View HTML markup
<form method="POST" novalidate action="?/">
<div>
<label for="file" id="file">File w/ dropzone
</label>
<span id="file-hint">
Choose file with .csv
</span>
<input dir="auto" is="ds-input-file" id="file" accept=".csv,text/csv" type="file">
</div>
<button type="button">
Submit
</button>
</form>