转发ref进行反应FC给出类型错误:类型'IntrinsicAttributes&Props&{children:? ReactNode}

问题描述

我正在这里学习如何使用前向引用。我有一个FC,需要在其中初始化所有引用,然后将它们传递给它的孩子,这样我可以获取一些chartjs图表的画布实例。但是,使用forwardRef时出现类型错误,指出ref不是孩子的财产。

const BUIDashboard: React.FC = () => {
    const chartRef = React.createRef<RefObject<HorizontalBar>>()
.
.
.
    return (

      <Child 
          ref={chartRef} <------------------- TYPE ERROR HERE
          isLoading={isLoadingChild}
          data={childData} />
     )
}

孩子没有任何错误,但是它是这样设置的

type Props = {
  rootProps?: DashboardCardProps
  isLoading?: boolean
  data?: BUIMetrics['breachBreakdownByOutcome']
}

const Child: React.FC<Props> = React.forwardRef(({ rootProps,isLoading,data },ref: RefObject<HorizontalBar>) => {

    return (
      <HorizontalBar ref={ref}/>
    )
}

我为孩子定义的参数错误吗?

我认为问题可能是这条线

const Child: React.FC<Props>

所以我将道具类型更新为

type Props = {
  rootProps?: DashboardCardProps
  isLoading?: boolean
  data?: BUIMetrics['breachBreakdownByOutcome']
} & { ref: RefObject<HorizontalBar> }

然而,Child组件声明会引发此错误

TS2322: Type 'ForwardRefExoticComponent<Pick<Props,"rootProps" | "isLoading" | "data"> & RefAttributes<HorizontalBar>>' is not assignable to type 'FC<Props>'.
  Types of property 'defaultProps' are incompatible.
    Type 'Partial<Pick<Props,"rootProps" | "isLoading" | "data"> & RefAttributes<HorizontalBar>> | undefined' is not assignable to type 'Partial<Props> | undefined'.
      Type 'Partial<Pick<Props,"rootProps" | "isLoading" | "data"> & RefAttributes<HorizontalBar>>' is not assignable to type 'Partial<Props>'.
        Types of property 'ref' are incompatible.
          Type '((instance: HorizontalBar | null) => void) | RefObject<HorizontalBar> | null | undefined' is not assignable to type 'RefObject<HorizontalBar> | undefined'.
            Type 'null' is not assignable to type 'RefObject<HorizontalBar> | undefined'.

这也是公然的广告,但我正在设法解决此问题,以解决下面链接的另一个问题。如果您对此问题有任何见解,也请告诉我。谢谢。 Using react-pdf with react-chartjs-2 to generate a pdf

解决方法

type Props = {
  rootProps?: DashboardCardProps
  isLoading?: boolean
  data?: BUIMetrics['breachBreakdownByOutcome']
}

const Child = React.forwardRef<RefObject<HorizontalBar>,Props>(({ rootProps,isLoading,data,children },ref) => {
    return (
      <HorizontalBar ref={ref}/>
    );
})