Bootstrap 手風琴，單擊時滾動到活動（打開）手風琴的頂部？

Question

我正在使用 Bootstrap 制作一個響應式網站，它包含帶有大量文本的手風琴，當您閱讀到底部並單擊下一個手風琴時，大量文本被折疊，我留在頁面底部.

我從Bootstrap 手風琴滾動到活動面板標題的頂部找到了這個有用的代碼，但它滾動到所有手風琴的頂部，而不是打開的特定手風琴的頂部。

JS

$(function () {
    $('#accordion').on('shown.bs.collapse', function (e) {
        var offset = $('.panel.panel-default > .panel-collapse.in').offset();
        if(offset) {
            $('html,body').animate({
                scrollTop: $('.panel-heading').offset().top -20
            }, 500); 
        }
    }); 
});

如何修改此代碼以滾動到當前活動的手風琴的頂部？

HTML

<div class="panel-group custom-padding no-sides" id="accordion">                
    <div class="panel panel-default">
        <a data-toggle="collapse" data-parent="#accordion" href="#collapse1">
            <div class="panel-heading custom-padding">
                <h4 class="panel-title text-uppercase">Short synopsis <i class="fa fa-chevron-down pull-right"></i></h4>
            </div>
        </a>
        <div id="collapse1" class="panel-collapse collapse">
            <div class="panel-body">
                <p id="game-deck"></p>
            </div>
        </div>
    </div>                       
    <div class="panel panel-default">
        <a data-toggle="collapse" data-parent="#accordion" href="#collapse2">
            <div class="panel-heading custom-padding">
                <h4 class="panel-title text-uppercase">Concepts <i class="fa fa-chevron-down pull-right"></i></h4>
            </div>
        </a>
        <div id="collapse2" class="panel-collapse collapse">
            <div class="panel-body">
                <ul class="whatever" id="game-concepts"></ul>
            </div>
        </div>
    </div>                      
    <div class="panel panel-default">
        <a data-toggle="collapse" data-parent="#accordion" href="#collapse3">
            <div class="panel-heading custom-padding">
                <h4 class="panel-title text-uppercase">Themes <i class="fa fa-chevron-down pull-right"></i></h4>
            </div>
        </a>    
        <div id="collapse3" class="panel-collapse collapse">
            <div class="panel-body" id="game-themes"></div>
        </div>
    </div>

    <div class="panel panel-default">
        <a data-toggle="collapse" data-parent="#accordion" href="#collapse4">
            <div class="panel-heading custom-padding">
                <h4 class="panel-title text-uppercase">Notable locations<i class="fa fa-chevron-down pull-right"></i></h4>
            </div>
        </a>    
        <div id="collapse4" class="panel-collapse collapse">
            <div class="panel-body" id="game-locations"></div>
        </div>
    </div>

    <div class="panel panel-default">
        <a data-toggle="collapse" data-parent="#accordion" href="#collapse5">
            <div class="panel-heading custom-padding">
                <h4 class="panel-title text-uppercase">Notable characters<i class="fa fa-chevron-down pull-right"></i></h4>
            </div>
        </a>    
        <div id="collapse5" class="panel-collapse collapse">
            <div class="panel-body" id="game-characters"></div>
        </div>
    </div>

    <div class="panel panel-default">
        <a data-toggle="collapse" data-parent="#accordion" href="#collapse6">
            <div class="panel-heading custom-padding">
                <h4 class="panel-title text-uppercase">Full description <i class="fa fa-chevron-down pull-right"></i></h4>
            </div>
        </a>    
        <div id="collapse6" class="panel-collapse collapse">
            <div class="panel-body" id="game-description"></div>
        </div>
    </div>
</div>

Answer 1

您可以通過獲取“目標元素”的頂部然后在主體上調用 animate 來為滾動設置動畫。

$('html, body').animate({
    scrollTop: $("#target-element").offset().top
}, 1000);

將其修改為這樣的內容將幫助您實現您所追求的目標

$('.panel-collapse').on('shown.bs.collapse', function (e) {
    var $panel = $(this).closest('.panel');
    $('html,body').animate({
        scrollTop: $panel.offset().top
    }, 500); 
}); 

