first ver

src/components/still-image/still-image.vue

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+<template>
+  <div class='still-image' :class='{ animated: animated }' >
+    <canvas ref="canvas" v-if="animated"></canvas>
+    <img ref="src" :src="src" :referrerpolicy="referrerpolicy" v-on:load="drawCanvas"/>
+  </div>
+</template>
+
+<script src="./still-image.js"></script>
+
+<style lang="scss">
+@import '../../_variables.scss';
+.still-image {
+    position: relative;
+    
+    &:hover canvas {
+        display: none;
+    }
+    
+    &.animated {
+        &:hover::before,
+        img {
+            visibility: hidden
+        }
+        
+        &:hover img {
+            visibility: visible
+        }
+
+        &::before {
+            content: 'gif';
+            position: absolute;
+            top: 5px;
+            left: 5px;
+            background: rgba(255,255,255,.5);
+            display: block;
+            padding: 2px;
+            z-index: 2;
+        }
+    }
+
+    canvas {
+        position: absolute;
+        top: 0;
+        bottom: 0;
+        left: 0;
+        right: 0;
+        width: 100%;
+        height: 100%;
+    }
+}
+</style>