diff --git a/ext/wasm/api/EXPORTED_FUNCTIONS.sqlite3-api b/ext/wasm/api/EXPORTED_FUNCTIONS.sqlite3-api
index 93ab8b7950..ad2872d839 100644
--- a/ext/wasm/api/EXPORTED_FUNCTIONS.sqlite3-api
+++ b/ext/wasm/api/EXPORTED_FUNCTIONS.sqlite3-api
@@ -79,6 +79,12 @@ _sqlite3_open_v2
 _sqlite3_overload_function
 _sqlite3_prepare_v2
 _sqlite3_prepare_v3
+_sqlite3_preupdate_blobwrite
+_sqlite3_preupdate_count
+_sqlite3_preupdate_depth
+_sqlite3_preupdate_hook
+_sqlite3_preupdate_new
+_sqlite3_preupdate_old
 _sqlite3_progress_handler
 _sqlite3_randomness
 _sqlite3_realloc
diff --git a/ext/wasm/api/sqlite3-api-glue.js b/ext/wasm/api/sqlite3-api-glue.js
index e8fe5aba6b..8cb5dff8b4 100644
--- a/ext/wasm/api/sqlite3-api-glue.js
+++ b/ext/wasm/api/sqlite3-api-glue.js
@@ -338,6 +338,26 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
     ["sqlite3_malloc64", "*","i64"],
     ["sqlite3_msize", "i64", "*"],
     ["sqlite3_overload_function", "int", ["sqlite3*","string","int"]],
+    ["sqlite3_preupdate_blobwrite", "int", "sqlite3*"],
+    ["sqlite3_preupdate_count", "int", "sqlite3*"],
+    ["sqlite3_preupdate_depth", "int", "sqlite3*"],
+    ["sqlite3_preupdate_hook", "*", [
+      "sqlite3*",
+      new wasm.xWrap.FuncPtrAdapter({
+        name: 'sqlite3_preupdate_hook',
+        signature: "v(ppippjj)",
+        contextKey: (argv)=>argv[0/* sqlite3* */],
+        callProxy: (callback)=>{
+          return (p,db,op,zDb,zTbl,iKey1,iKey2)=>{
+            callback(p, db, op, wasm.cstrToJs(zDb), wasm.cstrToJs(zTbl),
+                     iKey1, iKey2);
+          };
+        }
+      }),
+      "*"
+    ]],
+    ["sqlite3_preupdate_new", "int", ["sqlite3*", "int", "**"]],
+    ["sqlite3_preupdate_old", "int", ["sqlite3*", "int", "**"]],
     ["sqlite3_realloc64", "*","*", "i64"],
     ["sqlite3_result_int64", undefined, "*", "i64"],
     ["sqlite3_result_zeroblob64", "int", "*", "i64"],
@@ -895,7 +915,7 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
      Intended to be called _only_ from sqlite3_close_v2(),
      passed its non-0 db argument.
 
-     This function freees up certain automatically-installed WASM
+     This function frees up certain automatically-installed WASM
      function bindings which were installed on behalf of the given db,
      as those may otherwise leak.
 
@@ -914,7 +934,7 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
   */
   __dbCleanupMap.cleanup = function(pDb){
     pDb = __argPDb(pDb);
-    wasm.xWrap.FuncPtrAdapter.debugFuncInstall = false;
+    //wasm.xWrap.FuncPtrAdapter.debugFuncInstall = false;
     /**
        Installing NULL functions in the C API will remove those
        bindings. The FuncPtrAdapter which sits between us and the C
@@ -922,13 +942,26 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
        wasm.uninstallFunction() any WASM function bindings it has
        installed for pDb.
