There is a kind of dropzone where the file is uploaded temporary.
Then i need to submit the form to upload it definitively.
I’m wondering if it’s possible to do the action of submit and upload the file without submitting the form ?
And then if i can interact in backend (via a filter, or action) with this file ? (without submitting the form).
The multi-file upload field will upload the file to the server before the form is submitted. Here is a quick screen recording showing the uploaded file after uploading with the multi-file upload field, before submitting the form: