From 112a6df67536e5901206534b2356b8a0dd91bf7e Mon Sep 17 00:00:00 2001
From: Alan Garny <agarny@hellix.com>
Date: Sun, 8 Feb 2026 18:33:36 +1300
Subject: [PATCH 1/3] New version.

---
 package.json              | 2 +-
 src/renderer/package.json | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/package.json b/package.json
index ce4b4b0d..98cc1194 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "url": "git+https://github.com/opencor/webapp.git"
   },
   "type": "module",
-  "version": "0.20260208.0",
+  "version": "0.20260209.0",
   "scripts": {
     "archive:web": "bun src/renderer/scripts/archive.web.js",
     "build": "electron-vite build",
diff --git a/src/renderer/package.json b/src/renderer/package.json
index adaeeb81..d4cb1cea 100644
--- a/src/renderer/package.json
+++ b/src/renderer/package.json
@@ -39,7 +39,7 @@
     },
     "./style.css": "./dist/opencor.css"
   },
-  "version": "0.20260208.0",
+  "version": "0.20260209.0",
   "scripts": {
     "build": "vite build",
     "build:lib": "vite build --config vite.lib.config.ts && cp index.d.ts dist/index.d.ts",

From 7b1036a825becfa5a37942adcb363b52fb631b8b Mon Sep 17 00:00:00 2001
From: Alan Garny <agarny@hellix.com>
Date: Sun, 8 Feb 2026 21:11:30 +1300
Subject: [PATCH 2/3] Some minor cleaning up.

---
 src/renderer/scripts/archive.web.js                 | 2 +-
 src/renderer/src/common/settings.ts                 | 2 +-
 src/renderer/src/components/BackgroundComponent.vue | 3 ++-
 src/renderer/src/components/dialogs/AboutDialog.vue | 4 ++--
 4 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/renderer/scripts/archive.web.js b/src/renderer/scripts/archive.web.js
index 791513e2..75d3ce02 100644
--- a/src/renderer/scripts/archive.web.js
+++ b/src/renderer/scripts/archive.web.js
@@ -5,7 +5,7 @@ if (!fs.existsSync('dist')) {
   fs.mkdirSync('dist');
 }
 
-const version = JSON.parse(fs.readFileSync('package.json', 'utf8')).version;
+const version = JSON.parse(fs.readFileSync('package.json')).version;
 
 tar.c(
   {
diff --git a/src/renderer/src/common/settings.ts b/src/renderer/src/common/settings.ts
index 6160e838..96451d43 100644
--- a/src/renderer/src/common/settings.ts
+++ b/src/renderer/src/common/settings.ts
@@ -11,7 +11,7 @@ class Settings {
     // Start with some default settings and then load them.
     // Note: to have default settings is critical when running the desktop version of OpenCOR since they are loaded
     //       asynchronously, so we need to ensure that our settings are always defined. This is not the case for the
-    //       web version of OpenCOR, where we can load our settings directly from the cookies.
+    //       Web version of OpenCOR, where we can load our settings directly from the cookies.
 
     this.reset();
     this.load();
diff --git a/src/renderer/src/components/BackgroundComponent.vue b/src/renderer/src/components/BackgroundComponent.vue
index f8ed08ff..311c3d61 100644
--- a/src/renderer/src/components/BackgroundComponent.vue
+++ b/src/renderer/src/components/BackgroundComponent.vue
@@ -18,8 +18,9 @@
  *  - Height: 257.92px + 8px = 266.92px.
  */
 
-import { COPYRIGHT } from '../common/constants.ts';
 import { version } from '../../package.json';
+
+import { COPYRIGHT } from '../common/constants.ts';
 </script>
 
 <style scoped>
diff --git a/src/renderer/src/components/dialogs/AboutDialog.vue b/src/renderer/src/components/dialogs/AboutDialog.vue
index ca2d7fcd..7818c790 100644
--- a/src/renderer/src/components/dialogs/AboutDialog.vue
+++ b/src/renderer/src/components/dialogs/AboutDialog.vue
@@ -41,11 +41,11 @@
 </template>
 
 <script setup lang="ts">
+import { version } from '../../../package.json';
+
 import { COPYRIGHT } from '../../common/constants.ts';
 import { electronApi } from '../../common/electronApi.ts';
 import * as locApi from '../../libopencor/locApi.ts';
 
 defineEmits<(event: 'close') => void>();
-
-import { version } from '../../../package.json';
 </script>

From 6eb02e0b7dfd3122f747d85abdeab764700d9e7b Mon Sep 17 00:00:00 2001
From: Alan Garny <agarny@hellix.com>
Date: Mon, 9 Feb 2026 11:18:09 +1300
Subject: [PATCH 3/3] Web: let people know that a newer version of OpenCOR is
 available.

