Most browsers parse and discard a meaningless, trailing comma. Unfortunately, that's not the case for Internet Explorer, which in most versions throws a meaningless error. Therefore trailing commas should be eliminated.

## Noncompliant Code Example

    var settings = {
        'foo'  : oof,
        'bar' : rab,    // Noncompliant - trailing comma
    };

## Compliant Solution

    var settings = {
        'foo'  : oof,
        'bar' : rab
    };