Web Reference: The Debug sidebar displays messages passed to Debug nodes within the flow, as well as certain log messages from the runtime. For more information on how to use the Debug sidebar to understand the structure of messages, read the Working with messages guide. Aug 5, 2024 · The Debug node helps you understand the messages and data traveling through your flows. It's essential during development for monitoring data transformations, verifying logic, and troubleshooting issues. Jan 16, 2026 · Sending messages to the Node-RED Debug tab without a Debug node is possible by leveraging the RED.comms.publish API. Custom nodes can directly interface with the runtime-editor communication system, enabling cleaner debugging workflows and more control over message visibility.
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