jQuery Cached Ajax Data Service

jquery.cachedDataService.js

window.CachedDataService = {

  inProgress: {
  },
  ajax: function(ajaxOptions) {
    var key = ajaxOptions.url + (JSON.stringify(ajaxOptions.data || ''))
    if (this.inProgress[key]) {
      return this.inProgress[key];
    }
    else {
      this.inProgress[key] = $.ajax(ajaxOptions);
      return this.inProgress[key];
    }
  }
}


/** sample call */

var ajaxOpts = {
  url: '/big_data_fetch'
}
var success = function(data) { 
  // do something with the data
}
var complete = function() {
  // do something after the fetch is finished
}

CachedDataService.ajax().done(success).always(complete)