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javascript - 错误 "Property ' type' is missing in type 'typeof WithXXX' "

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我将 React 与 Typescript 结合使用,并尝试基于 react-dnd 库创建高阶组件。错误发生在react-dnd组件的DragSource部分。这是相应的代码:

import React from 'react';
import { DragSource, ConnectDragSource, DragSourceConnector, DragSourceMonitor } from 'react-dnd';
import ItemTypes from './itemTypes'

const collect = (connect: DragSourceConnector, monitor: DragSourceMonitor) => {
return {
connectDragSource: connect.dragSource(),
isDragging: monitor.isDragging()
}
}

const templateObjectSource = {
beginDrag(props: any) {
return {}
}
}

export interface TemplateObjectCollectedProps {
canDrop: boolean
isOver: boolean
connectDragSource: ConnectDragSource
}

export interface TemplateObjectProps {
name?: string
}

function withTemplateObjectDraggable(WrappedComponent: React.ComponentClass<TemplateObjectProps>) {
return class WithTemplateObjectDraggable extends React.Component<TemplateObjectCollectedProps> {
public render() {
return this.props.connectDragSource(
<div>
<WrappedComponent {...this.props} />
</div>
)
}
}
}

export default DragSource(ItemTypes.TEXTFIELD, templateObjectSource, collect)(withTemplateObjectDraggable)

Typescript 在最后一行给我以下错误,特别是在“(withTemplateObjectDraggable)”部分:

[ts]
Argument of type '(WrappedComponent: ComponentClass<TemplateObjectProps, any>) => typeof WithTemplateObjectDraggable' is not assignable to parameter of type 'ComponentType<ComponentClass<TemplateObjectProps, any>>'.
Type '(WrappedComponent: ComponentClass<TemplateObjectProps, any>) => typeof WithTemplateObjectDraggable' is not assignable to type 'FunctionComponent<ComponentClass<TemplateObjectProps, any>>'.
Type 'typeof WithTemplateObjectDraggable' is not assignable to type 'ReactElement<any>'.
Property 'type' is missing in type 'typeof WithTemplateObjectDraggable'. [2345]

我不确定我是否错误地使用了高阶组件,或者它是否只是一个类型主题。不幸的是,我没有找到将 react-dnd 与其他高阶组件结合起来的示例,所以我可能走错了路。如果你能给我提供一个链接到一个工作的 typescript (或 javascript)示例,它在 react-dnd 中的“DragSource”之上实现了一个高阶组件,它已经对我有帮助了,因为我找不到一个。

仅供引用:然后我会像这样使用高阶组件:

import React from 'react';
import imgTextfield from '../../../../../assets/templateObjects/textfield.png'
import withTemplateObjectDraggable from './withTemplateObjectDraggable'

class Textfield extends React.Component {
public render() {
return (
<span>
<img src={imgTextfield} />
<div> Textfield </div>
</span>
)
}
}

export default withTemplateObjectDraggable(Textfield)

最佳答案

看来你的逻辑有点不对。 DragSource 需要一个 React 组件作为输入,但您正试图将您的 withTemplateObjectDraggable HOC 传入。因此 Typescript 提示类型不兼容。

我不是 100% 确定它是否有效,但请尝试将 DragSource 移动到您的 HOC 中,如下所示:

function withTemplateObjectDraggable(WrappedComponent: React.ComponentClass<TemplateObjectProps>) {
class WithTemplateObjectDraggable extends React.Component<TemplateObjectCollectedProps> {
public render() {
return this.props.connectDragSource(
<div>
<WrappedComponent {...this.props} />
</div>,
);
}
}

return DragSource(ItemTypes.TEXTFIELD, templateObjectSource, collect)(WithTemplateObjectDraggable);
}

关于javascript - 错误 "Property ' type' is missing in type 'typeof WithXXX' ",我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53807202/

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