diff --git a/ext/wasm/api/sqlite3-api-cleanup.js b/ext/wasm/api/sqlite3-api-cleanup.js
index ce24ad0137..d989faccaf 100644
--- a/ext/wasm/api/sqlite3-api-cleanup.js
+++ b/ext/wasm/api/sqlite3-api-cleanup.js
@@ -11,12 +11,12 @@
   ***********************************************************************
 
   This file is the tail end of the sqlite3-api.js constellation,
-  intended to be appended after all other files so that it can clean
-  up any global systems temporarily used for setting up the API's
-  various subsystems.
+  intended to be appended after all other sqlite3-api-*.js files so
+  that it can finalize any setup and clean up any global symbols
+  temporarily used for setting up the API's various subsystems.
 */
 'use strict';
-(function(){
+if('undefined' !== typeof Module){ // presumably an Emscripten build
   /**
      Replace sqlite3ApiBootstrap() with a variant which plugs in the
      Emscripten-based config for all config options which the client
@@ -24,7 +24,7 @@
   */
   const SAB = self.sqlite3ApiBootstrap;
   self.sqlite3ApiBootstrap = function(apiConfig){
-    apiConfig = apiConfig||{};
+    apiConfig = apiConfig || {};
     const configDefaults = {
       Module: Module /* ==> Emscripten-style Module object. Currently
                         needs to be exposed here for test code. NOT part
@@ -34,18 +34,29 @@
     };
     const config = {};
     Object.keys(configDefaults).forEach(function(k){
-      config[k] = Object.prototype.hasOwnProperty.call(apiConfig, k)
+      config[k] = Object.getOwnPropertyDescriptor(apiConfig, k)
         ? apiConfig[k] : configDefaults[k];
     });
+    // Copy over any properties apiConfig defines but configDefaults does not...
+    Object.keys(apiConfig).forEach(function(k){
+      if(!Object.getOwnPropertyDescriptor(config, k)){
+        config[k] = apiConfig[k];
+      }
+    });
     return SAB(config);
   };
 
   /**
-     For current (2022-08-22) purposes, automatically call sqlite3ApiBootstrap().
-     That decision will be revisited at some point, as we really want client code
-     to be able to call this to configure certain parts.
-   */
-  const sqlite3 = self.sqlite3ApiBootstrap();
+     For current (2022-08-22) purposes, automatically call
+     sqlite3ApiBootstrap().  That decision will be revisited at some
+     point, as we really want client code to be able to call this to
+     configure certain parts. If the global sqliteApiConfig property
+     is available, it is assumed to be a config object for
+     sqlite3ApiBootstrap().
+  */
+  //console.warn("self.sqlite3ApiConfig = ",self.sqlite3ApiConfig);
+  const sqlite3 = self.sqlite3ApiBootstrap(self.sqlite3ApiConfig || Object.create(null));
+  delete self.sqlite3ApiBootstrap;
 
   if(self.location && +self.location.port > 1024){
     console.warn("Installing sqlite3 bits as global S for dev-testing purposes.");
@@ -53,8 +64,7 @@
   }
 
   /* Clean up temporary references to our APIs... */
-  delete self.sqlite3ApiBootstrap;
-  Module.sqlite3 = sqlite3 /* Currently needed by test code */;
   delete sqlite3.capi.util /* arguable, but these are (currently) internal-use APIs */;
   //console.warn("Module.sqlite3 =",Module.sqlite3);
-})();
+  Module.sqlite3 = sqlite3 /* Currently needed by test code and sqlite3-worker1.js */;
+}
diff --git a/ext/wasm/api/sqlite3-api-prologue.js b/ext/wasm/api/sqlite3-api-prologue.js
index 87cc40b410..1a38f0343a 100644
--- a/ext/wasm/api/sqlite3-api-prologue.js
+++ b/ext/wasm/api/sqlite3-api-prologue.js
@@ -134,7 +134,7 @@ self.sqlite3ApiBootstrap = function sqlite3ApiBootstrap(apiConfig){
     return sqlite3ApiBootstrap.sqlite3;
   }
 
