Merge pull request #124 from Patternslib/init-api

Using showing without automatic triggering

shower.js

@@ -7,12 +7,11 @@ window.shower = window.shower || (function(window, document, undefined) {
 	var shower = {},
 		url = window.location,
 		body = document.body,
-		slides = document.querySelectorAll('.slide'),
-		progress = document.querySelector('div.progress div'),
+		slides = [],
+		progress = [],
 		slideList = [],
 		timer,
-		isHistoryApiSupported = !!(window.history && history.pushState),
-		l = slides.length, i;
+		isHistoryApiSupported = !!(window.history && history.pushState);
 
 	/**
 	* Get value at named data store for the DOM element.
@@ -25,7 +24,21 @@ window.shower = window.shower || (function(window, document, undefined) {
 		return element.dataset ? element.dataset[name] : element.getAttribute('data-' + name);
 	};
 
-	for (i = 0; i < l; i++) {
+	/**
+	 * Init
+	 * @param {String} slideSelector
+	 * @param {String} progressBarSelector
+	 * @returns {Object} shower
+	 */
+	shower.init = function(slideSelector, progressSelector) {
+		slideSelector = slideSelector || '.slide';
+		progressSelector = progressSelector || 'div.progress div';
+
+		slides = document.querySelectorAll(slideSelector);
+		progress = document.querySelector(progressSelector);
+		slideList = [];
+
+		for (var i = 0; i < slides.length; i++) {
 			// Slide IDs are optional. In case of missing ID we set it to the
 			// slide number
 			if ( ! slides[i].id) {
@@ -38,6 +51,9 @@ window.shower = window.shower || (function(window, document, undefined) {
 				hasTiming: (shower._getData(slides[i], 'timing') && shower._getData(slides[i], 'timing').indexOf(':') !== -1)
 			});
 		}
+		return shower;
+	};
+
 
 	/**
 	* Get slide scale value.
@@ -684,6 +700,8 @@ window.shower = window.shower || (function(window, document, undefined) {
 		}
 	}, false);
 
+	shower.init();
+
 	document.addEventListener('click', function(e) {
 		var slideNumber = shower.getSlideNumber(shower._getSlideIdByEl(e.target));