Bootstrap手风琴,点击活动(开放)手风琴顶部滚动？

Question

我正在使用Bootstrap制作一个响应式网站,它包含大量文本的手风琴,当你读到底部并点击下一个手风琴时,大量文字被折叠,我留在页面底部.

我发现这个有用的代码从Bootstrap手风琴滚动到活动面板标题的顶部,但它滚动到所有手风琴的顶部,而不是打开的特定手风琴.

$(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); 
            }
        }); 
    });

如何修改此代码以滚动到当前活动的手风琴的顶部？

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>

Answer 1

您可以通过获取"目标元素"的顶部然后在主体上调用动画来为滚动设置动画.

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

将它修改成这样的东西将有助于你实现你所追求的目标

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

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

互补的小提琴:https://jsfiddle.net/hjugdwbp/

编辑:2018-05-25

Bootstrap 4示例

使用手风琴示例:https://getbootstrap.com/docs/4.0/components/collapse/#accordion-example 我修改了代码以支持卡片.

$('.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/

Answer 2

2021 年更新

从Bootstrap 5开始，不再需要 jQuery。这是滚动到打开的手风琴项目顶部的普通JavaScript解决方案...

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