---
 package.json                             |   2 +-
 src/renderer/package.json                |   2 +-
 src/renderer/scripts/generate.version.js |  26 +++++
 src/renderer/src/common/version.ts       | 122 +++++++++++++++++++++++
 src/renderer/src/components/MainMenu.vue |  46 ++++++++-
 src/renderer/src/components/OpenCOR.vue  |   5 +
 6 files changed, 200 insertions(+), 3 deletions(-)
 create mode 100644 src/renderer/scripts/generate.version.js
 create mode 100644 src/renderer/src/common/version.ts

diff --git a/package.json b/package.json
index 98cc1194..114c9c56 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
   "scripts": {
     "archive:web": "bun src/renderer/scripts/archive.web.js",
     "build": "electron-vite build",
-    "build:web": "cd ./src/renderer && vite build",
+    "build:web": "cd ./src/renderer && vite build && bun scripts/generate.version.js",
     "clean": "bun src/renderer/scripts/clean.js",
     "dependencies:update": "bun clean && bun update -i && bun install && bun clean && cd ./src/renderer && bun clean && bun update -i && bun install && bun clean",
     "dev": "electron-vite dev --watch",
diff --git a/src/renderer/package.json b/src/renderer/package.json
index d4cb1cea..17a58a35 100644
--- a/src/renderer/package.json
+++ b/src/renderer/package.json
@@ -41,7 +41,7 @@
   },
   "version": "0.20260209.0",
   "scripts": {
-    "build": "vite build",
+    "build": "vite build && bun scripts/generate.version.js",
     "build:lib": "vite build --config vite.lib.config.ts && cp index.d.ts dist/index.d.ts",
     "clean": "bun scripts/clean.js",
     "dependencies:update": "cd ../.. && bun clean && bun update -i && bun install && bun clean && cd src/renderer && bun clean && bun update -i && bun install && bun clean",
diff --git a/src/renderer/scripts/generate.version.js b/src/renderer/scripts/generate.version.js
new file mode 100644
index 00000000..b9edf6a8
--- /dev/null
+++ b/src/renderer/scripts/generate.version.js
@@ -0,0 +1,26 @@
+import fs from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+// Retrieve the version from the package.json file.
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const packageJsonPath = path.join(__dirname, '../package.json');
+const packageJson = JSON.parse(fs.readFileSync(packageJsonPath));
+const { version } = packageJson;
+
+// Make sure that the dist/assets folder exists.
+
+const distAssetsPath = path.join(__dirname, '../dist/assets');
+
+if (!fs.existsSync(distAssetsPath)) {
+  fs.mkdirSync(distAssetsPath, { recursive: true });
+}
+
+// Write the version file.
+
+fs.writeFileSync(path.join(distAssetsPath, 'version.json'), JSON.stringify({ version }, null, 2));
+
+// Log the generated version.
+
+console.log(`Generated version.json with version ${version}.`);
diff --git a/src/renderer/src/common/version.ts b/src/renderer/src/common/version.ts
new file mode 100644
index 00000000..773b11b8
--- /dev/null
+++ b/src/renderer/src/common/version.ts
@@ -0,0 +1,122 @@
+import * as vue from 'vue';
+
+import packageJson from '../../package.json' with { type: 'json' };
+
+import { electronApi } from './electronApi.ts';
+
+const { version } = packageJson;
+
+// State to track whether an update is available and the latest version.
+
+const updateAvailable = vue.ref(false);
+const latestVersion = vue.ref<string>('');
+
+// Check if a new version is available.
+
+interface IVersionInfo {
+  version: string;
+}
+
+const checkForUpdates = async (): Promise<boolean> => {
+  // Make sure that we are not running the desktop version of OpenCOR.
+
+  if (electronApi) {
+    return false;
+  }
+
+  // Get the latest version information from the server and compare it with the current version.
+
+  try {
+    // Fetch the version.json file from the server with cache busting (i.e. by adding a timestamp query parameter to the
+    // URL so that the browser doesn't serve a cached version).
+
+    const response = await fetch(`./assets/version.json?t=${Date.now()}`);
+
+    if (!response.ok) {
+      console.warn('Failed to fetch the version information.');
+
+      updateAvailable.value = false;
+      latestVersion.value = '';
+
+      return false;
+    }
+
+    const versionInfo: IVersionInfo = await response.json();
+
+    latestVersion.value = versionInfo.version;
+
+    // Compare versions.
+
+    const isNewer = isNewerVersion(latestVersion.value, version);
+
+    updateAvailable.value = isNewer;
+
+    return isNewer;
+  } catch (error) {
+    console.error('Failed to check for updates:', error);
+
+    updateAvailable.value = false;
+    latestVersion.value = '';
+
+    return false;
+  }
+};
+
+// Return whether the first version is newer than the second version.
+
+const isNewerVersion = (versionA: string, versionB: string): boolean => {
+  const partsA = versionA.split('.').map(Number);
+  const partsB = versionB.split('.').map(Number);
+
+  for (let i = 0; i < Math.max(partsA.length, partsB.length); ++i) {
+    const partA = partsA[i] || 0;
+    const partB = partsB[i] || 0;
+
+    if (partA > partB) {
+      return true;
+    }
+
+    if (partA < partB) {
+      return false;
+    }
+  }
+
+  return false;
+};
+
+// Start periodic version checking (every 5 minutes).
+
+let checkInterval: number | null = null;
+
+const startCheck = (): void => {
+  // Make sure that we are not running the desktop version of OpenCOR.
+
+  if (electronApi) {
+    return;
+  }
+
+  // Check immediately on start.
+
+  checkForUpdates();
+
+  // Then check every 5 minutes.
+
+  if (!checkInterval) {
+    checkInterval = window.setInterval(
+      () => {
+        checkForUpdates();
+      },
+      5 * 60 * 1000 // Every 5 minutes.
+    );
+  }
+};
+
+// Reload the Web app to get the latest version (force cache bypass).
+
+const reloadApp = (): void => {
+  window.location.replace(window.location.href);
+};
+
+// Export the version checking functions and state.
+
+export { latestVersion, reloadApp, startCheck, updateAvailable };
diff --git a/src/renderer/src/components/MainMenu.vue b/src/renderer/src/components/MainMenu.vue
index 4a6f83c1..89c03218 100644
--- a/src/renderer/src/components/MainMenu.vue
+++ b/src/renderer/src/components/MainMenu.vue
@@ -1,5 +1,5 @@
 <template>
-  <Menubar ref="menuBar" :model="items">
+  <Menubar ref="menuBar" :id="props.id" :model="items">
     <template #item="{ item, props }">
       <a v-bind="props.action">
         <div class="p-menubar-item-label">{{ item.label }}</div>
@@ -20,7 +20,23 @@
         </div>
       </a>
     </template>
+    <template #end>
+      <button v-if="updateAvailable" class="update-link flex mr-1 text-xs px-1.5 py-0.5 cursor-pointer rounded-sm border border-transparent bg-transparent"
+        type="button" title="Click to reload and update"
+        @click="onUpdateClick"
+      >
+        New version available!
+      </button>
+    </template>
   </Menubar>
+
+  <YesNoQuestionDialog
+    v-model:visible="updateConfirmVisible"
+    title="Update Available..."
+    :question="'Version ' + latestVersion + ' is available. Do you want to reload and update now?'"
+    @yes="onUpdate"
+    @no="updateConfirmVisible = false"
+  />
 </template>
 
