Tilføj name til alle felter, så name matcher deres respektive for/id.
<form>
<label for="first_name">First name</label>
<input type="text" id="first_name" />
<p>Please enter a value</p>
<label for="last_name">Last name</label>
<input type="text" id="last_name" />
<p>Please enter a value</p>
<label for="email">Email</label>
<input type="email" id="email" />
<p>Please enter a value</p>
<label for="password">Password</label>
<input type="password" id="password" />
<p>Please enter a value</p>
<label for="terms">
<input type="checkbox" id="terms" value="yes" />
Accept terms
</label>
<button>Sign up</button>
</form>