点击并按住javascript。某事不起作用

Question

I have unknown problem with my small function "tap and hold". 我的小功能“点击并按住”存在未知问题。 Could anyone tell me what is wrong? 谁能告诉我这是怎么回事？ Thanks for help. 感谢帮助。

<!DOCTYPE html>
<html>
<body>
<button id="seconds">30</button>

<script type="text/javascript">


var timeoutId = 0;

$('#seconds').on('mousedown', function() {
timeoutId = setTimeout(alert("something"), 1000);
}).on('mouseup mouseleave', function() {
clearTimeout(timeoutId);
});

</script>
</body>
</html>

Answer 1

The problem is that your alert is being invoked immediately. 问题是您的警报将立即被调用。 You need to pass a function to setTimeout, not call a function. 您需要将一个函数传递给setTimeout，而不是调用一个函数。 I've refactored your code to make it a function and now the alert will show after 1 second if you don't move your mouse. 我已经重构了您的代码以使其发挥作用，现在如果您不移动鼠标，警报将在1秒后显示。

 var timeoutId = 0; $('#seconds').on('mousedown', function() { timeoutId = setTimeout(function(){alert("something")}, 1000); }).on('mouseup mouseleave', function() { clearTimeout(timeoutId); });

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <button id="seconds">30</button>

点击并按住javascript。某事不起作用

问题描述

1 个解决方案

解决方案1
4 2017-05-12 18:46:26

点击并按住javascript。 某事不起作用

问题描述

1 个解决方案

解决方案1 4 2017-05-12 18:46:26

点击并按住javascript。某事不起作用

解决方案1
4 2017-05-12 18:46:26