diff --git a/package.json b/package.json
index 46faf089..59c10352 100644
--- a/package.json
+++ b/package.json
@@ -34,6 +34,7 @@
     "fake-indexeddb": "^3.1.2",
     "impunity": "^1.0.9",
     "mdn-polyfills": "^5.20.0",
+    "merge-options": "^3.0.4",
     "node-html-parser": "^4.0.0",
     "postcss-css-variables": "^0.18.0",
     "postcss-flexbugs-fixes": "^5.0.2",
diff --git a/vite.common-config.js b/vite.common-config.js
new file mode 100644
index 00000000..b120ee59
--- /dev/null
+++ b/vite.common-config.js
@@ -0,0 +1,50 @@
+const cssvariables = require("postcss-css-variables");
+const flexbugsFixes = require("postcss-flexbugs-fixes");
+const fs = require("fs");
+const path = require("path");
+const version = JSON.parse(fs.readFileSync(path.join(__dirname, "package.json"), "utf8")).version;
+
+const commonOptions = {
+    logLevel: "warn",
+    public: false,
+    server: {
+        hmr: false
+    },
+    resolve: {
+        alias: {
+            // these should only be imported by the base-x package in any runtime code
+            // and works in the browser with a Uint8Array shim,
+            // rather than including a ton of polyfill code
+            "safe-buffer": "./scripts/package-overrides/safe-buffer/index.js",
+            "buffer": "./scripts/package-overrides/buffer/index.js",
+        }
+    },
+    build: {
+        emptyOutDir: true,
+        minify: true,
+        sourcemap: true,
+        assetsInlineLimit: 0,
+        polyfillModulePreload: false,
+    },
+    define: {
+        DEFINE_VERSION: JSON.stringify(version),
+        DEFINE_GLOBAL_HASH: JSON.stringify(null),
+    },
+    css: {
+        postcss: {
+            plugins: [
+                cssvariables({
+                    preserve: (declaration) => {
+                        return declaration.value.indexOf("var(--ios-") == 0;
+                    }
+                }),
+                // the grid option creates some source fragment that causes the vite warning reporter to crash because
+                // it wants to log a warning on a line that does not exist in the source fragment.
+                // autoprefixer({overrideBrowserslist: ["IE 11"], grid: "no-autoplace"}),
+                flexbugsFixes()
+            ]
+        }
+    }
+};
+
+module.exports = commonOptions;
diff --git a/vite.config.js b/vite.config.js
index 1562269e..f3f43be2 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -1,39 +1,16 @@
-const cssvariables = require("postcss-css-variables");
-const flexbugsFixes = require("postcss-flexbugs-fixes");
-
-const fs = require("fs");
-const path = require("path");
-
 const injectWebManifest = require("./scripts/build-plugins/manifest");
 const {injectServiceWorker, createPlaceholderValues} = require("./scripts/build-plugins/service-worker");
 const {defineConfig} = require('vite');
-const version = JSON.parse(fs.readFileSync(path.join(__dirname, "package.json"), "utf8")).version;
+const mergeOptions = require('merge-options').bind({concatArrays: true});
+const commonOptions = require("./vite.common-config.js");
 
 export default defineConfig(({mode}) => {
     const definePlaceholders = createPlaceholderValues(mode);
-    return {
-        public: false,
+    return mergeOptions(commonOptions, {
         root: "src/platform/web",
         base: "./",
-        server: {
-            hmr: false
-        },
-        resolve: {
-            alias: {
-                // these should only be imported by the base-x package in any runtime code
-                // and works in the browser with a Uint8Array shim,
-                // rather than including a ton of polyfill code
-                "safe-buffer": "./scripts/package-overrides/safe-buffer/index.js",
-                "buffer": "./scripts/package-overrides/buffer/index.js",
-            }
-        },
         build: {
             outDir: "../../../target",
-            emptyOutDir: true,
-            minify: true,
-            sourcemap: true,
-            assetsInlineLimit: 0,
-            polyfillModulePreload: false,
         },
         plugins: [
             // important this comes before service worker
@@ -45,28 +22,6 @@ export default defineConfig(({mode}) => {
                 "sw": definePlaceholders
             }),
         ],
-        define: {
-            DEFINE_VERSION: JSON.stringify(version),
-            ...definePlaceholders
-        },
-        css: {
-            postcss: {
-                plugins: [
-                    cssvariables({
-                        preserve: (declaration) => {
-                            return declaration.value.indexOf("var(--ios-") == 0;
-                        }
-                    }),
-                    // the grid option creates some source fragment that causes the vite warning reporter to crash because
-                    // it wants to log a warning on a line that does not exist in the source fragment.
-                    // autoprefixer({overrideBrowserslist: ["IE 11"], grid: "no-autoplace"}),
-                    flexbugsFixes()
-                ]
-            }
-        }
-    };
+        define: definePlaceholders,
+    });
 });
-
-function scriptTagPath(htmlFile, index) {
-    return `${htmlFile}?html-proxy&index=${index}.js`;
-}
diff --git a/yarn.lock b/yarn.lock
index 87d39fac..c564dbe5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -963,6 +963,11 @@ is-number@^7.0.0:
   resolved "https://registry.yarnpkg.com/is-number/-/is-number-7.0.0.tgz#7535345b896734d5f80c4d06c50955527a14f12b"
   integrity sha512-41Cifkg6e8TylSpdtTpeLVMqvSBEVzTttHvERD741+pnZ8ANv0004MRL43QKPDlK9cGvNp6NZWZUBlbGXYxxng==
 
+is-plain-obj@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/is-plain-obj/-/is-plain-obj-2.1.0.tgz#45e42e37fccf1f40da8e5f76ee21515840c09287"
+  integrity sha512-YWnfyRwxL/+SsrWYfOpUtz5b3YD+nyfkHvjbcanzk8zgyO4ASD67uVMRt8k5bM4lLMDnXfriRhOpemw+NfT1eA==
+
 isexe@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/isexe/-/isexe-2.0.0.tgz#e8fbf374dc556ff8947a10dcb0572d633f2cfa10"
@@ -1036,6 +1041,13 @@ mdn-polyfills@^5.20.0:
   resolved "https://registry.yarnpkg.com/mdn-polyfills/-/mdn-polyfills-5.20.0.tgz#ca8247edf20a4f60dec6804372229812b348260b"
   integrity sha512-AbTv1ytcoOUAkxw6u5oo2QPf27kEZgxBAQr49jFb4i2VnTnFGfJbcIQ9UDBOdfNECeXsgkYFwB2BkdeTfOzztw==
 
+merge-options@^3.0.4:
+  version "3.0.4"
+  resolved "https://registry.yarnpkg.com/merge-options/-/merge-options-3.0.4.tgz#84709c2aa2a4b24c1981f66c179fe5565cc6dbb7"
+  integrity sha512-2Sug1+knBjkaMsMgf1ctR1Ujx+Ayku4EdJN4Z+C2+JzoeF7A3OZ9KM2GY0CpQS51NR61LTurMJrRKPhSs3ZRTQ==
+  dependencies:
+    is-plain-obj "^2.1.0"
+
 merge2@^1.3.0:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/merge2/-/merge2-1.4.1.tgz#4368892f885e907455a6fd7dc55c0c9d404990ae"