jq ajax返回值保存为全局变量

var coordinates = (function() {
    var result;
    $.ajax({
        type:'POST',
        url:'api/api.php',
        dataType:'json',
        data:{url:"http://sss.com"},
        async:false,
        success:function(data){
            result = data;
        }
    });
    return result;
})();
console.log(coordinates);