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chore: add docs for experimental 'watch mode' (#33988)

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Max Schmitt 2024-12-13 10:38:27 -08:00 committed by GitHub
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CONTRIBUTING.md
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@ -26,6 +26,16 @@ npm run watch
npx playwright install
```
**Experimental dev mode with Hot Module Replacement for recorder/trace-viewer/UI Mode**
```
PW_HMR=1 npm run watch
PW_HMR=1 npx playwright show-trace
PW_HMR=1 npm run ctest -- --ui
PW_HMR=1 npx playwright codegen
PW_HMR=1 npx playwright show-report
```
Playwright is a multi-package repository that uses npm workspaces. For browser APIs, look at [`packages/playwright-core`](https://github.com/microsoft/playwright/blob/main/packages/playwright-core). For test runner, see [`packages/playwright`](https://github.com/microsoft/playwright/blob/main/packages/playwright).
Note that some files are generated by the build, so the watch process might override your changes if done in the wrong file. For example, TypeScript types for the API are generated from the [`docs/src`](https://github.com/microsoft/playwright/blob/main/docs/src).