Basster · March 4, 2019 11:21 · Mar 4, 2019
diff --git a/emptyness-dependency-free.js b/emptyness-dependency-free.js
@@ -0,0 +1,39 @@
+export default class Emptyness {
+  constructor(editor) {
+    this.editor = editor;
+
+  }
+
+  init() {
+    const doc = this.editor.model.document;
+    const view = this.editor.ui.view.editable;
+
+    if (!view) {
+      return;
+    }
+
+    view.set( 'isEmpty', !documentHasContent(doc) );
+
+    view.listenTo(doc, 'change:data', () => {
+      view.set( 'isEmpty', !documentHasContent(doc) );
+    } );
+
+    if (view.isRendered === true) {
+      return;
+    }
+
+    const bind = view.bindTemplate;
+
+    view.extendTemplate( {
+      attributes: {
+        class: [
+          bind.if( 'isEmpty', 'ck-editor__is-empty' )
+        ]
+      }
+    } );
+  }
+}
+
+function documentHasContent(doc) {
+  return doc.model.hasContent(doc.getRoot());
+}