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docs: add note about workaround for tests hanging #229

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docs: add note about workaround for tests hanging #229

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Expand Up @@ -54,6 +54,12 @@ You can pass list of browsers as a CLI argument too:
$ karma start --browsers Chrome,Chrome_without_security
```

## Hanging tests

When interactive (i.e. non-headless) Chrome is used, tests may appear to hang if the browser window is hidden or minimized, due to Chrome throttling tabs that are not in the foreground.

To work around the issue for the scenario where the browser window is hidden, use a custom launcher and pass the `--disable-backgrounding-occluded-windows` flag. There is currently no workaround for the case where the browser is minimized. See [#228](https://github.com/karma-runner/karma-chrome-launcher/issues/228) for more information.

## Headless Chromium with Puppeteer

The Chrome DevTools team created [Puppeteer](https://github.com/GoogleChrome/puppeteer) - it will automatically install Chromium for all
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