TextDecoder在node-red中不存在

That's correct. The TextDecoder class does not exist in Node-RED by default. Node-RED is a flow-based programming tool that allows users to create interactive workflows for IoT devices, APIs, and online services. It provides a set of built-in nodes and functions for data manipulation and communication. If you need to use the TextDecoder class in Node-RED, you may need to install a custom node or create a function node that includes the necessary code to use the TextDecoder class.