-  apiConfig = apiConfig||{};
+  apiConfig = apiConfig || {};
   const config = Object.create(null);
   {
     const configDefaults = {
@@ -147,9 +147,15 @@ self.sqlite3ApiBootstrap = function sqlite3ApiBootstrap(apiConfig){
       persistentDirName: '/persistent'
     };
     Object.keys(configDefaults).forEach(function(k){
-      config[k] = Object.prototype.hasOwnProperty.call(apiConfig, k)
+      config[k] = Object.getOwnPropertyDescriptor(apiConfig, k)
         ? apiConfig[k] : configDefaults[k];
     });
+    // Copy over any properties apiConfig defines but configDefaults does not...
+    Object.keys(apiConfig).forEach(function(k){
+      if(!Object.getOwnPropertyDescriptor(config, k)){
+        config[k] = apiConfig[k];
+      }
+    });
   }
 
   /** Throws a new Error, the message of which is the concatenation
diff --git a/ext/wasm/common/SqliteTestUtil.js b/ext/wasm/common/SqliteTestUtil.js
index c7c99240e6..4b4cefbf0c 100644
--- a/ext/wasm/common/SqliteTestUtil.js
+++ b/ext/wasm/common/SqliteTestUtil.js
@@ -168,6 +168,33 @@
         }
         f.ui.status.classList.add('hidden');
       }
+    },
+    /**
+       Config options used by the Emscripten-dependent initialization
+       which happens via this.initSqlite3(). This object gets
+       (indirectly) passed to sqlite3ApiBootstrap() to configure the
+       sqlite3 API.
+    */
+    sqlite3ApiConfig: {
+      persistentDirName: "/persistent"
+    },
+    /**
+       Intended to be called by apps which need to call the
+       Emscripten-installed sqlite3InitModule() routine. This function
+       temporarily installs this.sqlite3ApiConfig into the self
+       object, calls it sqlite3InitModule(), and removes
+       self.sqlite3ApiConfig after initialization is done. Returns the
+       promise from sqlite3InitModule(), and the next then() handler
+       will get the Emscripten module object as its argument. That
+       module has the sqlite3's main namespace object installed as its
+       `sqlite3` property.
+    */
+    initSqlite3: function(){
+      self.sqlite3ApiConfig = this.sqlite3ApiConfig;
+      return self.sqlite3InitModule(this).then(function(M){
+        delete self.sqlite3ApiConfig;
+        return M;
+      });
     }
   };
 })(self/*window or worker*/);
diff --git a/ext/wasm/demo-oo1.js b/ext/wasm/demo-oo1.js
index 1ea7e05c64..4eff51b8e8 100644
--- a/ext/wasm/demo-oo1.js
+++ b/ext/wasm/demo-oo1.js
@@ -26,8 +26,13 @@
           oo = sqlite3.oo1,
           wasm = capi.wasm;
 
-    const dbDir = 1 ? "" : capi.sqlite3_web_persistent_dir();
-    const db = new oo.DB(dbDir+"/mydb.sqlite3");
+    const dbName = (
+      0 ? "" : capi.sqlite3_web_persistent_dir()
+    )+"/mydb.sqlite3"
+    if(0 && capi.sqlite3_web_persistent_dir()){
+      capi.sqlite3_wasm_vfs_unlink(dbName);
+    }
+    const db = new oo.DB(dbName);
     log("db =",db.filename);
     /**
        Never(!) rely on garbage collection to clean up DBs and
@@ -224,7 +229,7 @@
   }/*demo1()*/;
 
   const runDemos = function(Module){
-    //log("Module",Module);
+    //log("Module.sqlite3",Module);
     const sqlite3 = Module.sqlite3,
           capi = sqlite3.capi;
     log("Loaded module:",capi.sqlite3_libversion(), capi.sqlite3_sourceid());
@@ -237,5 +242,6 @@
     }
   };
 
