Respect DOCX underline none on import

src/io/wordOffice.ts

@@ -1493,7 +1493,7 @@ function docxRunToHtml(run: unknown, imageDataByRelationshipId: DocxImageDataByR
     if (hasDocxBoolean(properties, "w:i")) {
       html = `<em>${html}</em>`;
     }
-    if (hasDocxBoolean(properties, "w:u")) {
+    if (hasDocxUnderline(properties)) {
       html = `<u>${html}</u>`;
     }
     if (hasStrike) {
@@ -1707,6 +1707,15 @@ function hasDocxBoolean(properties: XmlRecord, key: string) {
   return !["0", "false", "off"].includes(value.toLowerCase());
 }
 
+function hasDocxUnderline(properties: XmlRecord) {
+  if (!Object.prototype.hasOwnProperty.call(properties, "w:u")) {
+    return false;
+  }
+
+  const value = (docxAttribute(childRecord(properties, "w:u"), "w:val") || docxAttribute(childRecord(properties, "w:u"), "val")).trim().toLowerCase();
+  return !["0", "false", "off", "none"].includes(value);
+}
+
 function childRecord(value: unknown, key: string): XmlRecord {
   const child = asRecord(value)[key];
   if (Array.isArray(child)) {

src/io/wordOfficeImport.test.ts

@@ -1,4 +1,5 @@
 import { describe, expect, it } from "vitest";
+import JSZip from "jszip";
 import { exportDocxBlob, htmlToWordBlocks, importDocxFile } from "./wordOffice";
 
 const tinyPngBase64 = "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8/x8AAwMCAO+/p9sAAAAASUVORK5CYII=";
@@ -128,6 +129,36 @@ describe("wordOffice DOCX import", () => {
     ]);
   });
 
+  it("does not import DOCX underline when w:u val is none", async () => {
+    const sourceBlob = await exportDocxBlob("UnderlineNone.docx", '<p><span style="color: #0f5fae;">Not underlined</span></p>');
+    const zip = await JSZip.loadAsync(await sourceBlob.arrayBuffer());
+    const documentXml = (await zip.file("word/document.xml")?.async("string")) ?? "";
+    const patchedDocumentXml = documentXml.replace(/(<w:rPr\b[^>]*>[\s\S]*?)(<\/w:rPr>)/, '$1<w:u w:val="none"/>$2');
+    expect(patchedDocumentXml).toContain('<w:u w:val="none"/>');
+    zip.file("word/document.xml", patchedDocumentXml);
+    const patchedBlob = await zip.generateAsync({
+      type: "blob",
+      mimeType: "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
+    });
+
+    const imported = await importDocxFile(
+      new File([patchedBlob], "UnderlineNone.docx", {
+        type: "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
+      })
+    );
+
+    expect(imported.html).not.toContain("<u>Not underlined</u>");
+    expect(imported.html).not.toContain("<u>");
+    expect(imported.html).toContain("color: #0F5FAE;");
+    expect(htmlToWordBlocks(imported.html)).toEqual([
+      {
+        type: "paragraph",
+        text: "Not underlined",
+        runs: [{ text: "Not underlined", color: "0F5FAE" }]
+      }
+    ]);
+  });
+
   it("imports DOCX subscript and superscript from OOXML", async () => {
     const blob = await exportDocxBlob("Indexes.docx", "<p>H<sub>2</sub>O m<sup>2</sup></p>");
     const file = new File([blob], "Indexes.docx", {