Remove some non null assertion operator

package.json

@@ -34,4 +34,4 @@
     "postpublish": "rm -rf packages/core/README.md && rm -rf packages/react/README.md",
     "clean": "lerna run --stream clean"
   }
-}
+}

packages/core/src/extensions/FilePanel/FilePanelPlugin.ts

@@ -71,8 +71,10 @@ export class FilePanelView<I extends InlineContentSchema, S extends StyleSchema>
     if (this.state?.show) {
       const blockElement = this.pmView.root.querySelector(
         `[data-node-type="blockContainer"][data-id="${this.state.block.id}"]`
-      )!;
-
+      );
+      if (!blockElement) {
+        return;
+      }
       this.state.referencePos = blockElement.getBoundingClientRect();
       this.emitUpdate();
     }
@@ -86,8 +88,10 @@ export class FilePanelView<I extends InlineContentSchema, S extends StyleSchema>
     if (!this.state?.show && pluginState.block && this.editor.isEditable) {
       const blockElement = this.pmView.root.querySelector(
         `[data-node-type="blockContainer"][data-id="${pluginState.block.id}"]`
-      )!;
-
+      );
+      if (!blockElement) {
+        return;
+      }
       this.state = {
         show: true,
         referencePos: blockElement.getBoundingClientRect(),
@@ -157,7 +161,7 @@ export class FilePanelProsemirrorPlugin<
       props: {
         handleKeyDown: (_view, event: KeyboardEvent) => {
           if (event.key === "Escape" && this.shown) {
-            this.view!.closeMenu();
+            this.view?.closeMenu();
             return true;
           }
           return false;
@@ -189,5 +193,5 @@ export class FilePanelProsemirrorPlugin<
     return this.on("update", callback);
   }
 
-  public closeMenu = () => this.view!.closeMenu();
+  public closeMenu = () => this.view?.closeMenu();
 }

packages/core/src/extensions/FormattingToolbar/FormattingToolbarPlugin.ts

@@ -205,7 +205,6 @@ export class FormattingToolbarView implements PluginView {
 
     if (isNodeSelection(selection)) {
       const node = this.pmView.nodeDOM(from) as HTMLElement;
-
       if (node) {
         return node.getBoundingClientRect();
       }

packages/core/src/extensions/SideMenu/SideMenuPlugin.ts

@@ -267,7 +267,7 @@ export class SideMenuView<
   // When false, the drag handle with be just to the left of the element
   // TODO: Is there any case where we want this to be false?
   private horizontalPosAnchoredAtRoot: boolean;
-  private horizontalPosAnchor: number;
+  private horizontalPosAnchor: number | undefined;
 
   private hoveredBlock: HTMLElement | undefined;
 
@@ -290,9 +290,12 @@ export class SideMenuView<
     };
 
     this.horizontalPosAnchoredAtRoot = true;
-    this.horizontalPosAnchor = (
-      this.pmView.dom.firstChild! as HTMLElement
-    ).getBoundingClientRect().x;
+
+    if (this.pmView.dom.firstChild) {
+      this.horizontalPosAnchor = (
+        this.pmView.dom.firstChild as HTMLElement
+      ).getBoundingClientRect().x;
+    }
 
     this.pmView.root.addEventListener(
       "drop",
@@ -337,8 +340,12 @@ export class SideMenuView<
     // size/position, so we get the boundingRect of the first child (i.e. the
     // blockGroup that wraps all blocks in the editor) for more accurate side
     // menu placement.
+    if (!this.pmView.dom.firstChild) {
+      return;
+    }
+
     const editorBoundingBox = (
-      this.pmView.dom.firstChild! as HTMLElement
+      this.pmView.dom.firstChild as HTMLElement
     ).getBoundingClientRect();
 
     this.horizontalPosAnchor = editorBoundingBox.x;
@@ -441,7 +448,7 @@ export class SideMenuView<
     if (!pos || pos.inside === -1) {
       const evt = new Event("drop", event) as any;
       const editorBoundingBox = (
-        this.pmView.dom.firstChild! as HTMLElement
+        this.pmView.dom.firstChild as HTMLElement
       ).getBoundingClientRect();
       evt.clientX =
         event.clientX < editorBoundingBox.left ||
@@ -474,10 +481,10 @@ export class SideMenuView<
       top: event.clientY,
     });
 
-    if (!pos || pos.inside === -1) {
+    if (!pos || (pos.inside === -1 && this.pmView.dom.firstChild)) {
       const evt = new Event("dragover", event) as any;
       const editorBoundingBox = (
-        this.pmView.dom.firstChild! as HTMLElement
+        this.pmView.dom.firstChild as HTMLElement
       ).getBoundingClientRect();
       evt.clientX = editorBoundingBox.left + editorBoundingBox.width / 2;
       evt.clientY = event.clientY;
@@ -555,8 +562,8 @@ export class SideMenuView<
   };
 
   onScroll = () => {
-    if (this.state?.show) {
-      const blockContent = this.hoveredBlock!.firstChild as HTMLElement;
+    if (this.state?.show && this.hoveredBlock?.firstChild) {
+      const blockContent = this.hoveredBlock.firstChild as HTMLElement;
       const blockContentBoundingBox = blockContent.getBoundingClientRect();
 
       this.state.referencePos = new DOMRect(
@@ -624,7 +631,11 @@ export class SideMenuView<
       this.emitUpdate(this.state);
     }
 
-    const blockContent = this.hoveredBlock!.firstChild! as HTMLElement;
+    if (!this.hoveredBlock?.firstChild) {
+      return;
+    }
+
+    const blockContent = this.hoveredBlock.firstChild as HTMLElement;
     const blockContentBoundingBox = blockContent.getBoundingClientRect();
 
     const pos = this.pmView.posAtCoords({

packages/core/src/extensions/SuggestionMenu/SuggestionPlugin.ts

@@ -54,7 +54,10 @@ class SuggestionMenuView<
       const decorationNode = this.rootEl?.querySelector(
         `[data-decoration-id="${this.pluginState!.decorationId}"]`
       );
-      this.state.referencePos = decorationNode!.getBoundingClientRect();
+      if (!decorationNode) {
+        return;
+      }
+      this.state.referencePos = decorationNode.getBoundingClientRect();
       this.emitUpdate(this.pluginState!.triggerCharacter!);
     }
   };
@@ -89,10 +92,10 @@ class SuggestionMenuView<
       `[data-decoration-id="${this.pluginState!.decorationId}"]`
     );
 
-    if (this.editor.isEditable) {
+    if (this.editor.isEditable && decorationNode) {
       this.state = {
         show: true,
-        referencePos: decorationNode!.getBoundingClientRect(),
+        referencePos: decorationNode.getBoundingClientRect(),
         query: this.pluginState!.query,
       };
 

packages/core/src/extensions/TableHandles/TableHandlesPlugin.ts

@@ -159,7 +159,11 @@ export class TableHandlesView<
     const rowIndex = getChildIndex(target.parentElement!);
     const cellRect = target.getBoundingClientRect();
     const tableRect =
-      target.parentElement!.parentElement!.getBoundingClientRect();
+      target.parentElement?.parentElement?.getBoundingClientRect();
+
+    if (!tableRect) {
+      return;
+    }
 
     const blockEl = getDraggableBlockFromElement(target, this.pmView);
     if (!blockEl) {

packages/dev-scripts/package.json

@@ -30,4 +30,4 @@
       "../../.eslintrc.js"
     ]
   }
-}
+}