Add 'const' and 'let' to _complexIdentifiers array

[gvangass]

The following code generates a
Uncaught SyntaxError: Invalid or unexpected token

   
    let listGridObj = isc.DesignListGridMenuItem.getListGrid(target, this)
    listGridObj.setShowFilterEditor(!listGridObj.showFilterEditor)

That is because it's seen as an isSimpleExpression == true in method _expressionToFunction.

To combat that, I can add a semicolon after each line, but my linter shows it as warning/error (extra semicolon)

An other solution would be if you add 'const' and 'let' to _complexIdentifiers array

isc.Func.addClassMethods({
...
    _complexIdentifiers : ["switch", "while", "if", "return", "for", "var"],
..

[Isomorphic]

We've updated the reserved words there for SC 12.1. Check the nightly builds dated 2019-10-16 and beyond.