallback is unavailable.
+ */
+export const runIdleTask = (callback: IdleRequestCallback): IdleTaskHandle => {
+  const idleId = requestIdle(callback, { timeout: 300 });
+  return {
+    cancel: () => cancelIdle(idleId),
+  };
+};