HTML forms with multiple submit buttons
Most forms have a single submit button that will save the record when pressed.
Sometimes a form needs additional submit buttons like "accept" or "reject". Such buttons usually attempt a state transition while updating the record.
To process a form with multiple buttons, your server-side code will need to know which button was pressed. To do so you can give each submit button a different
[formaction] attribute. This will override the form's
[action] attribute and hence cause the browser to POST the form to another URL.
Below is an example of a form for a "story". It has three submit buttons.
<form action="/storys/5"> <!-- form fields here --> <button type="submit">Save changes</button> <button type="submit" formaction="/deals/5/accept">Accept story</button> <button type="submit" formaction="/deals/5/reject">Reject story</button> </form>
[formaction] attribute is supported in all browsers and IE11.
It is currently (0.62.1) not supported by Unpoly's form submission.
If you press enter on a field in a form it submits it using the first submit button in the form.