選完檔案後直接提交form 並隱藏submit button
<form method=post action="{{ url_for('make_prediction') }}" enctype=multipart/form-data>
<label class="btn btn-default btn-file">
Browse<input type="file" name=file style="display: none;" accept="image/*" onchange="this.form.submit();">
</label>
<button type="submit" style="display: none;"></button>
</form>
References
- https://stackoverflow.com/questions/4730666/post-immediately-after-select-a-file