Upgrade development tooling to Node 24

Author: fmadore

.github/workflows/build.yml

@@ -21,7 +21,7 @@ jobs:
 
       - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
-          node-version: 22
+          node-version: 24.18.1
           cache: npm
 
       - run: npm ci

.github/workflows/live-smoke.yml

@@ -22,7 +22,7 @@ jobs:
 
       - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
-          node-version: 22
+          node-version: 24.18.1
           cache: npm
 
       - run: npm ci

.nvmrc

@@ -0,0 +1 @@
+24.18.1

README.md

@@ -43,7 +43,7 @@ This is a customized Omeka S theme for the [Islam West Africa Collection](https:
 
 - **Omeka S**: 4.2.0 or higher
 - **PHP**: 8.1 or higher
-- **Node.js**: 20.19 or higher (for builds and tests; CI uses Node 22)
+- **Node.js**: 24.15 or higher on an even-numbered release line (for builds and tests; CI uses Node 24.18.1)
 
 ### Optional Modules
 - [Internationalisation](https://github.com/Daniel-KM/Omeka-S-module-Internationalisation) - For language switching functionality
@@ -53,7 +53,7 @@ This is a customized Omeka S theme for the [Islam West Africa Collection](https:
 
 For basic out-of-the-box use of the theme, follow the [Omeka S User Manual instructions for installing themes](https://omeka.org/s/docs/user-manual/sites/site_theme/#installing-themes).
 
-For more advanced use, such as customizing the theme with Sass, install [Node.js](https://nodejs.org/en/) 20.19 or newer. Navigate to the theme directory and run:
+For more advanced use, such as customizing the theme with Sass, install [Node.js](https://nodejs.org/en/) 24.15 or newer on an even-numbered release line. The current `.nvmrc` selects the CI-tested release. Navigate to the theme directory and run:
 
 ```bash
 npm install

package-lock.json

@@ -28,7 +28,7 @@
   "author": "Frédérick Madore",
   "license": "GPL-3.0-or-later",
   "engines": {
-    "node": ">=20.19"
+    "node": "^24.15.0 || >=26.0.0"
   },
   "bugs": {
     "url": "https://github.com/fmadore/IWAC-theme/issues"
@@ -42,7 +42,7 @@
     "gulp": "^5.0.1",
     "gulp-postcss": "^10.0.0",
     "gulp-sass": "^6.0.1",
-    "jsdom": "^29.1.1",
+    "jsdom": "^30.0.1",
     "sass": "^1.102.0",
     "sharp": "^0.35.3"
   },