展开折叠功能打破jQuery

Question

In my project I'm using Vertical-Accordion-Menu-Plugin-For-jQuery-Nav-Accordion that allows me to make parent links clickable. I have made some minor changes to jQuery to make it keyboard accessible. Everything looks good besides one little thing. When I expand all levels and then close parent's container, sub-level items are not longer showing expand/collapse button. For some reasons it breaks. https://jsfiddle.net/webIra7/mvtf6zve/

 /* Nav Accordion Plugin v1.1.2 ************************************/ (function($){ $.fn.navAccordion = function(options, callback){ this.each(function(){ //Options var settings = $.extend({ expandButtonText : "+", //Text inside of expand button collapseButtonText: "-", //Text inside of collapse button selectedExpand: "true", //Expand the selected channel selectedClass: "selected", //Class that will be used to detect the currently selected channel - this will check the "parentElement" for this class (the parent <li> by default) multipleLevels: "true", //Apply accordion to all levels - setting this to false will apply the accordion only to the first level buttonWidth: "20%", //Width of accordion expand/collapse button as a percentage or pixels buttonPosition: "right", //Position of button - 'right' is default - you can also choose 'left' slideSpeed: "fast", //Speed of slide animation - "fast", "slow", or number in milliseconds such as 500 parentElement: "li", //Parent element type, class or ID - you don't need to change this if you're using a ul > li > ul pattern childElement: "ul", //Child element type, class or ID - you don't need to change this if you're using a ul > li > ul pattern headersOnly: false, //False is default - setting to true will make any link with sub-nav behave as if it were set to header only, making the link inaccessible - this option is useful if you are using the plugin for a non-navigation area headersOnlyCheck: false, // False is default - set to true to apply the accordion only to links that are set as "header only" (have no href) delayLink: false, //Delay following the href of links until after the accordion the has expanded delayAmount: null //Time in milliseconds to delay before following href - will use "slideSpeed" by default if nothing else is set }, options); var container = this, //Multiple levels variable multi = settings.multipleLevels ? '': ' > ' + settings.childElement + ' > '; //Add class to container $(container) .addClass('accordion-nav'); //Apply has-subnav class to lis with uls - also add accordion buttons with styles $(multi + settings.parentElement, container).each(function(){ if ( ($(this).contents(settings.childElement).length > 0 && settings.headersOnlyCheck == false) || (!($('> a', this).attr('href')) && settings.headersOnlyCheck == true) ) { //Apply Class and styles to parent item $(this).addClass('has-subnav') .css('position', 'relative') .find('>a') .css('margin-' + settings.buttonPosition, settings.buttonWidth); //Add expand button elements $(' > ' + settings.childElement, this) .before('<span class="accordion-btn-wrap"><a href="#"><span class="accordion-btn accordion-collapsed">' + settings.expandButtonText + '</span><a href="#"><span class="accordion-btn accordion-expanded">' + settings.collapseButtonText + '</span></a></span></a>'); //Apply Styles to expand button $('.accordion-btn-wrap', this) .css({ 'width': settings.buttonWidth, 'position': 'absolute', 'top': 0, 'text-align': 'center', 'cursor': 'pointer', 'display': 'inline-block' }) .css(settings.buttonPosition, 0); $('.accordion-btn ', this) .css({ 'display': 'inline-block', 'width': '100%' }); $('.accordion-expanded', this) .css('display', 'none'); } //Apply styles to <a> tags that are set to header only if (!($('> a', this).attr('href')) || settings.headersOnly){ $(this) .addClass('accordion-header-only') .find('.accordion-btn-wrap') .css({ 'width': '100%', 'text-align': settings.buttonPosition }) .find('.accordion-btn ') .css({ 'width': settings.buttonWidth, 'text-align': 'center' }); } //Delay Link Mode if (settings.delayLink && !settings.headersOnly) { var currentThis = this, speed = settings.delayAmount != null ? settings.delayAmount : settings.slideSpeed; if (speed == "fast") { speed = 200; } else if (speed == "slow") { speed = 600; } $('> a', currentThis).on('click',function(e){ if (!