appearable section #elixir-heex

appearable_section.heex

  <style>
    @keyframes expander_appear {
      100% { opacity: 1; max-height: 300px}
    }
    .expander {
      animation: expander_appear 900ms 10ms ease-out forwards;
      opacity: 1; max-height:0px; overflow: hidden;
    }
  </style>

  <section :if={cond} class="expander">
  Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.
  </section>