我正在尝试重新创建美国失业情况的 jVectorMap 示例可视化。我直接从github https://github.com/bjornd/jvectormap-examples/tree/master/us-unemployment。地图无法加载，控制台给出以下错误：“jvm 未定义。”
这是代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>Maps</title>
<link rel="stylesheet" media="all" href="../jvectormap/jquery-jvectormap.css"/>
<link rel="stylesheet" media="all" href="css/jquery-ui-1.8.21.custom.css"/>
<script src="../jvectormap/tests/assets/jquery-1.8.2.js"></script>
<script src="../jquery-jvectormap.js"></script>
<script src="../jvectormap/tests/assets/jquery-jvectormap-us-aea-en.js"></script>
<script src="jquery-ui-1.8.21.custom.min.js"></script>
<script>
$(function(){
$.getJSON('data.json', function(data){
var val = 2009;
statesValues = jvm.values.apply({}, jvm.values(data.states)),
metroPopValues = Array.prototype.concat.apply([], jvm.values(data.metro.population)),
metroUnemplValues = Array.prototype.concat.apply([], jvm.values(data.metro.unemployment));
$('.map').vectorMap({
map: 'us_aea_en',
markers: data.metro.coords,
series: {
markers: [{
attribute: 'fill',
scale: ['#FEE5D9', '#A50F15'],
values: data.metro.unemployment[val],
min: jvm.min(metroUnemplValues),
max: jvm.max(metroUnemplValues)
},{
attribute: 'r',
scale: [5, 20],
values: data.metro.population[val],
min: jvm.min(metroPopValues),
max: jvm.max(metroPopValues)
}],
regions: [{
scale: ['#DEEBF7', '#08519C'],
attribute: 'fill',
values: data.states[val],
min: jvm.min(statesValues),
max: jvm.max(statesValues)
}]
},
onMarkerLabelShow: function(event, label, index){
label.html(
'<b>'+data.metro.names[index]+'</b><br/>'+
'<b>Population: </b>'+data.metro.population[val][index]+'</br>'+
'<b>Unemployment rate: </b>'+data.metro.unemployment[val][index]+'%'
);
},
onRegionLabelShow: function(event, label, code){
label.html(
'<b>'+label.html()+'</b></br>'+
'<b>Unemployment rate: </b>'+data.states[val][code]+'%'
);
}
});
var mapObject = $('.map').vectorMap('get', 'mapObject');
$(".slider").slider({
value: val,
min: 2005,
max: 2009,
step: 1,
slide: function( event, ui ) {
val = ui.value;
mapObject.series.regions[0].setValues(data.states[ui.value]);
mapObject.series.markers[0].setValues(data.metro.unemployment[ui.value]);
mapObject.series.markers[1].setValues(data.metro.population[ui.value]);
}
});
});
})
</script>
</head>
<body>
<div class="map" style="width: 800px; height: 600px"></div>
<div class="slider" style="width: 280px; margin: 10px"></div>
</body>
</html>
