For this function:

// An exceptionally useful comment
function func(param) {
    var text = 'string';
    for (var i = 0; i < param.length; i++) {
        text += i;
    }
    return {
        "text": text,
        "boolean": false
    };
}

The entire function contents is scoped with .token.function.meta.js, meaning if a style exists for this, which it does for several themes, this is what they do:

Microsoft Predawn theme

I believe this is the reason some people have pointed out about broken JavaScript text highlighting. Switching to the Atom JavaScript grammar removed the issue as the entire function block is not scoped as such.

/cc @aeschli