我的网站想要在xAxis.afterSetExtremes时使用一个函数。但是在IE7中，当我在xAxis中选择一个范围时，第二次单击无法停止选择。为什么呢？
此问题仅发生在IE7中。
测试页面为：Here
整个代码是：
<!DOCTYPE html>
<html lang="zh_CN">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
<link rel="stylesheet" href="/css/bootstrap.min.css">
<link rel="stylesheet" href="/css/huidu.css">
<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
<!--[if lt IE 9]>
<script src="/js/html5shiv.min.js"></script>
<script src="/js/respond.min.js"></script>
<![endif]-->
</head>
<body>
<div class="container">
<div class="panel panel-default">
<div class="panel-body">
<div id="diantui" style="min-width:300px;height:400px">
</div>
</div>
</div>
<script>
function togglePlotbands() {
this.plotLinesAndBands.forEach(function(plotband) {
var ii = 1;
});
}
window.onload = function(){
var all_data = [];
all_data.push({x:1495641600000 , y: 1});
all_data.push({x:1497110300000 , y: 3});
all_data.push({x:1497210300000 , y: 4});
all_data.push({x:1497410300000 , y: 3});
all_data.push({x:1497510300000 , y: 2});
all_data.push({x:1497715300000 , y: 1});
all_data.push({x:1500134400000 , y: 2});
var hc_obj = {
chart: {
type: 'line',
zoomType: 'x',
renderTo: 'diantui',
events: {
load: function() {
togglePlotbands.call(this.xAxis[0]);
}
}
},
xAxis: {
plotBands: [
{color: '#FFFFEF',from: 1497110400000,to: 1497715200000,label: {text: 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxfsdfsfsdfsfsdf'}}
],
events: {
afterSetExtremes: togglePlotbands
}
},
plotOptions: {
line: {
connectNulls: true,
marker: {
enabled: false
},
}
},
series: [
]
};
hc_obj['series'].push({name: 'xxx', data: all_data, visible: true});
var chart = new Highcharts.Chart(hc_obj);
}
</script>
</div>
<script src="//cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script>
<script src="//cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
<script src="http://cdn.hcharts.cn/highcharts/highcharts.js"></script>
<script src="http://cdn.hcharts.cn/highcharts/modules/exporting.js"></script>
<script src="/js/ie10-viewport-bug-workaround.js"></script>
</body>
</html>