不工作阻止使用鼠标滚轮js滚动父对象

Question

在最新的谷歌Chrome浏览器中，我试图阻止家长使用鼠标滚轮滚动，但它不起作用。所以我需要一些代码的解释。

$(function() {


var toolbox = $('#68').find('.medium-folder-body'),

//The medium-folder-body height - 500px here
height = toolbox.height(),

//scrollHeight 693px (I got the height but don't understand what is that for)
//what is .get(0) ?
scrollHeight = toolbox.get(0).scrollHeight;

toolbox.bind('mousewheel', function(e, d) {

//This is js question which I don't understand often - What is 'this'?
//Second question. What is d?
    if((this.scrollTop === (scrollHeight - height) && d < 0) || (this.scrollTop === 0 && d > 0)) {
      alert(this.scrollTop);
    }
  });

});

这个html很乱。我在这里让它变得简单

<div class="folder">
   <div class="header"></div>
   <div class="medium-folder-body">
     <ul class="photo-lists></ul>
   </div>
   <div class="footer"></div>
</div>

文件夹体css height:500px overflow-y:scroll

Answer 1

您没有包含处理鼠标滚轮滚动方向数据的附加插件：

<script src="https://github.com/brandonaaron/jquery-mousewheel/raw/master/jquery.mousewheel.js"></script>

http://jsfiddle.net/ExplosionPIlls/ZQgfr/