     */
-    try{capi.sqlite3_busy_handler(pDb, 0, 0)} catch(e){/*ignored*/}
-    try{capi.sqlite3_commit_hook(pDb, 0, 0)} catch(e){/*ignored*/}
-    try{capi.sqlite3_progress_handler(pDb, 0, 0, 0)} catch(e){/*ignored*/}
-    try{capi.sqlite3_rollback_hook(pDb, 0, 0)} catch(e){/*ignored*/}
-    try{capi.sqlite3_set_authorizer(pDb, 0, 0)} catch(e){/*ignored*/}
-    try{capi.sqlite3_trace_v2(pDb, 0, 0, 0, 0)} catch(e){/*ignored*/}
-    try{capi.sqlite3_update_hook(pDb, 0, 0)} catch(e){/*ignored*/}
+    const closeArgs = [pDb];
+    for(const name of [
+      'sqlite3_busy_handler',
+      'sqlite3_commit_hook',
+      'sqlite3_preupdate_hook',
+      'sqlite3_progress_handler',
+      'sqlite3_rollback_hook',
+      'sqlite3_set_authorizer',
+      'sqlite3_trace_v2',
+      'sqlite3_update_hook'
+    ]) {
+      const x = wasm.exports[name];
+      closeArgs.length = x.length/*==argument count*/
+      /* recall that undefined entries translate to 0 when passed to
+         WASM. */;
+      try{ capi[name](...closeArgs) }
+      catch(e){
+        console.warn("close-time call of",name+"(",closeArgs,") threw:",e);
+      }
+    }
     const m = __dbCleanupMap(pDb, 0);
     if(!m) return;
     if(m.collation){
diff --git a/ext/wasm/api/sqlite3-api-prologue.js b/ext/wasm/api/sqlite3-api-prologue.js
index cae268996b..8f4e02a082 100644
--- a/ext/wasm/api/sqlite3-api-prologue.js
+++ b/ext/wasm/api/sqlite3-api-prologue.js
@@ -139,7 +139,7 @@ self.sqlite3ApiBootstrap = function sqlite3ApiBootstrap(
        main thread (aborts via a failed assert() if it's attempted),
        which eliminates any(?) benefit to supporting it. */  false;
 
-  /** 
+  /**
       The main sqlite3 binding API gets installed into this object,
       mimicking the C API as closely as we can. The numerous members
       names with prefixes 'sqlite3_' and 'SQLITE_' behave, insofar as
@@ -1779,6 +1779,36 @@ self.sqlite3ApiBootstrap = function sqlite3ApiBootstrap(
     return (0===v) ? undefined : capi.sqlite3_value_to_js(v, throwIfCannotConvert);
   };
 
+  /**
+     Internal impl of sqlite3_preupdate_new_js() and
+     sqlite3_preupdate_old_js().
+  */
+  const __preupdateNewOld = function(pDb, iCol, impl){
+    impl = capi[impl];
+    if(!this.ptr) this.ptr = wasm.allocPtr();
+    else wasm.pokePtr(this.ptr, 0);
+    const rc = impl(pDb, iCol, this.ptr);
+    return rc
+      ? SQLite3Error.toss(rc,arguments[2]+"() failed with code "+rc)
+      : capi.sqlite3_value_to_js( wasm.peekPtr(this.ptr), true );
+  }.bind(Object.create(null));
+
+  /**
+     A wrapper around sqlite3_preupdate_new() which fetches the
+     sqlite3_value at the given index and returns the result of
+     passing it to sqlite3_value_to_js(). Throws on error.
+  */
+  capi.sqlite3_preupdate_new_js =
+    (pDb, iCol)=>__preupdateNewOld(pDb, iCol, 'sqlite3_preupdate_new');
+
+  /**
+     A wrapper around sqlite3_preupdate_old() which fetches the
+     sqlite3_value at the given index and returns the result of
+     passing it to sqlite3_value_to_js(). Throws on error.
