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Provide a watching build mode that writes to the disk in development #1070

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@andreypopp

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@andreypopp

See #1018 (comment) for a discussion which leads to the creation of this issue.

I propose adding a new command (working name build-dev) which watches for changes and rebuild the bundle (effectively, given the current CRA implementation, it should execute webpack --watch), then writes it onto filesystem.

The main motivation is an easier integration path with non-Node.js dev servers: such servers could just serve continuously updating bundle from the filesystem.

The only desired configuration options is an --output, which could probably be specified via a command line argument:

% npm run build-dev -- --output ../static/www

Alternative command name suggestions:

  • watch
  • build-watch

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