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jQueryAjax模拟按键消抖(可设置抖动延迟时间)

2024-07-02 22:37:34   228人阅读

在硬件中,按键等都会有抖动现象,如何消除抖动,不重复触发事件呢,这就要用到消抖机制了.

这是我用jQuery模拟硬件消抖原理,额,可能是吧...又不对的地方,希望有高手指点指点.

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<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>ajax消抖Demo</title>
    <script type="text/javascript" src=http://www.mamicode.com/"js/jquery-2.0.0.min.js"></script>
    <link rel="stylesheet" type="text/css" href=http://www.mamicode.com/"css/style.css">
 
    <script type="text/javascript">
    $(function() {
        var i = 1; // 计时器计时次数
        var firstClick = true;
        var _interval;
 
        $("input").click(function(){ // 模拟按键抖动,假定抖动延迟为1s.则1s内所有按键都判定为一次按键请求
            if (i != 1) {
                firstClick = false;
            } else{
                firstClick = true;
            }
            _interval = setInterval(myTimer, 200); // 计时开始
            if (firstClick) { // 按键未抖动,ajax执行
                $(this).val("ajax中,请骚等...")
                // 模拟ajax网络延时,假设为4s,延时过程中,用户不能再次发起ajax请求
                var test = setTimeout(function(){
                    myAjax()
                },4000);
            } else{ // 按键抖动中,取消ajax
                //$(".msgBtn").css(‘display‘, ‘block‘);
                alert("111");
                return ;
            };
        });
 
        function myAjax() {
            $(".msg").css({
                    height: ‘160px‘
            });
            $(".msg").load("test.html", function() {
                $("input").val("ajax done!");
            });
            // ajax success
        }
 
        // 计时器
        function myTimer() {
            i++;
            if (i > 5)
            {
                i = 1;
                $(".msgBtn").css(‘display‘, ‘none‘);
                clearInterval(_interval);
            }
        }
    });
    </script>
</head>
<body style="text-align:center;">
    <input type="button" value=http://www.mamicode.com/"ajax" />
    <div class="msgBtn" style="display:none">上次按键抖动中...</div>
    <div class="msg">userInfo</div>
</body>
</html>

 这是ajax请求test.html文件:

<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<title></title>
	<link rel="stylesheet" href="">
</head>
<body>
	<h3 align="left">userInfo:</h3>
	<table id="teble1" border="1" cellspacing="0" cellpadding="0" align="center">
		<tr>
			<td width="100px">Name:</td>
			<td width="100px">cxs</td>
		</tr>
		<tr>
			<td width="100px">Sex:</td>
			<td width="100px">boy</td>
		</tr>
		<tr>
			<td width="100px">Age:</td>
			<td width="100px">24</td>
		</tr>
	</table>
</body>
</html>

 抖动延迟时间可以自由设置,抖动过程中用户再次点击的话判定为上一次点击,也就是一段时间内用户所有的点击都判定为一次触发点击事件.


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