Most browsers parse and discard a meaningless, trailing comma. Unfortunately, that’s not the case for Internet Explorer below version 9, which
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
};
