我正在使用JSON数据直接填充JVectorMaps(及其他)。大多数常见指标的最新统计信息可通过json在线获得-因此此脚本应使您可以快速,轻松地提取所需的任何数据。我只是还不太了解格式代码,因为我对JQuery和JS非常陌生。我在被困的地方打了一个问号。
理想情况下,获取和数据脚本可以采用ind_id变量和标签,以在Vector Map上显示任何指标,而不仅仅是我在此处用作示例的一个GDP(NY.GDP.MKTP.CD)指标。
document.addEventListener('DOMContentLoaded', () => {
console.log("loaded")
fetchCountryData()
})
function fetchCountryData () {
fetch('http://api.worldbank.org/v2/country/all/indicator/NY.GDP.MKTP.CD?format=json&mrv=1&per_page=300)
//
.then(resp => resp.json())
.then(data => {
let country.id = data[1]
let value = data[1]
create-GDP-Data(country.id,value)
})
}
function create-GDP-Data(country.id,value){
let gdpData = ?
}
$('#world-map-gdp').vectorMap({
map: 'world_mill',
series: {
regions: [{
values: gdpData,
scale: ['#C8EEFF', '#0071A4'],
normalizeFunction: 'polynomial'
}]
},
onRegionTipShow: function(e, el, code){
el.html(el.html()+' (GDP - '+gdpData[code]+')');
}
});
GDP数据(gdpData)的格式应如下:
var gdpData = {
"AF": 16.63,
"AL": 11.58,
"DZ": 158.97,
...
};
您知道请求的数据集返回的数据结构与jVectorMap
所需的数据结构有所不同。因此,您需要的是从传入数据到后者的重新映射。
为了使这种方法更加灵活,我的建议是使用简单的remapper函数,您可以在其中传递传入字段的名称,然后接收该值。
请参阅下面我提案中的评论以获取更多信息:
DEMO:动态加载jVectorMap区域数据集
$(function() {
/* Handler for jQuery .ready() */
function mapper(data, key) {
/* Deep search for a key, return the value found. */
var keys = key.split('.'), value = data[keys.shift()];
for (i=0, l=keys.length; i<l; i++) {value = value[keys[i]]}
return value;
}
function showMapValues(map, schema, values, min, max) {
var regions = map.series.regions[0];
/* Reset the scale min & max, allow recomputation. */
regions.params.min = min;
regions.params.max = max;
regions.setValues(values.regions);
map.dataSetName = schema.dataSetName;
map.dataSetFormat = schema.dataSetFormat;
}
function fetchCountryData(url, params, schema, map) {
$.ajax({
url: url,
dataType: 'json',
data: params,
success: function(result) {
var values = {regions: {}, markers: {}},
dataSet = result[schema.dataSetIndex];
/* Loop over the returned dataset and invoke remap. */
$.each(dataSet, function(i, item) {
var code = mapper(item, schema.countryCodeField),
value = mapper(item, schema.countryValueField) || 0;
/* Find out if this is a valid region inside the map. */
var isRegionCode = typeof map.regions[code] !== 'undefined';
/* Find out if this is a valid marker inside the map. */
var isMarkerCode = typeof map.markers[code] !== 'undefined';
/* Fill two separate datasets for regions & markers. */
if(isRegionCode) values.regions[code] = value;
if(isMarkerCode) values.markers[code] = value;
});
/* Dynamically update the map with the new values */
showMapValues(map, schema, values);
},
error: function(request, textStatus, errorThrown) {
console.log("error:",request, textStatus, errorThrown);
}
});
}
var worldMap = new jvm.Map({
map: 'world_mill_en',
container: $('#world-map'),
zoomOnScroll: true,
regionsSelectable: true,
regionsSelectableOne: true,
backgroundColor: "aliceblue",
markers: [], /* Initialize the map with empty markers */
series: {
regions: [{
values: {}, /* Initialize the map with empty region values */
scale: ['#C8EEFF', '#0071A4'],
normalizeFunction: 'polynomial'
}],
/* Initialize the map with empty marker values */
markers: [{attribute: 'fill', scale: {}, values: []}]
},
onRegionTipShow: function(e, el, code){
var value = worldMap.series.regions[0].values[code],
formattedValue = new Intl.NumberFormat('en-US', worldMap.dataSetFormat).format(value);
el.text(el.text() + ' (' + worldMap.dataSetName + ': ' + formattedValue + ')');
}
});
var url = 'https://api.worldbank.org/v2/country/all/indicator/NY.GDP.MKTP.CD',
params = 'format=json&mrv=1&per_page=300',
/* Define the data type & the location of the relevant fields inside the incoming data */
schema = {
dataSetName: 'GDP',
dataSetFormat: {style: 'currency', currency: 'USD'},
dataSetIndex: 1,
countryCodeField: 'country.id',
countryValueField: 'value'
};
fetchCountryData(url, params, schema, worldMap);
});
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/jquery-jvectormap.min.css" type="text/css">
<script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/jquery-jvectormap.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/tests/assets/jquery-jvectormap-world-mill-en.js"></script>
</head>
<body>
<div id="world-map" style="width: 600px; height: 400px"></div>
</body>
</html>