48 lines
2.1 KiB
Markdown
48 lines
2.1 KiB
Markdown
# Application Debugging
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Whenever your Electron application is not behaving the way you wanted it to,
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an array of debugging tools might help you find coding errors, performance
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bottlenecks, or optimization opportunities.
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## Renderer Process
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The most comprehensive tool to debug individual renderer processes is the
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Chromium Developer Toolset. It is available for all renderer processes,
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including instances of `BrowserWindow`, `BrowserView`, and `WebView`. You
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can open them programmatically by calling the `openDevTools()` API on the
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`webContents` of the instance:
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```javascript
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const { BrowserWindow } = require('electron')
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const win = new BrowserWindow()
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win.webContents.openDevTools()
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```
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Google offers [excellent documentation for their developer tools][devtools].
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We recommend that you make yourself familiar with them - they are usually one
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of the most powerful utilities in any Electron Developer's tool belt.
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## Main Process
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Debugging the main process is a bit trickier, since you cannot open
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developer tools for them. The Chromium Developer Tools can [be used
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to debug Electron's main process][node-inspect] thanks to a closer collaboration
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between Google / Chrome and Node.js, but you might encounter oddities like
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`require` not being present in the console.
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For more information, see the [Debugging the Main Process documentation][main-debug].
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[node-inspect]: https://nodejs.org/en/docs/inspector/
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[devtools]: https://developer.chrome.com/devtools
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[main-debug]: ./debugging-main-process.md
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## V8 Crashes
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If the V8 context crashes, the DevTools will display this message.
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`DevTools was disconnected from the page. Once page is reloaded, DevTools will automatically reconnect.`
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Chromium logs can be enabled via the `ELECTRON_ENABLE_LOGGING` environment variable. For more information, see the [environment variables documentation](../api/environment-variables.md#electron_enable_logging).
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Alternatively, the command line argument `--enable-logging` can be passed. More information is available in the [command line switches documentation](../api/command-line-switches.md#--enable-loggingfile).
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