主页 / 问题 / 581812
Accepted
Bim Bam
Asked:2020-10-24 00:39:39 +0000 UTC2020-10-24 00:39:39 +0000 UTC

.scroll() 事件上最简单的脚本不起作用

  • 772
<script>
    $(document).ready(function(){

        $(window).scroll(function(){
            if ($(this).scrollTop() >= 100) {
                alert("100!");
            } 
        });

    });
</script>

为什么当我滚动页面时警报没有触发？

javascript

1 个回答

  1. Best Answer

    显式引用窗口：

    $(document).ready(function() {

  $(window).scroll(function() {
    console.log($(window).scrollTop());
    if ($(window).scrollTop() >= 100) {
      alert("100!");
    }
  });

});
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
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