Ask for the Node-RED version inside a function node

Question

My aim is it to have code in a function node, which asks for the Node-RED runtime version number. Some of the following code within this function node should not be executed dependent on the version number.

This is important for me since I am working on two different versioned systems. My development system is version > 1.0.0 and my productive system is version < 1.0.0.

I found the Node-RED runtime API but I saw that the API is not available for the Node-RED editor.

How can I ask for the runtime version number inside a function node?

Edit 1: I found a possiblity to use environment variables. Is the version of Node-RED part of the environmant variables? Link. I am working with Linux Debian and Windows10.

let foo = env.get("FOO");

Answer 1

In 1.0, the node.done() api was added to the Function node. You could use a test for its existence as a proxy for knowing if you are running in pre-1.0 or not.

if (!!node.done) {
   // pre-1.0
} else {
   // 1.0 or later
}