拖放与 starteffect 选项


说明

此选项用于定义可拖动对象开始拖动时要使用的效果。

默认情况下,它会在 0.2 秒内将元素的不透明度改为 0.2。

语法

new Draggable('element', {starteffect: 'effectFunction'});

其中 effectFunction 是函数,用于定义要应用的效果。

示例

<html>
   <head>
      <title>Draggables Elements</title>
		
      <script type = "text/javascript" src = "/javascript/prototype.js"></script>
      <script type = "text/javascript" src = "/javascript/scriptaculous.js"></script>
		
      <script type = "text/javascript">
         window.onload = function() {
            new Draggable('myimage', {starteffect: effectFunction('myimage')});
         }

         function effectFunction(element) {
            new Effect.Opacity(element, {from:0, to:1.0, duration:10});
         }
      </script>
   </head>
   
   <body>
      <p>This image will display very slow in the start.</p>
      <img id = "myimage" src = "/images/scriptaculous.gif"/>
   </body>
</html>

这将产生以下结果 −

scriptaculous_drag_drop.htm
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