Question

When I have a submit button, it sends the form when I press enter.

Is the submit button necessary?

I am thinking of removing the button if it is unnecessary.

Answer 1

In a <form>, one can submit by pressing the Enter key when you have a text input but hide your submit button.

<form action="wherever">
    <input type="text" name="input" />
    <input type="submit" value="Submit" name="submit" style="display: none;" />
</form>

This type of buttonless interface may be useful in interfaces like a command prompt, but generally, users often recognize a form with a submit button.