Exclude your mock data and other modules from your production bundle in SPFx
When creating solutions with SharePoint Framework, in many cases you might want to call some API endpoints. Like for instance the SharePoint rest API or Microsoft Graph. To speed up your development, testing and overcome issues like [CORS](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS) (cross-origin resource sharing). You might have implemented some mock data objects or mock services which return static data. > **Info**: more information about CORS
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