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2026-06-23 13:28:38 +07:00
commit 966ed115b2
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+/**
+ * ScrollIt
+ * ScrollIt.js(scroll•it•dot•js) makes it easy to make long, vertically scrolling pages.
+ *
+ * Latest version: https://github.com/cmpolis/scrollIt.js
+ *
+ * License <https://github.com/cmpolis/scrollIt.js/blob/master/LICENSE.txt>
+ */
+(function($) {
+    'use strict';
+
+    var pluginName = 'ScrollIt',
+        pluginVersion = '1.0.3';
+
+    /*
+     * OPTIONS
+     */
+    var defaults = {
+        upKey: 38,
+        downKey: 40,
+        easing: 'linear',
+        scrollTime: 600,
+        activeClass: 'active',
+        onPageChange: null,
+        topOffset : 0
+    };
+
+    $.scrollIt = function(options) {
+
+        /*
+         * DECLARATIONS
+         */
+        var settings = $.extend(defaults, options),
+            active = 0,
+            lastIndex = $('[data-scroll-index]:last').attr('data-scroll-index');
+
+        /*
+         * METHODS
+         */
+
+        /**
+         * navigate
+         *
+         * sets up navigation animation
+         */
+        var navigate = function(ndx) {
+            if(ndx < 0 || ndx > lastIndex) return;
+
+            var targetTop = $('[data-scroll-index=' + ndx + ']').offset().top + settings.topOffset + 1;
+            $('html,body').animate({
+                scrollTop: targetTop,
+                easing: settings.easing
+            }, settings.scrollTime);
+        };
+
+        /**
+         * doScroll
+         *
+         * runs navigation() when criteria are met
+         */
+        var doScroll = function (e) {
+            var target = $(e.target).closest("[data-scroll-nav]").attr('data-scroll-nav') ||
+            $(e.target).closest("[data-scroll-goto]").attr('data-scroll-goto');
+            navigate(parseInt(target));
+        };
+
+        /**
+         * keyNavigation
+         *
+         * sets up keyboard navigation behavior
+         */
+        var keyNavigation = function (e) {
+            var key = e.which;
+            if($('html,body').is(':animated') && (key == settings.upKey || key == settings.downKey)) {
+                return false;
+            }
+            if(key == settings.upKey && active > 0) {
+                navigate(parseInt(active) - 1);
+                return false;
+            } else if(key == settings.downKey && active < lastIndex) {
+                navigate(parseInt(active) + 1);
+                return false;
+            }
+            return true;
+        };
+
+        /**
+         * updateActive
+         *
+         * sets the currently active item
+         */
+        var updateActive = function(ndx) {
+            if(settings.onPageChange && ndx && (active != ndx)) settings.onPageChange(ndx);
+
+            active = ndx;
+            $('[data-scroll-nav]').removeClass(settings.activeClass);
+            $('[data-scroll-nav=' + ndx + ']').addClass(settings.activeClass);
+        };
+
+        /**
+         * watchActive
+         *
+         * watches currently active item and updates accordingly
+         */
+        var watchActive = function() {
+            var winTop = $(window).scrollTop();
+
+            var visible = $('[data-scroll-index]').filter(function(ndx, div) {
+                return winTop >= $(div).offset().top + settings.topOffset &&
+                winTop < $(div).offset().top + (settings.topOffset) + $(div).outerHeight()
+            });
+            var newActive = visible.first().attr('data-scroll-index');
+            updateActive(newActive);
+        };
+
+        /*
+         * runs methods
+         */
+        $(window).on('scroll',watchActive).scroll();
+
+        $(window).on('keydown', keyNavigation);
+
+        $('body').on('click','[data-scroll-nav], [data-scroll-goto]', function(e){
+            e.preventDefault();
+            doScroll(e);
+        });
+
+    };
+}(jQuery));