{
  
  "usingComponents": {  
        "ec-canvas": "../components/ec-canvas/ec-canvas",
        "van-calendar": "@vant/weapp/calendar/index",
        "van-dropdown-menu": "@vant/weapp/dropdown-menu/index",
    "van-dropdown-item": "@vant/weapp/dropdown-item/index",
    "van-popup": "@vant/weapp/popup/index",
    "van-icon": "@vant/weapp/icon/index",
    "van-datetime-picker": "@vant/weapp/datetime-picker/index"
  }
}