fix(html): the envelope states the version the library takes

CHANGELOG.md

@@ -16,6 +16,10 @@ The release run heads these entries with the version and opens a fresh
 
 ## Unreleased
 
+- **Fix**: `odr.editing.getOperations()` and `odr.generateDiff()` stated
+  `"version": 1` while `Document::edit` takes 2, so every save the browser
+  produced was refused. A check page now asserts the version.
+
 - A `.pptx` can be edited and saved: every text operation a `.docx` takes, and
   a save that writes the slide parts back into the package. Its
   `FileTypeCapabilities` now states `edit` and `save`.

src/odr/internal/html/frontend/editing.js

@@ -162,9 +162,11 @@
       });
     },
 
-    /// The envelope a host hands to `Document::edit` before saving.
+    /// The envelope a host hands to `Document::edit` before saving. The
+    /// version is what the library takes; a check page asserts it, because
+    /// nothing else here would notice the two drifting apart.
     getOperations: function () {
-      return JSON.stringify({ version: 1, ops: operations() });
+      return JSON.stringify({ version: 2, ops: operations() });
     },
 
     /// False where no editor has an edit to take back.

test/browser/text/tests.html

@@ -451,6 +451,11 @@
       odr.resetSearch();
       check("as does clearing it", ops().length === 1);
 
+      check(
+        "the envelope states the version the library takes",
+        JSON.parse(odr.editing.getOperations()).version === 2
+      );
+
       odr.editing.committed();
       check("committing clears the log", ops().length === 0);
       check("and undo with it", odr.editing.undo() === false);