Javascript: outside variable used inside closure -

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i have simple jquery popup plugin. usage looks this:

$("#popupcontainer").popup({     onopen: function () { },     onclose: function () { } }); $("#popupcontainer").popup("open", "/home/popupcontent"); $("#popupcontainer").popup("close");

this works good.

however, want pass different onopen callback different url's have. thought making wrapper on plugin, this:

var popupplugin = {}; (function () {     var onopen = null;     var onclose = null;      $("#popupcontainer").popup({         onopen: function () {             if (onopen) {                 onopen();             }             onopen = null;         },         onclose: function () {             if (onclose) {                 onclose();             }             onclose = null;         }     });      popupplugin.open = function (url, callback) {         onopen = callback;         $("#popupcontainer").popup("open", url);     }     popupplugin.close = function (callback) {         onclose = callback;         $("#popupcontainer").popup("close");     } }());  // usage popupplugin.open("/home/popupcontent", function () {     // specific callback });

this works expected (i have different callbacks), worried creating memory leaks somehow.

is implementation of popupplugin wrapper good?


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