Added: Placeholder when uploading images

frontend/components/Editor/components/Image.js

@@ -1,13 +1,16 @@
 // @flow
 import React from 'react';
 import type { Props } from '../types';
+import styled from 'styled-components';
+
+const LoadingImage = styled.img`
+  opacity: .5;
+`;
 
 export default function Image({ attributes, node }: Props) {
-  return (
-    <img
-      {...attributes}
-      src={node.data.get('src')}
-      alt={node.data.get('alt')}
-    />
-  );
+  const loading = node.data.get('loading');
+  const Component = loading ? LoadingImage : 'img';
+  const src = node.data.get('inlineSrc') || node.data.get('src');
+
+  return <Component {...attributes} src={src} alt={node.data.get('alt')} />;
 }