Downloading a file from dashboard only work if I have the Node-RED editor open in my browser too?

because that download node is specifically for downloading from the node-red editor. Its JS code runs inside the Node-RED editor so when its closed, it doesnt work.

to download a file from dashboard, you need to set up a link that points to a served file.

So either put the CSV in a served location or serve it using http-in ~ load file ~ http-response

Here is a post that will get you partially there with the UI side: Downloading Files with ui-template - #6 by Steve-Mcl

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