Add default append in insertComponent

src/dom_components/view/ComponentTextView.js

@@ -149,26 +149,28 @@ export default ComponentView.extend({
       const cmps = model.components();
       const newCmps = [];
 
-      model.components().forEach(cmp => {
-        if (cmp === textModel) {
-          const type = 'textnode';
-          const cnt = cmp.get('content');
-          newCmps.push({ type, content: cnt.slice(0, offset) });
-          newCmps.push(content);
-          newCmps.push({ type, content: cnt.slice(offset) });
-        } else {
-          newCmps.push(cmp);
-        }
-      });
-
-      const result = newCmps.filter(Boolean);
-      const index = result.indexOf(content);
-      cmps.reset(result);
-
-      return cmps.at(index);
+      if (textModel && textModel.is?.('textnode')) {
+        model.components().forEach(cmp => {
+          if (cmp === textModel) {
+            const type = 'textnode';
+            const cnt = cmp.get('content');
+            newCmps.push({ type, content: cnt.slice(0, offset) });
+            newCmps.push(content);
+            newCmps.push({ type, content: cnt.slice(offset) });
+          } else {
+            newCmps.push(cmp);
+          }
+        });
+
+        const result = newCmps.filter(Boolean);
+        const index = result.indexOf(content);
+        cmps.reset(result);
+
+        return cmps.at(index);
+      }
     }
 
-    return null;
+    return model.append(content);
   },
 
   /**

src/utils/Sorter.js

@@ -84,7 +84,7 @@ export default Backbone.View.extend({
    * Triggered when the offset of the editro is changed
    */
   updateOffset() {
-    const offset = this.em.get('canvasOffset') || {};
+    const offset = this.em?.get('canvasOffset') || {};
     this.offTop = offset.top;
     this.offLeft = offset.left;
   },
@@ -99,7 +99,9 @@ export default Backbone.View.extend({
   },
 
   updateTextViewCursorPosition(e) {
-    const Canvas = this.em.get('Canvas');
+    const { em } = this;
+    if (!em) return;
+    const Canvas = em.get('Canvas');
     const targetDoc = Canvas.getDocument();
     let range = null;
 
@@ -304,8 +306,8 @@ export default Backbone.View.extend({
     this.onStart({
       sorter: this,
       target: srcModel,
-      parent: srcModel && srcModel.parent(),
-      index: srcModel && srcModel.index(),
+      parent: srcModel && srcModel.parent?.(),
+      index: srcModel && srcModel.index?.(),
     });
 
     // Avoid strange effects on dragging