Pass additional parameter to a JSONP callback

Question

For a project of mine I need to do multiple calls to a (remote) API using JSONP for processing the API response. All calls use the same callback function. All the calls are

Answer 1

This is a year old now, but I think jfriend00 was on the right track, although it's simpler than all that - use a closure still, just, when specifying the callback add the param:

http://url.to.some.service?callback=myFunc('optA')

http://url.to.some.service?callback=myFunc('optB')

Then use a closure to pass it through:

function myFunc (opt) {
    var myOpt = opt; // will be optA or optB

    return function (data) {
        if (opt == 'optA') {
            // do something with the data
        }
        else if (opt == 'optB') {
            // do something else with the data
        }
    }
}