There’s no simple_form/1 in phoenix 1.8

So this code

<div>
  <.simple_form
    for={@form}
    id="promo-form"
    phx-change="validate"
    phx-submit="save"
  >
    <.input field={@form[:first_name]} type="text" label="First Name" />
    <.input
      field={@form[:email]}
      type="email"
      label="Email"
    />
    <:actions>
      <.button phx-disable-with="Sending...">Send Promo</.button>
    </:actions>
  </.simple_form>
</div>

Doesn’t’ work.

Changing simple_form to form gets you halfway to a fix, you also have to remove the actions slot. I’ve not tested in 1.7.* release series but this works in 1.8.

<div>
  <.form
    for={@form}
    id="promo-form"
    phx-change="validate"
    phx-submit="save"
  >
    <.input field={@form[:first_name]} type="text" label="First Name" />
    <.input
      field={@form[:email]}
      type="email"
      label="Email"
    />
    <.button phx-disable-with="Sending...">Send Promo</.button>
  </.form>
</div>

edit: a little later on on page 169 simple form is also referenced again as a place to add entry information for the file uploads (which is also in the older <%= style of syntax.