在 React + Typescript 中铸造样式组件

Question

我正在尝试在 React + Typescript 中实现动画。

interface IImageProps {
    frame: number
    width: number
    src: string
    onLoad: () => void
}

const Image = styled.img`
    transform: ${(props: IImageProps) => css`translate(0, -${props.frame * props.width}px)`};
`

这会在控制台中引发警告：

styled-components.browser.esm.js:1507 Over 200 classes were generated for component styled.img. 
Consider using the attrs method, together with a style object for frequently changed styles.

所以我试图使用attrs：

const Image = styled.img.attrs((props: IImageProps) => ({
    style: { transform: `translate(0, -${props.frame * props.width}px)` },
}))``

现在 TS 抱怨说：

Type '{ src: string; onLoad: () => void; width: number; frame: number; }' is not assignable to type 'IntrinsicAttributes & Pick<Pick<Pick<Pick<DetailedHTMLProps<ImgHTMLAttributes<HTMLImageElement>, HTMLImageElement>, "src" | "width" | "children" | "style" | "title" | ... 255 more ... | "useMap"> & { ...; } & { ...; }, "src" | ... 259 more ... | "useMap"> & Partial<...>, "src" | ... 260 more ... | "useMap"> & { ...;...'.
  Property 'frame' does not exist on type 'IntrinsicAttributes & Pick<Pick<Pick<Pick<DetailedHTMLProps<ImgHTMLAttributes<HTMLImageElement>, HTMLImageElement>, "src" | "width" | "children" | "style" | "title" | ... 255 more ... | "useMap"> & { ...; } & { ...; }, "src" | ... 259 more ... | "useMap"> & Partial<...>, "src" | ... 260 more ... | "useMap"> & { ...;...'.

我可以通过铸造来克服它 const Image = ... `` as any

但我不喜欢那样any。对于熟悉样式组件代码的人来说，这可能是一个简单的答案......

Answer 1

您需要将 添加IImageProps到最终标记的模板调用中，以表明这些是您的样式化组件除了<img>道具之外添加的自定义道具：

const Image = styled.img.attrs((props: IImageProps) => ({
  style: { transform: `translate(0, -${props.frame * props.width}px)` },
}))<IImageProps>``

请注意，您还可以将类型注释从 移动(props: IImageProps)到.attrs类型参数：

const Image = styled.img.attrs<IImageProps>(props => ({
  style: { transform: `translate(0, -${props.frame * props.width}px)` },
}))<IImageProps>``

这样一来，props将是您的自定义界面加上全内置的道具img。