Used to upload a file through the file dialog.
<FormFileUpload
accept="image/*"
onChange={ (e) => console.log('new image', e) }
render={ ( { openFileDialog } ) => (
<div>
<p>Upload an image below: </p>
<Button isSecondary onClick={ openFileDialog }>
Upload image
</Button>
</div>
)}
/>
Which files are accepted can be set as a prop.