Minimum required Node.js version is 20.

Node.js 18 has reached its end of life, and the new jsdom 27.0.0
needs Node.js 20 or later.

Author: striezel

.github/workflows/node.js.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [18.x, 20.x, 22.x, 24.x]
+        node-version: [20.x, 22.x, 24.x]
 
     steps:
     - uses: actions/checkout@v5

.gitlab-ci.yml

@@ -1,14 +1,3 @@
-node_18:
-  image: node:18-alpine
-  stage: build
-  before_script:
-    - node --version
-    - npm --version
-  script:
-    - cd ./export-server
-    - npm install
-    - ./test.sh
-
 node_20:
   image: node:20-alpine
   stage: build

changelog.md

@@ -12,6 +12,11 @@ version change in this application.
 
 ## Version 7.0.0-pre (2025-09-??)
 
+* __[breaking change]__
+__Support for Node.js 19 and older versions is dropped.__ The minimum required
+version is now Node.js 20. Node.js versions before 20 have reached their end of
+life, so users of those versions should upgrade to newer versions anyway.
+
 * __[maintenance]__
 Update dependency `jsdom` to 27.0.0.
 

documentation/installation-node-js.md

@@ -7,28 +7,39 @@ tested. Therefore, using an older version of Node.js may work, but it is not
 recommended.
 
 ## Node.js on Windows
+
 If you are on Windows, just [download](https://nodejs.org/en/download/) the MSI
 installer package and install it.
 
 ## Node.js on Linux
+
 If your Linux distribution does not provide a recent Node.js version (at least
-version 18 is recommended), you can add an (unofficial) Node.js package
+version 20 is recommended), you can add an (unofficial) Node.js package
 repository to your system.
 
 ### Debian-based
 
-On Debian-based systems create the file **/etc/apt/sources.list.d/nodejs.list**
-and give it the following contents:
+On Debian-based systems you need curl and GnuPG for download and preparation of
+the Node.js installation. Both can be installed by typing
+
+    apt-get install curl gnupg2
+
+into a root terminal. Next, download and install the package signing key for the
+Node.js package repository:
+
+    curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg
+
+Then create the file **/etc/apt/sources.list.d/nodejs.list** and give it the
+following contents:
 
-    # Node.js 18.x for Debian 11 (codename bullseye)
-    deb https://deb.nodesource.com/node_18.x bullseye main
-    deb-src https://deb.nodesource.com/node_18.x bullseye main
+    # Node.js 20.x for Debian
+    deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_20.x nodistro main
 
 After that do
 
     apt-get update && apt-get upgrade
 
-to update the APT package lists. To install Node.js 18, type
+to update the APT package lists. To install Node.js 20, type
 
     apt-get install nodejs
 
@@ -38,7 +49,7 @@ That's it.
 
 On a RedHat-based system (e.g. CentOS) make sure curl is installed and then type
 
-    curl -sL https://rpm.nodesource.com/setup_18.x | bash -
+    curl -sL https://rpm.nodesource.com/setup_20.x | bash -
 
 to download and execute a bash script that will take care of the installation.
 You might want to check the script code before doing that, though.

export-server/package-lock.json

@@ -25,6 +25,6 @@
     "jsdom": "^27.0.0"
   },
   "engines": {
-    "node": ">=18"
+    "node": ">=20"
   }
 }

export-server/package.json

@@ -11,7 +11,7 @@ on the Plotly servers.
 
 This application needs one prerequisite:
 
-* Node.js 18 or later (preferably the latest LTS version)
+* Node.js 20 or later (preferably the latest LTS version)
 
 ### Installation of Node.js