您可以将XMLHttpRequest用于ajax和JSON.parse用于解析json :)
var xmlhttp = new XMLHttpRequest();
xmlhttp.open('GET', '//example.org', true);
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4) {
if(xmlhttp.status == 200) {
var obj = JSON.parse(xmlhttp.responseText);
var countryList = obj.countrylist;
}
}
};
xmlhttp.send(null);
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