Marc Mintel
5397309103
Some checks failed
Build & Deploy / 🔍 Prepare (push) Successful in 20s
Build & Deploy / 🧪 QA (push) Failing after 34s
Build & Deploy / 🏗️ Build (push) Has started running
Build & Deploy / 🚀 Deploy (push) Has been cancelled
Build & Deploy / 🧪 Smoke Test (push) Has been cancelled
Build & Deploy / ⚡ Lighthouse (push) Has been cancelled
Build & Deploy / 🔔 Notify (push) Has been cancelled
52 lines
1.7 KiB
Plaintext
52 lines
1.7 KiB
Plaintext
/*
|
|
* Copyright 2020 Google LLC
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* https://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
/**
|
|
* Takes a performance entry type and a callback function, and creates a
|
|
* `PerformanceObserver` instance that will observe the specified entry type
|
|
* with buffering enabled and call the callback _for each entry_.
|
|
*
|
|
* This function also feature-detects entry support and wraps the logic in a
|
|
* try/catch to avoid errors in unsupporting browsers.
|
|
*/
|
|
const observe = (
|
|
type,
|
|
callback,
|
|
opts = {},
|
|
) => {
|
|
try {
|
|
if (PerformanceObserver.supportedEntryTypes.includes(type)) {
|
|
const po = new PerformanceObserver(list => {
|
|
// Delay by a microtask to workaround a bug in Safari where the
|
|
// callback is invoked immediately, rather than in a separate task.
|
|
// See: https://github.com/GoogleChrome/web-vitals/issues/277
|
|
// eslint-disable-next-line @typescript-eslint/no-floating-promises
|
|
Promise.resolve().then(() => {
|
|
callback(list.getEntries() );
|
|
});
|
|
});
|
|
po.observe({ type, buffered: true, ...opts });
|
|
return po;
|
|
}
|
|
} catch {
|
|
// Do nothing.
|
|
}
|
|
return;
|
|
};
|
|
|
|
export { observe };
|
|
//# sourceMappingURL=observe.js.map
|