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Is it safe to use const and let in Node-RED

When I am reading official docs, reading/watching recent unofficial guides, etc. I see var used all over the place inside of function nodes, I very rarely see the use of const and let.

It could be due to Node-RED launching prior to ES6, however, in the chance that there could there be an underlying scoping issue that is solved by using var, I need to ask.

Is it safe to use the newer const and let variable declarations in Node-RED?

Solution

  • Use the modern const and let.

    The reason really is that it predates ES6. As to why the community keep making guides with the old var declaration, it is a mystery.

    here is a discussion on Node-RED's board with a similar topic that urges the use of const and let. https://discourse.nodered.org/t/where-to-use-let-and-where-to-use-var-in-a-function-node/33174