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/// <reference types="./Debug.d.ts" />/** * Copyright 2020 Google Inc. All rights reserved. * * 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 * *     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. *//** * A debug function that can be used in any environment. * * @remarks * If used in Node, it falls back to the * {@link https://www.npmjs.com/package/debug | debug module}. In the browser it * uses `console.log`. * * In Node, use the `DEBUG` environment variable to control logging: * * ``` * DEBUG=* // logs all channels * DEBUG=foo // logs the `foo` channel * DEBUG=foo* // logs any channels starting with `foo` * ``` * * In the browser, set `window.__PUPPETEER_DEBUG` to a string: * * ``` * window.__PUPPETEER_DEBUG='*'; // logs all channels * window.__PUPPETEER_DEBUG='foo'; // logs the `foo` channel * window.__PUPPETEER_DEBUG='foo*'; // logs any channels starting with `foo` * ``` * * @example * * ``` * const log = debug('Page'); * * log('new page created') * // logs "Page: new page created" * ``` * * @param prefix - this will be prefixed to each log. * @returns a function that can be called to log to that debug channel. * * @internal */export const debug = (prefix) => {  return (...logArgs) => {    const debugLevel = globalThis.__PUPPETEER_DEBUG;    if (!debugLevel) {      return;    }    const everythingShouldBeLogged = debugLevel === "*";    const prefixMatchesDebugLevel = everythingShouldBeLogged || /**     * If the debug level is `foo*`, that means we match any prefix that     * starts with `foo`. If the level is `foo`, we match only the prefix     * `foo`.     */      (debugLevel.endsWith("*")        ? prefix.startsWith(debugLevel)        : prefix === debugLevel);    if (!prefixMatchesDebugLevel) {      return;    }    // eslint-disable-next-line no-console    console.log(`${prefix}:`, ...logArgs);  };};//# sourceMappingURL=Debug.js.map