What is Node-RED primarily built on?

Node-RED is primarily built on NodeJS, which is a JavaScript runtime environment that allows for the execution of JavaScript code on the server side. This environment facilitates the development of scalable network applications, making it particularly well-suited for real-time applications like IoT solutions, where Node-RED excels in handling asynchronous events.

The choice of NodeJS for Node-RED allows developers to create flows that easily integrate various hardware devices, APIs, and online services. The event-driven architecture of NodeJS is ideal for IoT applications because it can handle multiple operations concurrently without significant performance degradation, which is critical given the potentially vast number of devices and data streams involved in IoT systems.

In addition, the ecosystem surrounding NodeJS includes a rich collection of libraries and modules that can be leveraged within Node-RED, enabling rapid development and deployment of applications. This support makes it easy for developers to extend functionality and create complex workflows with minimal effort.