Marc Mintel
5397309103
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55 lines
2.1 KiB
Plaintext
55 lines
2.1 KiB
Plaintext
import { WINDOW } from '../../../types.js';
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import { addPageListener, removePageListener } from './globalListeners.js';
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import { runOnce } from './runOnce.js';
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/*
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* Copyright 2024 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* Runs the passed callback during the next idle period, or immediately
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* if the browser's visibility state is (or becomes) hidden.
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*/
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const whenIdleOrHidden = (cb) => {
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const rIC = WINDOW.requestIdleCallback || WINDOW.setTimeout;
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// If the document is hidden, run the callback immediately, otherwise
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// race an idle callback with the next `visibilitychange` event.
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if (WINDOW.document?.visibilityState === 'hidden') {
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cb();
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} else {
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// eslint-disable-next-line no-param-reassign
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cb = runOnce(cb);
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addPageListener('visibilitychange', cb, { once: true, capture: true });
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// sentry: we use pagehide instead of directly listening to visibilitychange
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// because some browsers we still support (Safari <14.4) don't fully support
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// `visibilitychange` or have known bugs w.r.t the `visibilitychange` event.
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// TODO(v11): remove this once we drop support for Safari <14.4
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addPageListener('pagehide', cb, { once: true, capture: true });
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rIC(() => {
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cb();
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// Remove the above event listener since no longer required.
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// See: https://github.com/GoogleChrome/web-vitals/issues/622
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removePageListener('visibilitychange', cb, { capture: true });
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// TODO(v11): remove this once we drop support for Safari <14.4
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removePageListener('pagehide', cb, { capture: true });
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});
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}
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};
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export { whenIdleOrHidden };
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//# sourceMappingURL=whenIdleOrHidden.js.map
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