[我正在尝试编写一个通用的React组件,该组件需要两种类型(IFoo
或IBar
)之一的props和一个接受所选类型的props的组件。
以下内容为何无效?
import React from 'react';
interface IFoo {
x: string;
}
interface IBar {
x: number;
}
const foo: React.FunctionComponent<IFoo> = (props: IFoo) => {
console.log("hello from foo!");
return <div>foo</div>
};
const bar: React.FunctionComponent<IBar> = (props: IBar) => {
console.log("hello from bar!");
return <div>bar</div>
};
interface IProps<T> {
props: T;
Component: React.FunctionComponent<T>;
}
class HigherOrderComponent<T extends IBar | IFoo> extends React.Component<IProps<T>> {
render() {
const { props, Component } = this.props;
return <Component {...props}/>
}
}
这将返回以下错误:
Type 'T' is not assignable to type 'IntrinsicAttributes & T & { children?: ReactNode; }'.
Type 'IFoo | IBar' is not assignable to type 'IntrinsicAttributes & T & { children?: ReactNode; }'.
Type 'IFoo' is not assignable to type 'IntrinsicAttributes & T & { children?: ReactNode; }'.
Type 'IFoo' is not assignable to type 'T'.
'IFoo' is assignable to the constraint of type 'T', but 'T' could be instantiated with a different subtype of constraint 'IFoo | IBar'.
Type 'T' is not assignable to type 'IntrinsicAttributes'.
Type 'IFoo | IBar' is not assignable to type 'IntrinsicAttributes'.
Type 'IFoo' has no properties in common with type 'IntrinsicAttributes'.(2322)
您需要动态创建HOC类,以便包装Component并为其输入正确的类型
import React from 'react';
interface IFoo {
x: string;
}
interface IBar {
x: number;
}
const foo: React.FunctionComponent<IFoo> = (props: IFoo) => {
console.log("hello from foo!");
return <div>foo</div>
};
const bar: React.FunctionComponent<IBar> = (props: IBar) => {
console.log("hello from bar!");
return <div>bar</div>
};
interface IProps<T> {
props: T;
Component: React.FunctionComponent<T>;
}
function createHOC<P extends IFoo | IBar>(Component: React.ComponentType<P>) {
return class HigherOrderComponent extends React.Component<P> {
render() {
return <Component {...this.props} />
}
}
}
const WrapperFooComponent = createHOC(foo)
const WrapperBarComponent = createHOC(bar)
希望对您有帮助<3