 <script setup lang="ts">
@@ -30,8 +46,10 @@ import type Menubar from 'primevue/menubar';
 import * as vue from 'vue';
 
 import * as common from '../common/common.ts';
+import * as version from '../common/version.ts';
 
 const props = defineProps<{
+  id?: string;
   isActive: boolean;
   hasFiles: boolean;
   uiEnabled: boolean;
@@ -46,6 +64,7 @@ const emit = defineEmits<{
   (event: 'openSampleLorenz'): void;
   (event: 'settings'): void;
 }>();
+
 const isWindowsOrLinux = common.isWindows() || common.isLinux();
 const isMacOs = common.isMacOs();
 
@@ -137,6 +156,22 @@ const items = [
   }
 ];
 
+// Handle the click on the update link button by showing a Yes/No dialog.
+
+const updateConfirmVisible = vue.ref(false);
+const updateAvailable = version.updateAvailable;
+const latestVersion = version.latestVersion;
+
+const onUpdateClick = () => {
+  updateConfirmVisible.value = true;
+};
+
+const onUpdate = () => {
+  updateConfirmVisible.value = false;
+
+  version.reloadApp();
+};
+
 // A few things that can only be done when the component is mounted.
 
 const menuBar = vue.ref<(vue.ComponentPublicInstance<typeof Menubar> & { hide: () => void }) | null>(null);
@@ -261,4 +296,13 @@ if (common.isDesktop()) {
   background-color: var(--p-content-hover-background);
   color: var(--p-text-muted-color);
 }
+
+.update-link {
+  color: var(--p-primary-color);
+}
+
+.update-link:hover {
+  background-color: var(--p-content-hover-background);
+  border-color: var(--p-content-border-color);
+}
 </style>
diff --git a/src/renderer/src/components/OpenCOR.vue b/src/renderer/src/components/OpenCOR.vue
index 4a43ea22..54cdc5ac 100644
--- a/src/renderer/src/components/OpenCOR.vue
+++ b/src/renderer/src/components/OpenCOR.vue
@@ -125,6 +125,7 @@ import { electronApi } from '../common/electronApi.ts';
 import firebaseConfig, { missingFirebaseKeys } from '../common/firebaseConfig';
 */
 import * as locCommon from '../common/locCommon.ts';
+import * as version from '../common/version.ts';
 import * as vueCommon from '../common/vueCommon.ts';
 import type IContentsComponent from '../components/ContentsComponent.vue';
 import * as locApi from '../libopencor/locApi.ts';
@@ -262,6 +263,10 @@ if (!window.locApi) {
   vue.watch(locApiInitialised, (newLocApiInitialised: boolean) => {
     if (newLocApiInitialised) {
       loadingOpencorMessageVisible.value = false;
+
+      // We are now officially loaded, so start checking for a newer version of OpenCOR.
+
+      version.startCheck();
     }
   });
 }