当显示一个长列表的选项时,您可以简单地为 autocomplete 菜单设置 max-height 来防止菜单显示太长。尝试键入 "a" 或 "s" 来获得一个可滚动的长列表的结果。

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI 自动完成(Autocomplete) - 可滚动的结果</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css">
  <script src="//code.jquery.com/jquery-1.9.1.js"></script>
  <script src="//code.jquery.com/ui/1.10.4/jquery-ui.js"></script>
  <link rel="stylesheet" href="http://jqueryui.com/resources/demos/style.css">
  <style>
  .ui-autocomplete {
    max-height: 100px;
    overflow-y: auto;
    /* 防止水平滚动条 */
    overflow-x: hidden;
  }
  /* IE 6 不支持 max-height
   * 我们使用 height 代替,但是这会强制菜单总是显示为那个高度
   */
  * html .ui-autocomplete {
    height: 100px;
  }
  </style>
  <script>
  $(function() {
    var availableTags = [
      "ActionScript",
      "AppleScript",
      "Asp",
      "BASIC",
      "C",
      "C++",
      "Clojure",
      "COBOL",
      "ColdFusion",
      "Erlang",
      "Fortran",
      "Groovy",
      "Haskell",
      "Java",
      "JavaScript",
      "Lisp",
      "Perl",
      "PHP",
      "Python",
      "Ruby",
      "Scala",
      "Scheme"
    ];
    $( "#tags" ).autocomplete({
      source: availableTags
    });
  });
  </script>
</head>
<body>
 
<div class="ui-widget">
  <label for="tags">标签:</label>
  <input id="tags">
</div>
 
 
</body>
</html>