highchairts柱状图显示数值并且带单位

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$(target).highcharts({                     chart: {                         type: 'bar'                     },                     colors: [                         "#1ab394"                     ],                     title: {                         text: title                     },                     legend: {                         enabled: false                     },                     exporting: {                         enabled: false                     },                     credits: {                         enabled: false                     },                     xAxis: {                         categories: categories                     },                     yAxis: {                         min: 0,                         title: {                             text: label + "(" + unit + ")"                         }                     },                     tooltip: {                         shared: true,                     },                     plotOptions: {                         series: {                             dataLabels: {                                 enabled: true,      //设置柱状图显示数值                                   formatter: function () {                                     return this.point.y + '%';  // 设置柱状图显示数值并且带单位                                 },                             },                         }                     },                     series: [{                         name: label,                         tooltip: {                             valueSuffix: unit                         },                         data: data                     }]                 });             }         }