使用外部按钮离线导出 Highcharts 图表

在此 Highcharts 图表中目标是使用图表外部的按钮进行离线导出。

我遇到的问题是，即使我添加了offline-exporting.js文件到我的申请表，如果我是not当我单击时已连接到互联网Offline Export按钮我收到错误消息，指出无法访问该 URLexport.highcharts.com.

如何修复此错误并离线导出？

HTML

  <button id="exp" >Offline Export</button>
  <div id="container" style="height: 400px; width: 500px"></div>

JavaScript：

var settings =  
        {
         "chart": {
           "type":"line"
        },
       "xAxis": { 
          "endOnTick":true
       },
       "series":[
           {"name":"series1","data":[[1,1200],[2,2200],[3,3200],[4,1800],[5,1500]]},
           {"name":"series2","data":[[1,1050],[2,2050],[3,1650],[4,1450],[5,1350]]},
           {"name":"series3","data":[[1,1250],[2,2250],[3,1850],[4,1650],[5,1550]]}]
       }


    var chart = $('#container').highcharts(settings);


    $( "#exp" ).click(function() {
        alert( "Handler for .click() called." );
        var chart = $('#container').highcharts();
            chart.exportChart({
                type: 'image/png',
                filename: 'theimage'
            });
      });

尝试使用exportChartLocal()

   $( "#exp" ).click(function() {
    alert( "Handler for .click() called." );
    var chart = $('#container').highcharts();
        chart.exportChartLocal({
            type: 'image/png',
            filename: 'theimage'
        });
  });