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99 lines
5.0 KiB
Markdown
99 lines
5.0 KiB
Markdown
---
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id: class-logger
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title: "Logger"
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---
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Playwright generates a lot of logs and they are accessible via the pluggable logger sink.
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```js
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const { chromium } = require('playwright'); // Or 'firefox' or 'webkit'.
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(async () => {
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const browser = await chromium.launch({
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logger: {
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isEnabled: (name, severity) => name === 'browser',
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log: (name, severity, message, args) => console.log(`${name} ${message}`)
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}
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});
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...
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})();
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```
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- [logger.isEnabled(name, severity)](api/class-logger.md#loggerisenabledname-severity)
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- [logger.log(name, severity, message, args, hints)](api/class-logger.md#loggerlogname-severity-message-args-hints)
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## logger.isEnabled(name, severity)
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- `name` <[string]> logger name
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- `severity` <"verbose"|"info"|"warning"|"error">
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- returns: <[boolean]>
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Determines whether sink is interested in the logger with the given name and severity.
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## logger.log(name, severity, message, args, hints)
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- `name` <[string]> logger name
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- `severity` <"verbose"|"info"|"warning"|"error">
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- `message` <[string]|[Error]> log message format
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- `args` <[Array]<[Object]>> message arguments
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- `hints` <[Object]> optional formatting hints
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- `color` <[string]> Optional preferred logger color.
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[Playwright]: api/class-playwright.md "Playwright"
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[Browser]: api/class-browser.md "Browser"
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[BrowserContext]: api/class-browsercontext.md "BrowserContext"
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[Page]: api/class-page.md "Page"
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[Frame]: api/class-frame.md "Frame"
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[ElementHandle]: api/class-elementhandle.md "ElementHandle"
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[JSHandle]: api/class-jshandle.md "JSHandle"
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[ConsoleMessage]: api/class-consolemessage.md "ConsoleMessage"
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[Dialog]: api/class-dialog.md "Dialog"
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[Download]: api/class-download.md "Download"
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[Video]: api/class-video.md "Video"
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[FileChooser]: api/class-filechooser.md "FileChooser"
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[Keyboard]: api/class-keyboard.md "Keyboard"
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[Mouse]: api/class-mouse.md "Mouse"
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[Touchscreen]: api/class-touchscreen.md "Touchscreen"
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[Request]: api/class-request.md "Request"
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[Response]: api/class-response.md "Response"
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[Selectors]: api/class-selectors.md "Selectors"
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[Route]: api/class-route.md "Route"
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[WebSocket]: api/class-websocket.md "WebSocket"
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[TimeoutError]: api/class-timeouterror.md "TimeoutError"
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[Accessibility]: api/class-accessibility.md "Accessibility"
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[Worker]: api/class-worker.md "Worker"
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[BrowserServer]: api/class-browserserver.md "BrowserServer"
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[BrowserType]: api/class-browsertype.md "BrowserType"
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[Logger]: api/class-logger.md "Logger"
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[ChromiumBrowser]: api/class-chromiumbrowser.md "ChromiumBrowser"
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[ChromiumBrowserContext]: api/class-chromiumbrowsercontext.md "ChromiumBrowserContext"
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[ChromiumCoverage]: api/class-chromiumcoverage.md "ChromiumCoverage"
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[CDPSession]: api/class-cdpsession.md "CDPSession"
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[FirefoxBrowser]: api/class-firefoxbrowser.md "FirefoxBrowser"
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[WebKitBrowser]: api/class-webkitbrowser.md "WebKitBrowser"
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[Array]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array "Array"
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[Buffer]: https://nodejs.org/api/buffer.html#buffer_class_buffer "Buffer"
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[ChildProcess]: https://nodejs.org/api/child_process.html "ChildProcess"
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[Element]: https://developer.mozilla.org/en-US/docs/Web/API/element "Element"
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[Error]: https://nodejs.org/api/errors.html#errors_class_error "Error"
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[Evaluation Argument]: ./core-concepts.md#evaluationargument "Evaluation Argument"
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[Map]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map "Map"
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[Object]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object "Object"
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[Promise]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise "Promise"
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[RegExp]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp "RegExp"
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[Serializable]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#Description "Serializable"
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[UIEvent.detail]: https://developer.mozilla.org/en-US/docs/Web/API/UIEvent/detail "UIEvent.detail"
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[URL]: https://nodejs.org/api/url.html "URL"
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[USKeyboardLayout]: ../src/usKeyboardLayout.ts "USKeyboardLayout"
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[UnixTime]: https://en.wikipedia.org/wiki/Unix_time "Unix Time"
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[boolean]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type "Boolean"
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[function]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function "Function"
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[iterator]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols "Iterator"
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[null]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/null "null"
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[number]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type "Number"
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[origin]: https://developer.mozilla.org/en-US/docs/Glossary/Origin "Origin"
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[selector]: https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors "selector"
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[Readable]: https://nodejs.org/api/stream.html#stream_class_stream_readable "Readable"
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[string]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type "string"
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[xpath]: https://developer.mozilla.org/en-US/docs/Web/XPath "xpath"
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