Question

我正在尝试计算页面上的节标记，但每当此脚本运行时，它返回0.任何想法？

    var sectionCount = $( "section").length;
    console.log(sectionCount);

我指望的HTML如下：

    <body>
        <div class="container">
            <section class="slide">1</section>
            <section class="slide">2</section>
            <section class="slide">3</section>
        </div>
    </body>

Answer 1

只需添加一个$(document).ready()子句，使其在加载html DOM后运行。

＆＃13;

$( document ).ready(function() {
  var sectionCount = $( "section").length;
  console.log(sectionCount);
 });

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<body>
        <div class="container">
            <section class="slide">1</section>
            <section class="slide">2</section>
            <section class="slide">3</section>
        </div>
    </body>

＆＃13;

Jquery .length保持返回0

1 个答案: