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<form id="new_document_attachment" method="post">
<div class="actions"><input type="submit" name="commit" value="Submit" /></div>
<input type="file" id="document_attachment_doc" />
</form>
Run code snippet
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const form = document.getElementById("new_document_attachment");
const fileInput = document.getElementById("document_attachment_doc");
fileInput.addEventListener('change', () => {
form.submit();
});
window.addEventListener('paste', e => {
fileInput.files = e.clipboardData.files;
});