Note: the following will still work but has been replaced by the external module setting in the settings.js file which lets you import modules using the setup tab in the function node. Using Additional Node Modules in The Function Node See this video on creating and using subflows. Using a sub flow makes them available as nodes which you can select from the node palette on the left. You can also use a sub flow to store your functions. See this tutorial on storing flows and functions for more details. You can save your function nodes in the library and reuse them in other flows by importing them To save a function to the library double click on the function to edit it and click on the bookmark icon next to the function name.Ī drop down menu appears to either import or save the function to the library.

Inside a function you can create a new msg object using: var newMsg = ) Now the msg object has a property called msg.newproperty.

Likewise the message topic can be accessed using: var topic= msg.topic Īnd can be modified using: msg.topic= topic

The message payload can be accessed using: var payload= msg.payload Īnd can be modified using: msg.payload=payload This message object must have a payload property ( msg.payload), and usually has other properties depending on the proceeding nodes.Īccessing the msg Properties in The Function Node. The function node accepts a msg object as input and can return 0 or more message objects as output. The function node is used to run JavaScript code against the msg object.

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