-  sqlite3InitModule(self.sqlite3TestModule).then(runDemos);
+  //self.sqlite3TestModule.sqlite3ApiConfig.persistentDirName = "/hi";
+  self.sqlite3TestModule.initSqlite3().then(runDemos);
 })();
diff --git a/ext/wasm/testing1.js b/ext/wasm/testing1.js
index 28f2b604b4..4144219527 100644
--- a/ext/wasm/testing1.js
+++ b/ext/wasm/testing1.js
@@ -1068,13 +1068,7 @@
     log('capi.wasm.exports',capi.wasm.exports);
   };
 
-  sqlite3InitModule(self.sqlite3TestModule).then(function(theModule){
-    /** Use a timeout so that we are (hopefully) out from under
-        the module init stack when our setup gets run. Just on
-        principle, not because we _need_ to be. */
-    //console.debug("theModule =",theModule);
-    //setTimeout(()=>runTests(theModule), 0);
-    // ^^^ Chrome warns: "VIOLATION: setTimeout() handler took A WHOLE 50ms!"
+  self.sqlite3TestModule.initSqlite3().then(function(theModule){
     self._MODULE = theModule /* this is only to facilitate testing from the console */
     runTests(theModule);
   });
diff --git a/manifest b/manifest
index bab5e7c63d..b297210960 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Merge\sin\strunk.
-D 2022-08-22T14:03:11.661
+C More\sexperimentation\swith\show\sclient-side\sconfig\sstate\scan\sbe\spassed\son\sto\sinitialize\sthe\sJS-side\ssqlite3\sAPI.
+D 2022-08-22T21:37:17.339
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -481,20 +481,20 @@ F ext/wasm/api/EXPORTED_RUNTIME_METHODS.sqlite3-api 1ec3c73e7d66e95529c3c64ac3de
 F ext/wasm/api/README.md d876597edd2b9542b6ea031adaaff1c042076fde7b670b1dc6d8a87b28a6631b
 F ext/wasm/api/post-js-footer.js b64319261d920211b8700004d08b956a6c285f3b0bba81456260a713ed04900c
 F ext/wasm/api/post-js-header.js 0e853b78db83cb1c06b01663549e0e8b4f377f12f5a2d9a4a06cb776c003880b
-F ext/wasm/api/sqlite3-api-cleanup.js eee5ac931fa0aee2cace52a0dff0cf22ae56a1993a88d911bd0dd384fb380c9a
+F ext/wasm/api/sqlite3-api-cleanup.js acf798ce96285c0d52738466a96c9deb9d66647f711a40caecab90b5ce66ac3c
 F ext/wasm/api/sqlite3-api-glue.js 67ca83974410961953eeaa1dfed3518530d68381729ed1d27f95122f5baeabd3
 F ext/wasm/api/sqlite3-api-oo1.js f6dcaac3270182471f97efcfda25bd4a4ac1777b8ec52ebd1c6846721160e54c
 F ext/wasm/api/sqlite3-api-opfs.js 011799db398157cbd254264b6ebae00d7234b93d0e9e810345f213a5774993c0
-F ext/wasm/api/sqlite3-api-prologue.js 5d1b13b23af48ce952e30a0f2d6dff4bc4b33f2dc36fdcaf69c164fd9a72b60f
+F ext/wasm/api/sqlite3-api-prologue.js 6e0e7787ed955ea2b6158e0bb7608f63b54236847700d183e49e1f10d0525b8f
 F ext/wasm/api/sqlite3-api-worker1.js ceb1fc88d8a3742c069632e88fd05c14d5a79eb86bdb9e12969ec37f64fbf42b
 F ext/wasm/api/sqlite3-wasi.h 25356084cfe0d40458a902afb465df8c21fc4152c1d0a59b563a3fba59a068f9
