om/node_modules/rxjs/_esm2015/internal/scheduler/AnimationFrameAction.js

import { AsyncAction } from './AsyncAction';
export class AnimationFrameAction extends AsyncAction {
    constructor(scheduler, work) {
        super(scheduler, work);
        this.scheduler = scheduler;
        this.work = work;
    }
    requestAsyncId(scheduler, id, delay = 0) {
        if (delay !== null && delay > 0) {
            return super.requestAsyncId(scheduler, id, delay);
        }
        scheduler.actions.push(this);
        return scheduler.scheduled || (scheduler.scheduled = requestAnimationFrame(() => scheduler.flush(null)));
    }
    recycleAsyncId(scheduler, id, delay = 0) {
        if ((delay !== null && delay > 0) || (delay === null && this.delay > 0)) {
            return super.recycleAsyncId(scheduler, id, delay);
        }
        if (scheduler.actions.length === 0) {
            cancelAnimationFrame(id);
            scheduler.scheduled = undefined;
        }
        return undefined;
    }
}
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