How to concatenate strings?

Community Usage questions
1

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And how to use javascript function as toUpperCase() etc.

var upper = text.toUpperCase();
2

First case: you’re not writing javascript here, no need for quotes or plus sign.
Second case: you need to have a return statement or to use the #{} syntax that does it for you.

Note: please include the property names in your screenshots, it’s not always obvious which property you’re editing.

3

nickel !

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#{@{text_1}.toUpperCase() }

it is written in the changelog…

reuse #{} syntax as as shorthand for JS{{}} (one liner, implicit return)

but now i understand what this means.