Function node
In n8n, a node that lets you write custom JavaScript to transform data, perform calculations, or call APIs. Equivalent to Make's "Tools > Execute JavaScript" module. Unlocks logic that visual nodes cannot handle.
Expert insight
Reaching for a function node too early is a common mistake, if a built-in node can do it (a Set node for renaming fields, an IF node for a condition), use that instead. Code inside a function node is invisible to anyone skimming the workflow visually, harder to maintain, and the first place a non-technical team member gets stuck when they need to make a small change later.
How PURIST uses this
This concept is built into every automation we deploy.
When PURIST builds your automation, Function node is not an optional consideration it is part of the production standard. Our workflows are tested against edge cases, monitored 24/7, and built to handle what happens when things don't go as expected.
Every client workflow we deploy in the Core concepts category is designed with this principle in mind from day one not added as an afterthought.
Complexity level
Technical term used in production automation systems.
Related terms
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