jQuery 获取“无法读取未定义引导程序的属性”偏移量“
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Getting 'cannot read property 'offsetwidth' of undefined bootstrap
提问by Pallavi Manohar
I get the offsetwidthundefined in spite of adding active class and also defining my jquery just above my js function. I have to use carousel for my work and I tried a mock one for practice. My first active image is displaying and after I click next I get this error in console and the images are not sliding.
offsetwidth尽管添加了活动类并在我的 js 函数上方定义了我的 jquery，但我还是得到了undefined 。我必须在我的工作中使用轮播，我尝试了一个模拟的来练习。我的第一个活动图像正在显示，单击下一步后，我在控制台中收到此错误并且图像没有滑动。
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css">
<title>mycooking</title>
</head>
<body>
<!--indicatiors-->
<div class="container">
<div class="row-fluid">
<div id="myCarousel" class="carousel slide" data-ride="carousel">
<ol class="carousel-indicators">
<li data-target="#myCarousel" data-slide-to="0" class="active"></li>
<li data-target="#myCarousel" data-slide-to="1"></li>
<li data-target="#myCarousel" data-slide-to="2"></li>
</ol>
<!--wrapper for slides-->
<div class="carousel-inner" role="listbox">
<div class="item-active">
<img class="first-slide" src="/img/dosa.jpg" alt="dosa" />
</div>
<div class="item">
<img class="second-slide" src="/img/idli.jpg" alt="idli" />
</div>
<div class="item">
<img class="third-slide" src="img/vada.jpg" alt="vada" />
</div>
</div>
<!--Left and right controls-->
<a class="left carousel-control" href="#myCarousel" role="button" data-slide="prev">
<span class="glyphicon glyphicon-chevron-left" aria-hidden="true"></span>
<span class="sr-only">Previous</span>
</a>
<a class="right carousel-control" href="#myCarousel" role="button" data-slide="next">
<span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</a>
</div>
</div>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js" type="text/javascript"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script>
<script type="text/javascript">
jQuery(document).ready(function () {
$("#myCarousel").carousel({
interval: 1200
})
});
</script>
</body>
</html>
回答by Ted
Change this line in your HTML:
更改 HTML 中的这一行：
<div class="item-active">
to
到
<div class="item active">
That hyphen shouldn't be there. If you need an item-activeclass, add it after those two, like <div class="item active item-active">. itemand activeare classes bootstrap uses to run the carousel. Without them on that first slide, you'll get that error.
那个连字符不应该在那里。如果你需要一个item-active类，在这两个之后添加它，比如<div class="item active item-active">. item并且active是引导程序用来运行轮播的类。如果第一张幻灯片上没有它们，您将收到该错误。
HTH, -Ted
HTH, -Ted
