下面程序里面i的值为什么是5?
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Title</title>
<script type="application/javascript" src="scripts/jquery-1.10.2.js"></script>
</head>
<body>
<button> 0 </button>
<button> 1 </button>
<button> 2 </button>
<button> 3 </button>
<button> 4 </button>
<div id="log"></div>
<script>
var logDiv = $( "#log" );
for ( var i = 0; i < 5; i++ ) {
$( "button" ).eq( i ).on( "click", { value: i}, function( event ) {
var msgs = [
"button = " + $( this ).index(),
"event.data.value = " + event.data.value,
"i = " + i
];
logDiv.append( msgs.join( ", " ) + "<br>" );
});
}
</script>
</body>
</html>
哔哔one1回答
-
慕的地6264312
这就涉及到js的闭包概念，你绑定事件的时候for循环已经走完了，如果你想点击哪个button加载对应数的button，应该使用闭包，将i值传进去。
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相关分类
JavaScript