+  */
+  capi.sqlite3_preupdate_old_js =
+    (pDb, iCol)=>__preupdateNewOld(pDb, iCol, 'sqlite3_preupdate_old');
+
   /* The remainder of the API will be set up in later steps. */
   const sqlite3 = {
     WasmAllocError: WasmAllocError,
diff --git a/ext/wasm/tester1.c-pp.js b/ext/wasm/tester1.c-pp.js
index 5603ee93e0..7f5de5166c 100644
--- a/ext/wasm/tester1.c-pp.js
+++ b/ext/wasm/tester1.c-pp.js
@@ -2690,7 +2690,7 @@ self.sqlite3InitModule = sqlite3InitModule;
   ////////////////////////////////////////////////////////////////////////
   T.g('Hook APIs')
     .t({
-      name: "Commit/rollback/update hooks",
+      name: "sqlite3_commit/rollback/update_hook()",
       predicate: ()=>wasm.bigIntEnabled || "Update hook requires int64",
       test: function(sqlite3){
         let countCommit = 0, countRollback = 0;;
@@ -2746,7 +2746,7 @@ self.sqlite3InitModule = sqlite3InitModule;
               case capi.SQLITE_DELETE:
                 countUpdate[op] = (countUpdate[op]||0) + 1;
                 break;
-              default: return;
+              default: toss("Unexpected hook operator:",op);
           }
         }, 3);
         db.transaction((d)=>{
@@ -2770,7 +2770,51 @@ self.sqlite3InitModule = sqlite3InitModule;
         //wasm.xWrap.FuncPtrAdapter.debugFuncInstall = false;
         db.close();
       }
-    });
+    })/* commit/rollback/update hooks */
+    .t({
+      name: "sqlite3_preupdate_hook()",
+      predicate: ()=>wasm.bigIntEnabled || "Pre-update hook requires int64",
+      test: function(sqlite3){
+        const db = new sqlite3.oo1.DB(':memory:', 1 ? 'c' : 'ct');
+        const countHook = Object.create(null);
+        let rc = capi.sqlite3_preupdate_hook(
+          db, function(p, pDb, op, zDb, zTbl, iKey1, iKey2){
+            T.assert(9 === p)
+              .assert(db.pointer === pDb)
+              .assert(1 === capi.sqlite3_preupdate_count(pDb))
+              .assert( 0 > capi.sqlite3_preupdate_blobwrite(pDb) );
+            countHook[op] = (countHook[op]||0) + 1;
+            switch(op){
+                case capi.SQLITE_INSERT:
+                case capi.SQLITE_UPDATE:
+                 T.assert('number' === typeof capi.sqlite3_preupdate_new_js(pDb, 0));
+                  break;
+                case capi.SQLITE_DELETE:
+                 T.assert('number' === typeof capi.sqlite3_preupdate_old_js(pDb, 0));
+                  break;
+                default: toss("Unexpected hook operator:",op);
+            }
+          },
+          9
+        );
+        db.transaction((d)=>{
+          d.exec([
+            "create table t(a);",
+            "insert into t(a) values(1);",
+            "update t set a=2;",
+            "update t set a=3;",
+            "delete from t where a=3"
+          ]);
+        });
+        T.assert(1 === countHook[capi.SQLITE_INSERT])
+          .assert(2 === countHook[capi.SQLITE_UPDATE])
+          .assert(1 === countHook[capi.SQLITE_DELETE]);
+        //wasm.xWrap.FuncPtrAdapter.debugFuncInstall = true;
+        db.close();
+        //wasm.xWrap.FuncPtrAdapter.debugFuncInstall = false;
+      }
+    })/*pre-update hooks*/
+  ;/*end hook API tests*/
 
   ////////////////////////////////////////////////////////////////////////
   T.g('Auto-extension API')
diff --git a/manifest b/manifest
index 19de39464d..ac8d7ad6cd 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Fix\sa\smissing\s0\sat\sthe\send\sof\san\sinteger\sliteral\sin\scheck-in\s[8da0f0c38a458c57]
-D 2022-12-27T14:03:04.522
+C Expose\ssqlite3_preupdate_hook()\sand\sfriends\sto\sthe\sJS\sAPI.
+D 2022-12-27T14:34:32.202
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -494,7 +494,7 @@ F ext/wasm/EXPORTED_FUNCTIONS.fiddle.in 27450c8b8c70875a260aca55435ec927068b34ce
