Preserve QWord subscript superscript in DOCX

src/io/wordOffice.test.ts

@@ -119,6 +119,25 @@ describe("wordOffice helpers", () => {
     ]);
   });
 
+  it("preserves HTML subscript and superscript as inline runs for DOCX", () => {
+    const blocks = htmlToWordBlocks('<p>H<sub>2</sub>O m<sup>2</sup> <span style="vertical-align: super;">x</span></p>');
+
+    expect(blocks).toEqual([
+      {
+        type: "paragraph",
+        text: "H2O m2 x",
+        runs: [
+          { text: "H" },
+          { text: "2", subscript: true },
+          { text: "O m" },
+          { text: "2", superscript: true },
+          { text: " " },
+          { text: "x", superscript: true }
+        ]
+      }
+    ]);
+  });
+
   it("сохраняет выравнивание абзацев и заголовков для DOCX", () => {
     const blocks = htmlToWordBlocks(`
       <h1 align="right">Итоги</h1>
@@ -405,6 +424,27 @@ describe("wordOffice helpers", () => {
     expect(wordInlineRunsToTextRunOptions([{ text: "Deleted", strike: true }])).toEqual([{ text: "Deleted", strike: true }]);
   });
 
+  it("converts subscript and superscript inline runs into docx parameters", () => {
+    expect(
+      wordInlineRunsToTextRunOptions([
+        { text: "2", subscript: true },
+        { text: "2", superscript: true }
+      ])
+    ).toEqual([
+      { text: "2", subScript: true },
+      { text: "2", superScript: true }
+    ]);
+  });
+
+  it("writes subscript and superscript to exported DOCX XML", async () => {
+    const blob = await exportDocxBlob("Indexes.docx", "<p>H<sub>2</sub>O m<sup>2</sup></p>");
+    const zip = await JSZip.loadAsync(await blob.arrayBuffer());
+    const documentXml = await zip.file("word/document.xml")?.async("string");
+
+    expect(documentXml).toMatch(/<w:vertAlign\b[^>]*w:val="subscript"[^>]*\/>/);
+    expect(documentXml).toMatch(/<w:vertAlign\b[^>]*w:val="superscript"[^>]*\/>/);
+  });
+
   it("записывает зачеркнутый текст в XML экспортированного DOCX", async () => {
     const blob = await exportDocxBlob("Зачеркнутый.docx", "<p><s>Удаленный текст</s></p>");
     const zip = await JSZip.loadAsync(await blob.arrayBuffer());