I added the attribute required
in input type="checkbox"
return (
<form onSubmit={handleSubmit} action="/questions" method="post">
<div>
<label name="agreed">
<input type="checkbox" required name="agreed" />
I agree
</label>
</div>
</form>
);
But when you click on the submit form button an error appears
An invalid form control with name='agreed' is not focusable.
I would like to see a standard browser warning. Is it real?