$('> .accordion-btn-wrap', currentThis).hasClass("accordion-active")) { e.preventDefault(); var href = $(this).attr('href'); clickToggle($('> .accordion-btn-wrap', currentThis)); //Go to link after delay setTimeout(function(){ window.location = href; }, speed) } }) } }); var selectedNavAccordion = $(settings.parentElement + '.' + settings.selectedClass + ' > .accordion-btn-wrap', container); //Debounced Button height event listener var buttonheightResize = debounce(function(){ //Run button height buttonheight(); //Expand Selected Channel expandSelected(); }, 250); $(window).on('resize', buttonheightResize); //Set button heights buttonheight(); //Expand Selected Channel expandSelected(); //On click function $(container).on('click', '.accordion-btn-wrap', function(e) { e.preventDefault(); clickToggle(this); }); //Callback if (typeof callback == "function") { callback(); } /* Functions *******************************/ //Click Toggle function function clickToggle(element) { var nextChild = $(element).next(settings.childElement), currentExpandBtn = $('.accordion-expanded', element), currentCollapseBtn = $('.accordion-collapsed', element), parentObj = $(element).closest(settings.parentElement); if (nextChild.is(':visible')) { nextChild .slideUp(settings.slideSpeed); $(element) .removeClass('accordion-active'); currentExpandBtn .css('display', 'none'); currentCollapseBtn .css('display', 'inline-block'); parentObj.add(parentObj.siblings('.active')).add(parentObj.find('.active')).removeClass('active'); } else { $(element).closest(settings.childElement).find('.accordion-active') .removeClass('accordion-active') .next(settings.childElement) .slideUp(settings.slideSpeed).prev() .find('.accordion-expanded') .css('display', 'none') .parent().find('.accordion-collapsed') .css('display', 'inline-block'); parentObj.add(parentObj.siblings('.active')).add(parentObj.find('.active')).removeClass('active'); $(element) .addClass('accordion-active'); nextChild .slideToggle(settings.slideSpeed); currentExpandBtn .css('display', 'inline-block'); currentCollapseBtn .css('display', 'none'); parentObj.addClass('active'); } } //Expand Selected Channel Function function expandSelected(){ if(settings.selectedExpand){ if(!settings.headersOnlyCheck){ selectedNavAccordion.find('.accordion-expanded') .css('display', 'inline-block'); selectedNavAccordion.find('.accordion-collapsed') .css('display', 'none'); selectedNavAccordion.addClass('accordion-active') .next(settings.childElement) .css('display', 'block'); selectedNavAccordion.closest(settings.parentElement) .addClass('active'); } else { $(settings.parentElement + '.' + settings.selectedClass + ' > ' + settings.childElement, container) .css('display', 'block'); $(settings.parentElement + '.' + settings.selectedClass).addClass('active'); } } } //Accordion Button Height Function function buttonheight(){ $('.accordion-btn', container).each(function(){ //Show uls so heights are calculated correctly $(settings.parentElement + '.has-subnav > ' + settings.childElement, container) .css('display', 'block'); //Calculate and set heights var parentItem = $(this).closest(settings.parentElement), lineheight = $('> a', parentItem).innerHeight(); $(this) .css({'line-height': lineheight + 'px', 'height': lineheight}); //Hide uls under lis and reset expand/collapse buttons $(settings.parentElement + ((settings.headersOnlyCheck) ? ' ' : '.has-subnav > ') + settings.childElement, container) .css('display', 'none'); $('.accordion-expanded') .css('display', 'none'); $('.accordion-collapsed') .css('display', 'inline-block'); }) } //Debounce function function debounce(func, wait, immediate) { var timeout; return function() { var context = this, args = arguments; var later = function() { timeout = null; if (!immediate) func.apply(context, args); }; var callNow = immediate && !timeout; clearTimeout(timeout); timeout = setTimeout(later, wait); if (callNow) func.apply(context, args); }; }; }); } })(jQuery); 

Answer 1

the error is related to the line below not finding the '.accordion-collapsed' element, due searching for parent(), whic assumes a specific dom structure. using .closest() is more flexible. one way to fix this is to replace

.parent().find('.accordion-collapsed').css('display', 'inline-block');

with

.closest('ul').find('.accordion-collapsed').css('display', 'inline-block');

line is taken from this section:

$(element).closest(settings.childElement).find('.accordion-active')
                            .removeClass('accordion-active')
                            .next(settings.childElement)
                                .slideUp(settings.slideSpeed).prev()
                                .find('.accordion-expanded')
                                    .css('display', 'none')
                                    .parent().find('.accordion-collapsed')
                                        .css('display', 'inline-block');

Answer 2

I was able to resolve this issue, I just needed to remove an extra tag from my JavaScript.

//Add expand button elements
$(' > ' + settings.childElement, this)
.before('<span class="accordion-btn-wrap"><a href="#"><span class="accordion-btn accordion-collapsed">' 
+ settings.expandButtonText + '</span><span class="accordion-btn accordion-expanded">' 
+ settings.collapseButtonText + '</span></a></span>');

I have updated my js fiddle https://jsfiddle.net/webIra7/mvtf6zve/5/