 F ext/wasm/api/sqlite3-wasm.c 0d81282eaeff2a6e9fc5c28a388c5c5b45cf25a9393992fa511ac009b27df982
-F ext/wasm/common/SqliteTestUtil.js e41a1406f18da9224523fad0c48885caf995b56956a5b9852909c0989e687e90
+F ext/wasm/common/SqliteTestUtil.js 04156a3b714b1b17a7261d21dd51341a8aeb9880a223e1e7519de98c2cceb414
 F ext/wasm/common/emscripten.css 3d253a6fdb8983a2ac983855bfbdd4b6fa1ff267c28d69513dd6ef1f289ada3f
 F ext/wasm/common/testing.css 572cf1ffae0b6eb7ca63684d3392bf350217a07b90e7a896e4fa850700c989b0
 F ext/wasm/common/whwasmutil.js 41b8e097e0a9cb07c24c0ede3c81b72470a63f4a4efb07f75586dc131569f5ae
 F ext/wasm/demo-oo1.html 75646855b38405d82781246fd08c852a2b3bee05dd9f0fe10ab655a8cffb79aa
-F ext/wasm/demo-oo1.js 8be9c6be3c8e579eab4e7a5ee720ed122e38275a1f105169c6826193e42cf102
+F ext/wasm/demo-oo1.js 04e947b64a36ed8d6fe6d5e3ccee16ffc8b4461dd186e84f4baf44d53cc3aa72
 F ext/wasm/fiddle/emscripten.css 3d253a6fdb8983a2ac983855bfbdd4b6fa1ff267c28d69513dd6ef1f289ada3f
 F ext/wasm/fiddle/fiddle-worker.js bccf46045be8824752876f3eec01c223be0616ccac184bffd0024cfe7a3262b8
 F ext/wasm/fiddle/fiddle.html 550c5aafce40bd218de9bf26192749f69f9b10bc379423ecd2e162bcef885c08
@@ -510,7 +510,7 @@ F ext/wasm/scratchpad-opfs-worker.js 3ec2868c669713145c76eb5877c64a1b20741f74181
 F ext/wasm/scratchpad-opfs-worker2.js 5f2237427ac537b8580b1c659ff14ad2621d1694043eaaf41ae18dbfef2e48c0
 F ext/wasm/sqlite3-worker1.js e93fe8e5da7cb56dcf4d1bb0aa44bf681b509e1c56f2a75885c0f408f034c42b
 F ext/wasm/testing1.html 528001c7e32ee567abc195aa071fd9820cc3c8ffc9c8a39a75e680db05f0c409
-F ext/wasm/testing1.js 9a97a7e45ce122b479b4a706ae1024abded67fd5f34a5764e41ff5efde8dfa17
+F ext/wasm/testing1.js 2def7a86c52ff28b145cb86188d5c7a49d5993f9b78c50d140e1c31551220955
 F ext/wasm/testing2.html a66951c38137ff1d687df79466351f3c734fa9c6d9cce71d3cf97c291b2167e3
 F ext/wasm/testing2.js e16ae385cd24c4a4ec5de6f1c02e621d243e1f179204ac8df31068faa9e31b1a
 F install-sh 9d4de14ab9fb0facae2f48780b874848cbf2f895 x
@@ -2006,8 +2006,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 9dbe9a6aecec43b51057375ef1d2d632db0d17eac8b7552c20cc91fc2f1a55d1 e5eaa80e81fdf86f2875a912b880272b8d099b82b08e945a7988c5dd0fe9d6b5
-R 98198d4c07340458e933c1601dce5a74
+P e215d55a97e1ccbca3101621374444d2381d87ef8e8fde5271e31c8b714e43e9
+R 46e3280ce6b3dabfd5a5df8623d5cf20
 U stephan
-Z cff3826d5874cd44103730340fc5de2d
+Z e9aff16acc00367edea41a90ce619433
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index 31636b0764..bb6efe14bd 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-e215d55a97e1ccbca3101621374444d2381d87ef8e8fde5271e31c8b714e43e9
\ No newline at end of file
+ea2acc454c012a62556f6d0623d6eff60736d24aa214a64462b423623ef44d47
\ No newline at end of file