整理した

src/client/app/mobile/views/components/media-image.vue

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+<template>
+<a class="mk-media-image" :href="image.url" target="_blank" :style="style" :title="image.name"></a>
+</template>
+
+<script lang="ts">
+import Vue from 'vue';
+
+export default Vue.extend({
+	props: ['image'],
+	computed: {
+		style(): any {
+			return {
+				'background-color': this.image.properties.avgColor ? `rgb(${this.image.properties.avgColor.join(',')})` : 'transparent',
+				'background-image': `url(${this.image.url}?thumbnail&size=512)`
+			};
+		}
+	}
+});
+</script>
+
+<style lang="stylus" scoped>
+.mk-media-image
+	display block
+	overflow hidden
+	width 100%
+	height 100%
+	background-position center
+	background-size cover
+	border-radius 4px
+
+</style>