38 lines
872 B
JavaScript
38 lines
872 B
JavaScript
/**
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* Takes a performance entry type and a callback function, and creates a
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* `PerformanceObserver` instance that will observe the specified entry type
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* with buffering enabled and call the callback _for each entry_.
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*
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* This function also feature-detects entry support and wraps the logic in a
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* try/catch to avoid errors in unsupporting browsers.
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*/
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const observe = (
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type,
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callback,
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opts,
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) => {
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try {
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if (PerformanceObserver.supportedEntryTypes.includes(type)) {
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const po = new PerformanceObserver(list => {
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callback(list.getEntries() );
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});
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po.observe(
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Object.assign(
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{
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type,
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buffered: true,
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},
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opts || {},
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) ,
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);
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return po;
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}
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} catch (e) {
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// Do nothing.
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}
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return;
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};
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export { observe };
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//# sourceMappingURL=observe.js.map
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