147 lines
3.7 KiB
JavaScript
147 lines
3.7 KiB
JavaScript
var Tabs = function($) {
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return {
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init: function() {
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this.cacheDom();
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this.setupAria();
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this.appendIndicator();
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this.bindEvents();
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},
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cacheDom: function() {
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this.$el = $('.tabs');
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this.$tabList = this.$el.find('ul');
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this.$tab = this.$tabList.find('li');
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this.$tabFirst = this.$tabList.find('li:first-child a');
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this.$tabLink = this.$tab.find('a');
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this.$tabPanel = this.$el.find('section');
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this.$tabPanelFirstContent = this.$el.find('section > *:first-child');
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this.$tabPanelFirst = this.$el.find('section:first-child');
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this.$tabPanelNotFirst = this.$el.find('section:not(:first-of-type)');
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},
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bindEvents: function() {
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this.$tabLink.on('click', function(){
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this.changeTab();
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this.animateIndicator($(event.currentTarget));
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}.bind(this));
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this.$tabLink.on('keydown', function() {
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this.changeTabKey();
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}.bind(this));
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},
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changeTab: function() {
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var self = $(event.target);
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event.preventDefault();
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this.removeTabFocus();
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this.setSelectedTab(self);
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this.hideAllTabPanels();
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this.setSelectedTabPanel(self);
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},
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animateIndicator: function(elem) {
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var offset = elem.offset().left;
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var width = elem.width();
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var $indicator = this.$tabList.find('.indicator');
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console.log(elem.width());
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$indicator.transition({
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x: offset,
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width: elem.width()
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})
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},
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appendIndicator: function() {
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this.$tabList.append('<div class="indicator"></div>');
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},
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changeTabKey: function() {
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var self = $(event.target),
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$target = this.setKeyboardDirection(self, event.keyCode);
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if ($target.length) {
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this.removeTabFocus(self);
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this.setSelectedTab($target);
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}
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this.hideAllTabPanels();
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this.setSelectedTabPanel($(document.activeElement));
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this.animateIndicator($target);
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},
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hideAllTabPanels: function() {
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this.$tabPanel.attr('aria-hidden', 'true');
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},
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removeTabFocus: function(self) {
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var $this = self || $('[role="tab"]');
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$this.attr({
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'tabindex': '-1',
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'aria-selected': null
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});
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},
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selectFirstTab: function() {
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this.$tabFirst.attr({
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'aria-selected': 'true',
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'tabindex': '0'
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});
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},
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setupAria: function() {
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this.$tabList.attr('role', 'tablist');
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this.$tab.attr('role', 'presentation');
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this.$tabLink.attr({
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'role': 'tab',
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'tabindex': '-1'
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});
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this.$tabLink.each(function() {
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var $this = $(this);
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$this.attr('aria-controls', $this.attr('href').substring(1));
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});
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this.$tabPanel.attr({
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'role': 'tabpanel'
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});
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this.$tabPanelFirstContent.attr({
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'tabindex': '0'
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});
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this.$tabPanelNotFirst.attr({
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'aria-hidden': 'true'
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});
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this.selectFirstTab();
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},
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setKeyboardDirection: function(self, keycode) {
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var $prev = self.parents('li').prev().children('[role="tab"]'),
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$next = self.parents('li').next().children('[role="tab"]');
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switch (keycode) {
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case 37:
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return $prev;
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break;
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case 39:
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return $next;
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break;
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default:
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return false;
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break;
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}
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},
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setSelectedTab: function(self) {
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self.attr({
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'aria-selected': true,
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'tabindex': '0'
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}).focus();
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},
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setSelectedTabPanel: function(self) {
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$('#' + self.attr('href').substring(1)).attr('aria-hidden', null);
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},
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};
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}(jQuery);
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Tabs.init(); |