close #240 fix block class to handle text node changes

src/record/mutation.ts

@@ -216,7 +216,10 @@ export default class MutationBuffer {
         m.removedNodes.forEach((n) => {
           const nodeId = mirror.getId(n as INode);
           const parentId = mirror.getId(m.target as INode);
-          if (isBlocked(n, this.blockClass)) {
+          if (
+            isBlocked(n, this.blockClass) ||
+            isBlocked(m.target, this.blockClass)
+          ) {
             return;
           }
           // removed node has not been serialized yet, just remove it from the Set

src/utils.ts

@@ -189,6 +189,10 @@ export function isBlocked(node: Node | null, blockClass: blockClass): boolean {
     }
     return needBlock || isBlocked(node.parentNode, blockClass);
   }
+  if (node.nodeType === node.TEXT_NODE) {
+    // check parent node since text node do not have class name
+    return isBlocked(node.parentNode, blockClass);
+  }
   return isBlocked(node.parentNode, blockClass);
 }