update

node_modules/rxjs/_esm2015/scheduler/AnimationFrameAction.js

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+import { AsyncAction } from './AsyncAction';
+import { AnimationFrame } from '../util/AnimationFrame';
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @ignore
+ * @extends {Ignored}
+ */
+export class AnimationFrameAction extends AsyncAction {
+    constructor(scheduler, work) {
+        super(scheduler, work);
+        this.scheduler = scheduler;
+        this.work = work;
+    }
+    requestAsyncId(scheduler, id, delay = 0) {
+        // If delay is greater than 0, request as an async action.
+        if (delay !== null && delay > 0) {
+            return super.requestAsyncId(scheduler, id, delay);
+        }
+        // Push the action to the end of the scheduler queue.
+        scheduler.actions.push(this);
+        // If an animation frame has already been requested, don't request another
+        // one. If an animation frame hasn't been requested yet, request one. Return
+        // the current animation frame request id.
+        return scheduler.scheduled || (scheduler.scheduled = AnimationFrame.requestAnimationFrame(scheduler.flush.bind(scheduler, null)));
+    }
+    recycleAsyncId(scheduler, id, delay = 0) {
+        // If delay exists and is greater than 0, or if the delay is null (the
+        // action wasn't rescheduled) but was originally scheduled as an async
+        // action, then recycle as an async action.
+        if ((delay !== null && delay > 0) || (delay === null && this.delay > 0)) {
+            return super.recycleAsyncId(scheduler, id, delay);
+        }
+        // If the scheduler queue is empty, cancel the requested animation frame and
+        // set the scheduled flag to undefined so the next AnimationFrameAction will
+        // request its own.
+        if (scheduler.actions.length === 0) {
+            AnimationFrame.cancelAnimationFrame(id);
+            scheduler.scheduled = undefined;
+        }
+        // Return undefined so the action knows to request a new async id if it's rescheduled.
+        return undefined;
+    }
+}
+//# sourceMappingURL=AnimationFrameAction.js.map