docs/gremlint/src/reportWebVitals.ts

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 *
 *   http://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.
 */

import { MetricType } from 'web-vitals';

const reportWebVitals = (onPerfEntry?: (metric: MetricType) => void) => {
  if (onPerfEntry && onPerfEntry instanceof Function) {
    import('web-vitals').then(({ onCLS, onFCP, onINP, onLCP, onTTFB }) => {
      onCLS(onPerfEntry);
      onFCP(onPerfEntry);
      onINP(onPerfEntry);
      onLCP(onPerfEntry);
      onTTFB(onPerfEntry);
    });
  }
};

export default reportWebVitals;