在Angular中使用Chart.js 2.9.3时遇到问题：https://github.com/chrispahm/chartjs-plugin-dragdata
导入的插件：chartjs-plugin-dragdata。将dragdata添加到选项中：

this.comboChart1 = new Chart("bar1", {
  type: "bar",

  options: {

    dragData: true,

    onDragStart: function (e) {
    },

    onDrag: function (e, datasetIndex, index, value) {
      // console.log(datasetIndex, index, value)
    },

    onDragEnd: function (e, datasetIndex, index, value) {
      // console.log(datasetIndex, index, value)
    },
    //Set Formatting

  },

但是，“dragData”未被识别为图表选项。以下是错误消息：

Type '{ plugins: { zoom: { pan: { enabled: true; mode: string; sensitivity: number; }; zoom: { enabled: true; mode: string; sensitivity: number; }; }; }; responsive: true; title: { display: true; text: any; position: "top"; fontSize: number; }; ... 6 more ...; onDragEnd: (e: any, datasetIndex: any, index: any, value: any)...' is not assignable to type 'ChartOptions'.
  Object literal may only specify known properties, and 'dragData' does not exist in type 'ChartOptions'.ts(2322)
index.d.ts(278, 9): The expected type comes from property 'options' which is declared here on type 'ChartConfiguration'

Receiving the following error:
index.d.ts(278, 9): The expected type comes from property 'options' which is declared here on type 'ChartConfiguration'

**更新：**问题已解决，解决方法分两步：1.将插件降级到1.1.13，以兼容Chart.js 2.9.3。2.扩展chartOptions接口。添加缺少的属性后：dragdata，ondragstart，ondrag，ondragend，插件开始使用上面的选项代码。