Node versioning

n8n supports node versioning. You can make changes to existing nodes without breaking the existing behavior by introducing a new version.

Be aware of how n8n decides which node version to load:

• If a user builds and saves a workflow using version 1, n8n continues to use version 1 in that workflow, even if you create and publish a version 2 of the node.
• When a user creates a new workflow and browses for nodes, n8n always loads the latest version of the node.

Light versioning

This is available for all node types.

One node can contain more than one version, allowing small version increments without code duplication. To use this feature:

1. Change the main version parameter to an array, and add your version numbers, including your existing version.
2. You can then access the version parameter with @version in your displayOptions in any object (to control which versions n8n displays the object with). You can also query the version from a function using const nodeVersion = this.getNode().typeVersion;.

As an example, say you want to add versioning to the NasaPics node from the Declarative node tutorial, then configure a resource so that n8n only displays it in version 2 of the node. In your base NasaPics.node.ts file:

{
    displayName: 'NASA Pics',
    name: 'NasaPics',
    icon: 'file:nasapics.svg',
    // List the available versions
    version: [1,2,3],
    // More basic parameters here
    properties: [
        // Add a resource that's only displayed for version2
        {
            displayName: 'Resource name',
            // More resource parameters
            displayOptions: {
                show: {
                    '@version': 2,
                },
            },
        },
    ],
}

Full versioning

This isn't available for declarative-style nodes.

As an example, refer to the Mattermost node.

Full versioning summary:

• The base node file should extend NodeVersionedType instead of INodeType.
• The base node file should contain a description including the defaultVersion (usually the latest), other basic node metadata such as name, and a list of versions. It shouldn't contain any node functionality.
• n8n recommends using v1, v2, and so on, for version folder names.