getjsonexample.js

;(function ( $, window, document, undefined ) {
    //url to settings json file
    var settingsJSON = '',
        settings = {};
        
    $(document).on('click', '.selector', function(event) {
        event.preventDefault();
        /* Act on the event */
        
        $.getJSON( settingsJSON, function( data ) {
            settings = data;
        } )
        .success( function() {
            console.debug( 'Settings loaded!' );
            // Do stuff with settings
        })
        .fail( function() {
            console.warn( 'Failed to load settings.' );
        } );
    });
    
  
})( jQuery, window, document );