:art: https://github.com/siyuan-note/siyuan/issues/9908

app/src/protyle/wysiwyg/transaction.ts

@@ -890,6 +890,7 @@ export const turnsIntoTransaction = (options: {
     let html = "";
     const doOperations: IOperation[] = [];
     const undoOperations: IOperation[] = [];
+    const tempElement = document.createElement("div");
     selectsElement.forEach((item, index) => {
         if ((options.type === "Blocks2Ps" || options.type === "Blocks2Hs") &&
             item.getAttribute("data-type") === "NodeHeading" && item.getAttribute("fold") === "1") {
@@ -903,7 +904,9 @@ export const turnsIntoTransaction = (options: {
         undoOperations.push({
             action: "update",
             id,
-            data: item.outerHTML
+            data: item.outerHTML,
+            parentID: item.parentElement?.getAttribute("data-node-id") || options.protyle.block.parentID || options.protyle.block.rootID,
+            previousID: undoOperations[undoOperations.length - 1]?.id || item.previousElementSibling?.getAttribute("data-node-id")
         });
 
         if (!options.isContinue) {
@@ -911,7 +914,6 @@ export const turnsIntoTransaction = (options: {
             item.outerHTML = options.protyle.lute[options.type](item.outerHTML, options.level);
         } else {
             if (index === selectsElement.length - 1) {
-                const tempElement = document.createElement("div");
                 // @ts-ignore
                 tempElement.innerHTML = options.protyle.lute[options.type](html, options.level);
                 item.outerHTML = tempElement.innerHTML;
@@ -922,12 +924,43 @@ export const turnsIntoTransaction = (options: {
     });
     undoOperations.forEach(item => {
         const nodeElement = options.protyle.wysiwyg.element.querySelector(`[data-node-id="${item.id}"]`);
-        doOperations.push({
-            action: "update",
-            id: item.id,
-            data: nodeElement.outerHTML
-        });
+        if (!nodeElement) {
+            item.action = "insert";
+            doOperations.push({
+                action: "delete",
+                id: item.id,
+            });
+        } else {
+            doOperations.push({
+                action: "update",
+                id: item.id,
+                data: nodeElement.outerHTML
+            });
+        }
     });
+    Array.from(tempElement.children).forEach(item => {
+        const itemId = item.getAttribute("data-node-id");
+        let find = false;
+        undoOperations.find(undoItem => {
+            if (itemId === undoItem.id) {
+                find = true
+                return true;
+            }
+        })
+        if (!find) {
+            doOperations.push({
+                action: "insert",
+                id: itemId,
+                previousID: item.previousElementSibling?.getAttribute("data-node-id") || undoOperations[0].previousID,
+                data: item.outerHTML,
+                parentID: item.parentElement?.getAttribute("data-node-id") || options.protyle.block.parentID || options.protyle.block.rootID,
+            });
+            undoOperations.splice(0, 0, {
+                action: "delete",
+                id: itemId,
+            })
+        }
+    })
     transaction(options.protyle, doOperations, undoOperations);
     processRender(options.protyle.wysiwyg.element);
     highlightRender(options.protyle.wysiwyg.element);