Bootstrap Carousel在滑动时滚动顶部 [英] Bootstrap Carousel scroll top when slide

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本文介绍了Bootstrap Carousel在滑动时滚动顶部的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我在BS模态中有一个BS轮播，并且轮播项内的内容很长(您必须向下滚动).因此，如果轮播项目更改，我希望页面滚动到顶部.

I have a BS carousel inside a BS modal and the content inside the carousel-items is very long (you have to scroll down). Therefore I want that the page scroll to top if the carousel item changed.

我已经为scrollTop尝试了不同的ID和类，但无法正常工作.

I've already tried different IDs and classes for scrollTop but not working.

代码 

$('#carouselExampleControls').on('slid.bs.carousel', function () {
    $('body').scrollTop(0);
    console.log('slid event');
});

FIDDLE

https://jsfiddle.net/cdheumann/ajf7vs8m/ 

$('#carouselExampleControls').on('slid.bs.carousel', function () {
    $("body").scrollTop(0);
    console.log('slid event');
});

.modal-dialog {
    max-width: 90vw;
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">

<!-- Button trigger modal -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal">
    Launch demo modal
</button>

<!-- Modal -->
<div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
    <div class="modal-dialog" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
                <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                    <span aria-hidden="true">&times;</span>
                </button>
            </div>
            <div class="modal-body">
                <div id="carouselExampleControls" class="carousel slide" data-ride="carousel">
                    <div class="carousel-inner">
                        <div class="carousel-item active">
                            <img class="d-block w-100" src="https://placeimg.com/640/1000/animals" alt="First slide">
                        </div>
                        <div class="carousel-item">
                            <img class="d-block w-100" src="https://placeimg.com/640/1000/animals" alt="Second slide">
                        </div>
                        <div class="carousel-item">
                            <img class="d-block w-100" src="https://placeimg.com/640/1000/animals" alt="Third slide">
                        </div>
                    </div>
                    <a class="carousel-control-prev" href="#carouselExampleControls" role="button" data-slide="prev">
                        <span class="carousel-control-prev-icon" aria-hidden="true"></span>
                        <span class="sr-only">Previous</span>
                    </a>
                    <a class="carousel-control-next" href="#carouselExampleControls" role="button" data-slide="next">
                        <span class="carousel-control-next-icon" aria-hidden="true"></span>
                        <span class="sr-only">Next</span>
                    </a>
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
                <button type="button" class="btn btn-primary">Save changes</button>
            </div>
        </div>
    </div>
</div>

<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>

推荐答案

在此不要使用body，而应使用.modal.

Don't use body here, use .modal instead.

$('#carouselExampleControls').on('slid.bs.carousel', function () {
    $('.modal').scrollTop(0);
    console.log('slid event');
});

您要平滑滚动吗?使用jQuery animate函数，但不要忘记包含jQuery而不是jQuery slim(包含您在内).

Do you want to scroll smoothly? use jQuery animate function but don't forget to include jQuery not jQuery slim ( that you are included ).

$('#carouselExampleControls').on('slid.bs.carousel', function () {
    $(".modal").animate({ scrollTop: 0 }, 600);
    console.log('slid event');
});

默认 

$('#carouselExampleControls').on('slid.bs.carousel', function () {
    $(".modal").scrollTop(0);
    console.log('slid event');
});

.modal-dialog {
    max-width: 90vw;
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">

<!-- Button trigger modal -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal">
    Launch demo modal
</button>

<!-- Modal -->
<div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
    <div class="modal-dialog" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
                <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                    <span aria-hidden="true">&times;</span>
                </button>
            </div>
            <div class="modal-body">
                <div id="carouselExampleControls" class="carousel slide" data-ride="carousel">
                    <div class="carousel-inner">
                        <div class="carousel-item active">
                            <img class="d-block w-100" src="https://placeimg.com/640/1000/animals" alt="First slide">
                        </div>
                        <div class="carousel-item">
                            <img class="d-block w-100" src="https://placeimg.com/640/1000/animals" alt="Second slide">
                        </div>
                        <div class="carousel-item">
                            <img class="d-block w-100" src="https://placeimg.com/640/1000/animals" alt="Third slide">
                        </div>
                    </div>
                    <a class="carousel-control-prev" href="#carouselExampleControls" role="button" data-slide="prev">
                        <span class="carousel-control-prev-icon" aria-hidden="true"></span>
                        <span class="sr-only">Previous</span>
                    </a>
                    <a class="carousel-control-next" href="#carouselExampleControls" role="button" data-slide="next">
                        <span class="carousel-control-next-icon" aria-hidden="true"></span>
                        <span class="sr-only">Next</span>
                    </a>
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
                <button type="button" class="btn btn-primary">Save changes</button>
            </div>
        </div>
    </div>
</div>

<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>

滚动动画 

$('#carouselExampleControls').on('slid.bs.carousel', function () {
    $(".modal").animate({ scrollTop: 0 }, 600);
    console.log('slid event');
});

.modal-dialog {
    max-width: 90vw;
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">

<!-- Button trigger modal -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal">
    Launch demo modal
</button>

<!-- Modal -->
<div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
    <div class="modal-dialog" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
                <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                    <span aria-hidden="true">&times;</span>
                </button>
            </div>
            <div class="modal-body">
                <div id="carouselExampleControls" class="carousel slide" data-ride="carousel">
                    <div class="carousel-inner">
                        <div class="carousel-item active">
                            <img class="d-block w-100" src="https://placeimg.com/640/1000/animals" alt="First slide">
                        </div>
                        <div class="carousel-item">
                            <img class="d-block w-100" src="https://placeimg.com/640/1000/animals" alt="Second slide">
                        </div>
                        <div class="carousel-item">
                            <img class="d-block w-100" src="https://placeimg.com/640/1000/animals" alt="Third slide">
                        </div>
                    </div>
                    <a class="carousel-control-prev" href="#carouselExampleControls" role="button" data-slide="prev">
                        <span class="carousel-control-prev-icon" aria-hidden="true"></span>
                        <span class="sr-only">Previous</span>
                    </a>
                    <a class="carousel-control-next" href="#carouselExampleControls" role="button" data-slide="next">
                        <span class="carousel-control-next-icon" aria-hidden="true"></span>
                        <span class="sr-only">Next</span>
                    </a>
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
                <button type="button" class="btn btn-primary">Save changes</button>
            </div>
        </div>
    </div>
</div>

<script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>

这篇关于Bootstrap Carousel在滑动时滚动顶部的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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