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如何使用 Owl Carousel v2 获取当前元素的 ID？

$('.owl-carousel').on('dragged.owl.carousel', function(e) {
   // get id; only one slide visible in this case

});

<div class="owl-carousel owl-theme">
    <div class="item" id='1'><h4>1</h4></div>
    <div class="item" id='2'><h4>2</h4></div>
    <div class="item" id='3'><h4>3</h4></div>
    <div class="item" id='4'><h4>4</h4></div>
    <div class="item"><h4>5</h4></div>
    <div class="item"><h4>6</h4></div>
    <div class="item"><h4>7</h4></div>
    <div class="item"><h4>8</h4></div>
    <div class="item"><h4>9</h4></div>
    <div class="item"><h4>10</h4></div>
    <div class="item"><h4>11</h4></div>
    <div class="item"><h4>12</h4></div>
</div>

如果第一张幻灯片可见，回调将返回“1”。

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