event.isPropagationStopped()

类别：事件 > 事件对象

event.isPropagationStopped()返回类型：Boolean

描述： 指示event.stopPropagation()是否已经在事件对象上调用过了。

W3C DOM Level 3 specification中描述了此事件方法。

示例：

检查是否调用了event.stopPropagation()。

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<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>event.isPropagationStopped demo</title>
  <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
 
<button>click me</button>
<div id="stop-log"></div>
 
<script>
function propStopped( event ) {
  var msg = "";
  if ( event.isPropagationStopped() ) {
    msg = "called";
  } else {
    msg = "not called";
  }
  $( "#stop-log" ).append( "<div>" + msg + "</div>" );
}
 
$( "button" ).click(function(event) {
  propStopped( event );
  event.stopPropagation();
  propStopped( event );
});
</script>
 
</body>
</html>

演示：