Question

I was wondering if following syntax evaluates as I think it does :

Cluster.prototype.test_json_availability = function() {
    return Modernizr.addTest('test_json', function() {
    return (typeof $.browser.msie !== 'undefined' && $.browser.msie === true && $.browser.version < 7 && typeof window.JSON === 'undefined') ? false : true;
    });
};

Let’s say I do use a MS browser, this means it will return true ? Or am I doing it wrong ?

Answer 1

You should transform the condition by applying De Morgan’s laws:

function test_json() {
    return typeof $.browser.msie === 'undefined'
      || $.browser.msie !== true
      || $.browser.version > 6
      || typeof window.JSON !== 'undefined';
}

This will simplify the condition a lot, and you will be able to find the answer to your question.