点击数据视图后，自定义数据视图格式无法复制！echarts 饼配置项内容和展示

自定义的数据格式无法通过键盘鼠标复制，无法选中，求解！！！急用

      option = {
    title: {
        text: 'Awesome Chart'
    },
    xAxis: {
        data: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']
    },
    toolbox: {
        show: true,
        feature: {
            mark: {
                show: true
            },
            dataView: {
                show: true,
                readOnly: false,
                optionToContent: function(opt) {
                    var axisData = opt.xAxis[0].data;
                    var data = opt.series[0].data;
                    var table = '<table  class="dataViewtable" style="text-align:center"><tbody>'
                    for (var i = 0, l = axisData.length; i < l; i++) {
                        table += '<tr>' +
                            '<td>' + axisData[i] + '</td>' +
                            '<td>' + data[i] + '</td>' +
                            '</tr>';
                    }
                    table += '</tbody></table>';
                    return table;
                }
            },
            magicType: {
                show: true,
                type: ['pie', 'funnel']
            },
            restore: {
                show: true
            },
            saveAsImage: {
                show: true
            }
        }
    },
    yAxis: {},
    series: [{
        type: 'bar',
        data: [220, 182, 191, 234, 290, 330, 310]
    }]
};