···

       
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[file input](https://developer.mozilla.org/en-US/docs/Web/API/File/Using_files_from_web_applications),

     

       
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for example.

     

       
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+
       
> **Note:** If you are using your own version of `File` and `Blob` ensure you are properly extending the

     

       
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+
       
> so it can be properly identified as a file.

     

       
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+
       


     

       
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The `@urql/core@4` package supports File Uploads natively, so we won't have to do any installation

     

       
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or setup work. When `urql` sees a `File` or a `Blob` anywhere in your `variables`, it switches to

     

       
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a `multipart/form-data` request, converts the request to a `FormData` object, according to the