While I really like the ability to control scope in ES6 and therefore would probably prefer to use let, for most loops, I would be using forEach or one of its brethren methods in any case, so using let instead would not improve legibility.
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Thank you Alex, I was thinking about setTimeout callback! For other functions, is it better to create a separate callback function?
I only added it for the sake of completeness.
While I really like the ability to control scope in ES6 and therefore would probably prefer to use
let, for most loops, I would be usingforEachor one of its brethren methods in any case, so usingletinstead would not improve legibility.