impressjs.mousewheel.js

//Functions

        // `current` API function returns the current step step
        var current = function() { 
            return steps.indexOf(activeStep);
        };

        // `total` API function returns the number of steps present
        var total = function() {
            return steps.length;
        };

// API definition:

        // Store and return API for given impress.js root element
        return ( roots[ "impress-root-" + rootId ] = {
            init: init,
            goto: goto,
            next: next,
            prev: prev,
            current: current,
            total: total
        } );