來源： http : //www.abeautifulsite.net/smoothly-scroll-to-an-element-without-a-jquery-plugin-2/

補充小提琴： https : //jsfiddle.net/hjugdwbp/

---

編輯：2018-05-25

Bootstrap 4 示例

使用手風琴示例： https : //getbootstrap.com/docs/4.0/components/collapse/#accordion-example我修改了代碼以支持卡片。

$('.collapse').on('shown.bs.collapse', function(e) {
  var $card = $(this).closest('.card');
  $('html,body').animate({
    scrollTop: $card.offset().top
  }, 500);
});

小提琴： https : //jsfiddle.net/agpkc4v2/1/

---

編輯：2019-07-18

我讓它“更漂亮”...

引導程序 3

https://jsfiddle.net/erutfgvn/

$('.panel-collapse').on('show.bs.collapse', function(e) {
  var $panel = $(this).closest('.panel');
  var $open = $(this).closest('.panel-group').find('.panel-collapse.in');
  
  var additionalOffset = 0;
  if($panel.prevAll().filter($open.closest('.panel')).length !== 0)
  {
        additionalOffset =  $open.height();
  }
  $('html,body').animate({
    scrollTop: $panel.offset().top - additionalOffset
  }, 500);
});

引導程序 4

https://jsfiddle.net/9p7f0hut/

$('.collapse').on('show.bs.collapse', function(e) {
  var $card = $(this).closest('.card');
  var $open = $($(this).data('parent')).find('.collapse.show');
  
  var additionalOffset = 0;
  if($card.prevAll().filter($open.closest('.card')).length !== 0)
  {
        additionalOffset =  $open.height();
  }
  $('html,body').animate({
    scrollTop: $card.offset().top - additionalOffset
  }, 500);
});

---

編輯：2021-04-20

引導程序 5

https://jsfiddle.net/hLzg0n2y/2/

$('.collapse').on('shown.bs.collapse', function(e) {
  var $card = $(this).closest('.accordion-item');
  var $open = $($(this).data('parent')).find('.collapse.show');
  
  var additionalOffset = 0;
  if($card.prevAll().filter($open.closest('.accordion-item')).length !== 0)
  {
        additionalOffset =  $open.height();
  }
  $('html,body').animate({
    scrollTop: $card.offset().top - additionalOffset
  }, 500);
});

Answer 2

我正在開發一個需要相同功能的項目。 想出了以下代碼。 我添加了變量以進行澄清：

$('#accordion').on('shown.bs.collapse', function (e) {

var panelHeadingHeight = $('.panel-heading').height();
var animationSpeed = 500; // animation speed in milliseconds
var currentScrollbarPosition = $(document).scrollTop();
var topOfPanelContent = $(e.target).offset().top;

if ( currentScrollbarPosition >  topOfPanelContent - panelHeadingHeight) {
    $("html, body").animate({ scrollTop: topOfPanelContent - panelHeadingHeight }, animationSpeed);
}});

Answer 3

2021 年更新

從Bootstrap 5 開始，不再需要 jQuery。 這是滾動到打開的手風琴項目頂部的香草JavaScript解決方案......

const accordionItems = document.querySelectorAll('.accordion-collapse')
const acc = document.getElementById('accordionExample')

accordionItems.forEach((el)=>{
    el.addEventListener('shown.bs.collapse',(e)=>{
        var scrollOffset = acc.scrollTop + el.parentNode.offsetTop
        acc.scroll({
            top: scrollOffset,
            left: 0, 
            behavior: 'smooth'
        })
    })
})

演示

Answer 4

$('.accordion-button').on("click",function(event){
    var accordion = $(this).parent().parent().parent();
    window.setTimeout(function(){
      $('body,html').stop().animate({ scrollTop: accordion[0].scrollHeight}, 1000);
    },100)
  }

Answer 5

這里有香草 Javascript。

在為具有手風琴折疊class 的元素提供唯一 ID (collapse-{{uniqueId}}) 之后：

let accordionItemsToBeFocused = document.querySelectorAll("[id^=collapse-]");

accordionItemsToBeFocused.forEach((el)=>{
    el.addEventListener('shown.bs.collapse',(e)=>{
        window.location.href = '#' + el.id
    })
})