即使值未更改，jQuery UI 滑块“更改”事件也会触发
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jQuery UI slider 'change' event fires even when value has not changed
提问by SexyBeast
I am trying to fire an event when a user slides the slider and the value is changed when the sliding stops. As per the jQuery docs, the changeevent would be ideal for this case. So I am trying this out:
我试图在用户滑动滑块时触发事件，并且在滑动停止时更改值。根据 jQuery 文档，该change事件非常适合这种情况。所以我正在尝试这个：
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>jQuery UI Slider - Default functionality</title>
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.2/themes/smoothness/jquery-ui.css" />
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script src="http://code.jquery.com/ui/1.10.2/jquery-ui.js"></script>
<link rel="stylesheet" href="/resources/demos/style.css" />
<script>
$(function() {
$( "#slider" ).slider({
change:function() { alert("foo"); }
});
});
</script>
</head>
<body>
<div id="slider"></div>
</body>
</html>
However, I observe that when I drag the slider to the right and again drag it back to the starting point (the initial position of the slider at page-load), the alert still fires. Is this a jQuery bug? If no, how do I fix this?
但是，我观察到当我向右拖动滑块并再次将其拖回到起点（页面加载时滑块的初始位置）时，警报仍然会触发。这是一个jQuery错误吗？如果不是，我该如何解决这个问题？
回答by isherwood
$(function() {
$("#slider").slider();
var startPos = $("#slider").slider("value");,
endPos = '';
$("#slider").on("slidestop", function(event, ui) {
endPos = ui.value;
if (startPos != endPos) {
// do stuff
}
startPos = endPos;
});
});
回答by Haroldo Torres
Just try.
你试一试。
$(function() {
$("#slider").slider({
slide: function(event, ui) {
// use ui.value to get a number
// do your functions
}
});
});
