I got these lines in a function to check for the presence of a sensor: var t = new Date(msg.payload.attr.lastseen); var t0 = new Date(); nmsg.payload.diff = (t0 - t) / 1000; So .diff is the time difference in seconds. In Javascript you should be able to do some arithmetic operations with Date obje…

Thanks, that thread was helpful. Simple double brackets did not help but a construction like var t = Date.parse(msg.payload.lastupdated); var t0 = Number(new Date()); did the job :wink: I hope this bug in the Monaco editor is corrected sometime..

UnborN 9 December 2021 09:16 2

Hello Haegar,

read this thread that i think is related

Topic		Replies	Views
Monaco editor does not allow subraction of dates General	7	436	1 January 2022
Why does monaco complain about arithmetics with Date.getTime? General monaco	6	338	9 April 2022
Arithmetic operation must be of type 'any', 'number', 'bigint' or an enum type General	5	247	27 June 2023
Arithmetic operation [2362] error on one node-red but not other Developing Nodes function-node	6	158	24 April 2024
Why does "new Date()" show as an error? General	11	151	6 July 2024

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NR complains about incorrect javascript code - but its not

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