 F ext/wasm/GNUmakefile ffe0e9818a3b6b36c85a1d10dab76b220a8f5cd83439c62e50223a7970b3d68a
 F ext/wasm/README-dist.txt 2d670b426fc7c613b90a7d2f2b05b433088fe65181abead970980f0a4a75ea20
 F ext/wasm/README.md ef39861aa21632fdbca0bdd469f78f0096f6449a720f3f39642594af503030e9
-F ext/wasm/api/EXPORTED_FUNCTIONS.sqlite3-api 445ae63749f47c50c251de53388ca2d1247f06b62f71289d3d2b9c3cee014575
+F ext/wasm/api/EXPORTED_FUNCTIONS.sqlite3-api d6a5078f48a5301ed17b9a30331075d9b2506e1360c1f0dee0c7816c10acd9ab
 F ext/wasm/api/EXPORTED_RUNTIME_METHODS.sqlite3-api 1ec3c73e7d66e95529c3c64ac3de2470b0e9e7fbf7a5b41261c367cf4f1b7287
 F ext/wasm/api/README.md 77a2f1f2fc60a35def7455dffc8d3f2c56385d6ac5c6cecc60fa938252ea2c54
 F ext/wasm/api/extern-post-js.c-pp.js 8923f76c3d2213159e12d641dc750523ead5c848185dc4996fae5cc12397f88d
@@ -503,9 +503,9 @@ F ext/wasm/api/post-js-footer.js cd0a8ec768501d9bd45d325ab0442037fb0e33d1f3b4f08
 F ext/wasm/api/post-js-header.js 47b6b281f39ad59fa6e8b658308cd98ea292c286a68407b35ff3ed9cfd281a62
 F ext/wasm/api/pre-js.c-pp.js b88499dc303c21fc3f55f2c364a0f814f587b60a95784303881169f9e91c1d5f
 F ext/wasm/api/sqlite3-api-cleanup.js 680d5ccfff54459db136a49b2199d9f879c8405d9c99af1dda0cc5e7c29056f4
-F ext/wasm/api/sqlite3-api-glue.js 7d619834cc0d378e9f46afc1eab0587f8f097944936aff5723da7243f36bc787
+F ext/wasm/api/sqlite3-api-glue.js a5f68e5cd6fe91528a10fe925c75c980440e4dcd02ef1db13a5eaa9c840a301b
 F ext/wasm/api/sqlite3-api-oo1.js e9fba119e9b1716b3f731838ed1ab18741401bcf4c51d2a4a6e9d1d23cf9d771
-F ext/wasm/api/sqlite3-api-prologue.js e862e5b79d565bd79c8ff59ebb6618a07ecb1a0262a1560dc6a10aa0f4d6f531
+F ext/wasm/api/sqlite3-api-prologue.js c53a482a38113d965914890cb8ab6f4c901558cc44c2073577e8f7fa2b28f269
 F ext/wasm/api/sqlite3-api-worker1.js c9ef8865f072e61251260b218aa4ed614a21a25e9e3cc6f22acf81794d32fc0b
 F ext/wasm/api/sqlite3-license-version-header.js a661182fc93fc2cf212dfd0b987f8e138a3ac98f850b1112e29b5fbdaecc87c3
 F ext/wasm/api/sqlite3-opfs-async-proxy.js 7795b84b66a7a8dedc791340709b310bb497c3c72a80bef364fa2a58e2ddae3f
@@ -555,7 +555,7 @@ F ext/wasm/test-opfs-vfs.html 1f2d672f3f3fce810dfd48a8d56914aba22e45c6834e262555
 F ext/wasm/test-opfs-vfs.js f09266873e1a34d9bdb6d3981ec8c9e382f31f215c9fd2f9016d2394b8ae9b7b
 F ext/wasm/tester1-worker.html d43f3c131d88f10d00aff3e328fed13c858d674ea2ff1ff90225506137f85aa9
 F ext/wasm/tester1.c-pp.html d34bef3d48e5cbc1c7c06882ad240fec49bf88f5f65696cc2c72c416933aa406
-F ext/wasm/tester1.c-pp.js e5c0d9d9b4e2ce32764dd4c77a13babc3fd6fcb14b6e068deb072da0a3e43ed8
+F ext/wasm/tester1.c-pp.js 7786fa3bdf074be8935e3a77b1ca135fd36ef6f87823c0695deaca585b133d06
 F ext/wasm/tests/opfs/concurrency/index.html 86d8ac435074d1e7007b91105f4897f368c165e8cecb6a9aa3d81f5cf5dcbe70
 F ext/wasm/tests/opfs/concurrency/test.js a98016113eaf71e81ddbf71655aa29b0fed9a8b79a3cdd3620d1658eb1cc9a5d
 F ext/wasm/tests/opfs/concurrency/worker.js 0a8c1a3e6ebb38aabbee24f122693f1fb29d599948915c76906681bb7da1d3d2
@@ -2067,8 +2067,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P ff5a9b054f4d5ad3d33787aee93b4181822c6dfc513626236d9867bb431f64da
-R f92681d8d01e129072904a73edd86d3a
-U drh
-Z 8530f7f2ef51d599626e5ba8501c27e4
+P e3776796f55574f357eb429e20399389092a68e9ca00aa104ed33eb559ae0de5
+R d834976b54fd785cca19e8460af50575
+U stephan
+Z ac4d1df745aa91809b44c04961ee6a48
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index 02edd45e86..f61010edfd 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-e3776796f55574f357eb429e20399389092a68e9ca00aa104ed33eb559ae0de5
\ No newline at end of file
+cc02783a1210a083683320fae1ec1519e45b8e3003a9e32809d808513a2ce06b
\ No newline at end of file