Improve event handling and refactor clear children in CKEditor

service.js

@@ -695,12 +695,14 @@ class BesCKService extends BesService {
     })
     this.ckEditorInstance.commands.get('undo').on('execute', () => {
       this.clearAllMistakes(this.scrollPanel)
+      this.clearChildren()
       setTimeout(() => {
         this.proof(hostElement)
       }, 500)
     })
     this.ckEditorInstance.commands.get('redo').on('execute', () => {
       this.clearAllMistakes(this.scrollPanel)
+      this.clearChildren()
       setTimeout(() => {
         this.proof(hostElement)
       }, 500)
@@ -717,6 +719,34 @@ class BesCKService extends BesService {
         window.dispatchEvent(new Event('resize'))
       }, 500)
     })
+    this.ckEditorInstance.commands.get('indent').on('execute', () => {
+      this.clearAllMistakes(this.scrollPanel)
+      this.clearChildren()
+      setTimeout(() => {
+        this.proof(hostElement)
+      }, 500)
+    })
+    this.ckEditorInstance.commands.get('outdent').on('execute', () => {
+      this.clearAllMistakes(this.scrollPanel)
+      this.clearChildren()
+      setTimeout(() => {
+        this.proof(hostElement)
+      }, 500)
+    })
+    this.ckEditorInstance.commands.get('numberedList').on('execute', () => {
+      this.clearAllMistakes(this.scrollPanel)
+      this.clearChildren()
+      setTimeout(() => {
+        this.proof(hostElement)
+      }, 500)
+    })
+    this.ckEditorInstance.commands.get('bulletedList').on('execute', () => {
+      this.clearAllMistakes(this.scrollPanel)
+      this.clearChildren()
+      setTimeout(() => {
+        this.proof(hostElement)
+      }, 500)
+    })
   }
 
   /**
@@ -767,11 +797,13 @@ class BesCKService extends BesService {
   }
 
   clearAllMistakes(el) {
-    if (el.children.length) {
-      for (let i = 0; i < el.children.length; i++) {
-        el.children[i].remove()
+    while (el.firstChild) {
+      el.removeChild(el.firstChild)
     }
   }
+
+  clearChildren() {
+    this.children = []
   }
 
   handleCKInput(hostElement, ckEditorInstance) {