在反应中使用打字稿,无状态组件不可分配到类型“React.SFC" [英] Using typescript in react,stateless component not assignable to type 'React.SFC'
问题描述
打字稿:2.8.3
@类型/反应:16.3.14
TypeScript: 2.8.3
@types/react: 16.3.14
函数组件中返回的类型是JSX.Element
,当我将组件声明为React.SFC
(React.StatelessComponent
>).
The type of return in function component is JSX.Element
, when I declare the component to React.SFC
(alias of React.StatelessComponent
).
出现三个错误:
TS2322:类型 'Element' 不可分配给类型 'StatelessComponent<{}>',类型 'Element' 不匹配签名 '(props: { children?: ReactNode; }, context?: any): ReactElement
'
TS2339:属性 'propTypes' 不存在于类型 '(props: LayoutProps) =>StatelessComponent<{}>'
TS2339:属性 'defaultProps' 不存在于类型 '(props: LayoutProps) =>StatelessComponent<{}>'
<小时>
interface ItemInterface {
name: string,
href: string,
i18n?: string[]
}
interface LayoutHeaderItemProps extends ItemInterface{
lang: string,
activeHref: string,
}
function LayoutHeaderItem (props: LayoutHeaderItemProps): React.SFC{
const {name, href, lang, activeHref, i18n} = props
const hrefLang = /\//.test(href) ? `/${lang}` : ''
if (!i18n.includes(lang)) return null
return (
<a
className={`item${href === activeHref ? ' active' : ''}`}
key={href}
href={hrefLang + href}
><span>{name}</span></a>
)
}
LayoutHeaderItem.propTypes = {
lang: string,
activeHref: string,
name: string,
href: string,
i18n: array
}
LayoutHeaderItem.defaultProps = {i18n: ['cn', 'en']}
推荐答案
返回类型不是组件,函数本身就是组件:
The return type is not a component, the function itself is a component:
const LayoutHeaderItem: React.SFC<LayoutHeaderItemProps> =
(props: LayoutHeaderItemProps) => {
// ...
}
这个问题有点老了,SFC
已弃用,取而代之的是带有 FC
别名的 FunctionComponent
This question is a bit old, SFC
deprecated in favor of FunctionComponent
with a FC
alias
const LayoutHeaderItem: React.FC<LayoutHeaderItemProps> =
(props: LayoutHeaderItemProps) => {
// ...
}
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