{"version":3,"file":"observe.js","sources":["../../../../../src/metrics/web-vitals/lib/observe.ts"],"sourcesContent":["/*\n * Copyright 2020 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     https://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\ninterface PerformanceEntryMap {\n  event: PerformanceEventTiming[];\n  'first-input': PerformanceEventTiming[];\n  'layout-shift': LayoutShift[];\n  'largest-contentful-paint': LargestContentfulPaint[];\n  'long-animation-frame': PerformanceLongAnimationFrameTiming[];\n  paint: PerformancePaintTiming[];\n  navigation: PerformanceNavigationTiming[];\n  resource: PerformanceResourceTiming[];\n  // Sentry-specific change:\n  // We add longtask as a supported entry type as we use this in\n  // our `instrumentPerformanceObserver` function also observes 'longtask'\n  // entries.\n  longtask: PerformanceEntry[];\n  // Sentry-specific change:\n  // We add element as a supported entry type for ElementTiming API\n  element: PerformanceEntry[];\n}\n\n/**\n * Takes a performance entry type and a callback function, and creates a\n * `PerformanceObserver` instance that will observe the specified entry type\n * with buffering enabled and call the callback _for each entry_.\n *\n * This function also feature-detects entry support and wraps the logic in a\n * try/catch to avoid errors in unsupporting browsers.\n */\nexport const observe = <K extends keyof PerformanceEntryMap>(\n  type: K,\n  callback: (entries: PerformanceEntryMap[K]) => void,\n  opts: PerformanceObserverInit = {},\n): PerformanceObserver | undefined => {\n  try {\n    if (PerformanceObserver.supportedEntryTypes.includes(type)) {\n      const po = new PerformanceObserver(list => {\n        // Delay by a microtask to workaround a bug in Safari where the\n        // callback is invoked immediately, rather than in a separate task.\n        // See: https://github.com/GoogleChrome/web-vitals/issues/277\n        // eslint-disable-next-line @typescript-eslint/no-floating-promises\n        Promise.resolve().then(() => {\n          callback(list.getEntries() as PerformanceEntryMap[K]);\n        });\n      });\n      po.observe({ type, buffered: true, ...opts });\n      return po;\n    }\n  } catch {\n    // Do nothing.\n  }\n  return;\n};\n"],"names":[],"mappings":";;AA2CO,MAAM,UAAU,CACrB,IAAA,EACA,QAAA,EACA,IAAA,GAAgC,EAAC,KACG;AACpC,EAAA,IAAI;AACF,IAAA,IAAI,mBAAA,CAAoB,mBAAA,CAAoB,QAAA,CAAS,IAAI,CAAA,EAAG;AAC1D,MAAA,MAAM,EAAA,GAAK,IAAI,mBAAA,CAAoB,CAAA,IAAA,KAAQ;AAKzC,QAAA,OAAA,CAAQ,OAAA,EAAQ,CAAE,IAAA,CAAK,MAAM;AAC3B,UAAA,QAAA,CAAS,IAAA,CAAK,YAAsC,CAAA;AAAA,QACtD,CAAC,CAAA;AAAA,MACH,CAAC,CAAA;AACD,MAAA,EAAA,CAAG,QAAQ,EAAE,IAAA,EAAM,UAAU,IAAA,EAAM,GAAG,MAAM,CAAA;AAC5C,MAAA,OAAO,EAAA;AAAA,IACT;AAAA,EACF,CAAA,CAAA,MAAQ;AAAA,EAER;AACA,EAAA;AACF;;;;"}