semaphore/routes/_components/NonAutoplayGifv.html

<div class="non-autoplay-gifv" style="width: {{width}}px; height: {{height}}px;"
     on:mouseover="onMouseOver(event)"
     ref:node
>
  {{#if playing}}
    <video
      style="background: url({{staticSrc}});"
      class="{{class}}"
      aria-label="{{label}}"
      poster="{{poster}}"
      src="{{src}}"
      width="{{width}}"
      height="{{height}}"
      autoplay
      muted
      loop
      playsinline
      />
  {{else}}
    <img class="{{class}} {{imageError ? 'image-error' : ''}}"
         alt="{{label}}"
         src="{{imageError ? oneTransparentPixel : staticSrc}}"
         width="{{width}}"
         height="{{height}}"
         on:imgLoad="set({imageLoaded: true})"
         on:imgLoadError="set({imageError: true})"
         />
  {{/if}}
</div>
<style>
  .non-autoplay-gifv {
    cursor: zoom-in;
  }
</style>
<script>
  import { mouseover } from '../_utils/events'
  import { imgLoad, imgLoadError } from '../_utils/events'
  import { ONE_TRANSPARENT_PIXEL } from '../_static/media'

  export default {
    methods: {
      onMouseOver(mouseOver) {
        this.set({playing: mouseOver})
      }
    },
    events: {
      mouseover,
      imgLoad,
      imgLoadError
    },
    data: () => ({
      oneTransparentPixel: ONE_TRANSPARENT_PIXEL
    })
  }
</script>