Question

我正在尝试用jQuery做一些简单的事情但是很难。我想做以下

循环遍历每个li元素并检查它是否已应用特定类“timeline-inverted”
如果我正在寻找的课程存在于li上，那么我想再申请一些课程'可见动画fadeInRight'
如果该类不存在，那么我想应用另一个类'visible animated fadeInLeft'

这是我到目前为止所拥有的......

HTML输出

<ul class="timeline">
    <li class="hidden">
        <div class="timeline-image">
            <img class="img-circle img-responsive" src="assets/img/about/1.jpg" alt="">
        </div>
        <div class="timeline-panel">
            <div class="timeline-heading">
                <h4>2009-2010</h4>
                <h4 class="subheading">Our Humble Beginnings</h4>
            </div>
            <div class="timeline-body">
                <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Sunt ut voluptatum eius sapiente, totam reiciendis temporibus qui quibusdam, recusandae sit vero unde, sed, incidunt et ea quo dolore laudantium consectetur!</p>
            </div>
        </div>
    </li><!-- /timeline item -->
    <li class="timeline-inverted hidden">
        <div class="timeline-image">
            <img class="img-circle img-responsive" src="assets/img/about/1.jpg" alt="">
        </div>
        <div class="timeline-panel">
            <div class="timeline-heading">
                <h4>March 2011</h4>
                <h4 class="subheading">An Agency is Born</h4>
            </div>
            <div class="timeline-body">
                <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Sunt ut voluptatum eius sapiente, totam reiciendis temporibus qui quibusdam, recusandae sit vero unde, sed, incidunt et ea quo dolore laudantium consectetur!</p>
            </div>
        </div>
    </li><!-- /timeline item -->
    <li class="hidden">
        <div class="timeline-image">
            <img class="img-circle img-responsive" src="assets/img/about/1.jpg" alt="">
        </div>
        <div class="timeline-panel">
            <div class="timeline-heading">
                <h4>July 2014</h4>
                <h4 class="subheading">Phase Two Expansion</h4>
            </div>
            <div class="timeline-body">
                <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Sunt ut voluptatum eius sapiente, totam reiciendis temporibus qui quibusdam, recusandae sit vero unde, sed, incidunt et ea quo dolore laudantium consectetur!</p>
            </div>
        </div>
    </li><!-- /timeline item -->
    <li class="timeline-inverted hidden">
        <div class="timeline-image">
            <img class="img-circle img-responsive" src="assets/img/about/1.jpg" alt="">
        </div>
        <div class="timeline-panel">
            <div class="timeline-heading">
                <h4>December 2014</h4>
                <h4 class="subheading">Another great month</h4>
            </div>
            <div class="timeline-body">
                <p>It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.</p>
            </div>
        </div>
    </li><!-- /timeline item -->
    <li class="timeline-inverted">
        <div class="timeline-image">
            <h4>
                Be Part
                <br>Of Our
                <br>Story!
            </h4>
        </div>
    </li><!-- /.timeline -->
</ul>

Jquery的

$('.timeline li').each(function () {
    if ($(this).hasClass("timeline-inverted")) {
        $('.timeline li').removeClass("hidden").viewportChecker({
            classToAdd: 'visible animated fadeInRight', offset: 100
        });

    } else {
        $(this).removeClass("hidden").viewportChecker({
            classToAdd: 'visible animated fadeInLeft', offset: 100
        });
    }
});

如果li项具有时间轴反转类，我希望它从右侧飞入，如果它没有时间轴反转类，我希望它从左侧飞入！

谢谢保罗

*编辑 - 此代码适用于我：）

$(function () {
    $('.timeline li').each(function () {
        if ($(this).hasClass("timeline-inverted")) {
            $(this).removeClass("hidden").viewportChecker({
                classToAdd:'visible animated fadeInRight', offset: 100
            });

        } else {
            $(this).removeClass("hidden").viewportChecker({
                classToAdd: 'visible animated fadeInLeft', offset: 100
            });
        }
    });
});

Answer 1

您无需使用each()。你可以这样做。

$('.timeline li.timeline-inverted').removeClass("hidden").viewportChecker({
    classToAdd: 'visible animated fadeInRight',
    offset: 100
});

$('.timeline li').not('.timeline-inverted').removeClass("hidden").viewportChecker({
    classToAdd: 'visible animated fadeInLeft',
    offset: 100
});

Answer 2

尝试这一点：将您的脚本放在$(function(){..});内并使用$(this)代替$('.timeline li')。

$(function(){
  $('.timeline li').each(function () {
        if ($(this).hasClass("timeline-inverted")) {
            $(this).removeClass("hidden").addClass('visible animated fadeInRight').viewportChecker({
                offset: 100
            });

        } else {
            $(this).removeClass("hidden").addClass('visible animated fadeInLeft').viewportChecker({
                offset: 100
            });
        }
    });
});

jQuery循环遍历每个li并检查一个类

2 个答案: