[issue-779]: Grammarly conflicts (#956)

* grammarly conflicts

* update

* upd bundle

docs/CHANGELOG.md

@@ -10,6 +10,7 @@
 - `Fix` — On selection from end to start backspace is working as expected now [#869](https://github.com/codex-team/editor.js/issues/869)
 — `Fix` — Fix flipper with empty dom iterator [#926](https://github.com/codex-team/editor.js/issues/926)
 - `Fix` — Normalize node before walking through children at `isEmpty` method [943](https://github.com/codex-team/editor.js/issues/943)
+— `Fix` — Fixed Grammarly conflict [#779](https://github.com/codex-team/editor.js/issues/779)
 
 ### 2.15.1
 

src/components/block.ts

@@ -180,10 +180,20 @@ export default class Block {
    * @return {HTMLElement}
    */
   get pluginsContent(): HTMLElement {
-    const pluginsContent = this.holder.querySelector(`.${Block.CSS.content}`);
+    const blockContentNodes = this.holder.querySelector(`.${Block.CSS.content}`);
 
-    if (pluginsContent && pluginsContent.childNodes.length) {
-      return pluginsContent.childNodes[0] as HTMLElement;
+    if (blockContentNodes && blockContentNodes.childNodes.length) {
+      /**
+       * Editors Block content can contain different Nodes from extensions
+       * We use DOM isExtensionNode to ignore such Nodes and return first Block that does not match filtering list
+       */
+      for (let child = blockContentNodes.childNodes.length - 1; child >= 0; child--) {
+        const contentNode = blockContentNodes.childNodes[child];
+
+        if (!$.isExtensionNode(contentNode)) {
+          return contentNode as HTMLElement;
+        }
+      }
     }
 
     return null;

src/components/dom.ts

@@ -535,4 +535,16 @@ export default class Dom {
     if (typeof element === 'string') { return document.getElementById(element); }
     return element;
   }
+
+  /**
+   * Method checks passed Node if it is some extension Node
+   * @param {Node} node - any node
+   */
+  public static isExtensionNode(node: Node): boolean {
+    const extensions = [
+      'GRAMMARLY-EXTENSION',
+    ];
+
+    return node && extensions.includes(node.nodeName);
+  }
 }