fix: Incorrect translation of != null

shared/editor/lib/prosemirror-recreate-transform/recreateTransform.ts

@@ -91,7 +91,7 @@ export class RecreateTransform {
       // collect operations until we receive a valid document:
       // apply ops-patches until a valid prosemirror document is retrieved,
       // then try to create a transformation step or retry with next operation
-      while (toDoc === null) {
+      while (!toDoc) {
         applyPatch(afterStepJSON, [op]);
 
         try {
@@ -125,7 +125,7 @@ export class RecreateTransform {
         // Text is being replaced, we apply text diffing to find the smallest possible diffs.
         this.addReplaceTextSteps(op, afterStepJSON);
         ops = [];
-      } else if (toDoc && this.addReplaceStep(toDoc, afterStepJSON)) {
+      } else if (this.addReplaceStep(toDoc, afterStepJSON)) {
         // operations have been applied
         ops = [];
       }
@@ -144,7 +144,7 @@ export class RecreateTransform {
     const fromNode = fromDoc.nodeAt(start) as Node;
     const toNode = toDoc.nodeAt(start) as Node;
 
-    if (start !== null) {
+    if (!start) {
       // @note this completly updates all attributes in one step, by completely replacing node
       const nodeType = fromNode.type === toNode.type ? null : toNode.type;
       try {

shared/editor/lib/uploadPlaceholder.tsx

@@ -3,7 +3,7 @@ import { Decoration, DecorationSet } from "prosemirror-view";
 import * as React from "react";
 import ReactDOM from "react-dom";
 import FileExtension from "../components/FileExtension";
-import { recreateTransform } from "../lib/prosemirror-recreate-transform";
+import { recreateTransform } from "./prosemirror-recreate-transform";
 
 // based on the example at: https://prosemirror.net/examples/upload/
 const uploadPlaceholder = new Plugin({