lots of changes to switch to vue

public/components/PreviewOverlay.vue.js

@@ -0,0 +1,27 @@
+"use strict"
+
+// ingame component
+// shows the preview image
+
+export default {
+  name: 'preview-overlay',
+  template: `
+    <div class="overlay" @click="$emit('bgclick')">
+      <div class="preview">
+        <div class="img" :style="previewStyle"></div>
+      </div>
+    </div>`,
+  props: {
+    img: String,
+  },
+  emits: {
+    bgclick: null,
+  },
+  computed: {
+    previewStyle () {
+      return {
+        backgroundImage: `url('${this.img}')`,
+      }
+    },
+  },
+}