To make an HTML button perform a POST request, we add a name and value attribute to the button in the form.
For instance, we write
<form action="" method="post">
<button name="foo" value="upvote">Upvote</button>
</form>
to add a button with the name and value attributes to make it submit the form.
The form’s method attribute is set to post so a post request is made.
