Reactjs 如何为React.Children.map定义typescript
我有一个函数,可以查看提供的子元素,如果找到特定的元素类型,它会自动向其中添加一些属性 函数的调用方式如下:Reactjs 如何为React.Children.map定义typescript,reactjs,typescript,Reactjs,Typescript,我有一个函数,可以查看提供的子元素,如果找到特定的元素类型,它会自动向其中添加一些属性 函数的调用方式如下: render () { const { children, name, className } = this.props; return ( <div className={className}> {this.enrichRadioElements(children, name)} </div&
render () {
const { children, name, className } = this.props;
return (
<div className={className}>
{this.enrichRadioElements(children, name)}
</div>
)
}
enrichRadioElements = (children: Array<any>, name: string) => (
React.Children.map(children, child => {
if (!React.isValidElement(child)) {
return child;
}
//@ts-ignore
if (child.props.children) {
child = React.cloneElement(child, {
//@ts-ignore
children: this.enrichRadioElements(child.props.children, name)
});
}
if (child.type === Radio) {
return React.cloneElement(child, {
onChange: this.handleFieldChange,
selectedValue: this.state.selectedValue,
name: name
})
}
else {
return child;
}
})
)
它看起来有一个任意类型的“props”(如果我读得正确的话),但是typescript无法识别children属性。问题在于两个方面。我首先将
children:Array
更改为children:React.ReactNode
。您已经在那里签入了一个复选框,可以将类型从ReactNode缩小到ReactElement。诀窍是1。使用isValidElement
和2中的泛型类型参数。使用带有类型赋值的新变量elementType
,而不是处理和变异子参数EnrichedChildren
可能需要更新以匹配您的用例
interface EnrichedChildren {
onChange(): void
selectedValue: string
name: string
children?: React.ReactNode
}
enrichRadioElements = (children: React.ReactNode, name: string): any =>
React.Children.map(children, child => {
if (!React.isValidElement<EnrichedChildren>(child)) {
return child
}
let elementChild: React.ReactElement<EnrichedChildren> = child
if (child.props.children) {
elementChild = React.cloneElement<EnrichedChildren>(elementChild, {
children: this.enrichRadioElements(elementChild.props.children, name),
})
}
if (elementChild.type === 'Radio') {
return React.cloneElement(elementChild, {
onChange: () => {},
selectedValue: 'value',
name: name,
})
} else {
return elementChild
}
})
接口丰富了孩子们{
onChange():void
selectedValue:字符串
名称:string
子节点?:React.ReactNode
}
enrichRadioElements=(子项:React.ReactNode,名称:string):any=>
React.Children.map(Children,child=>{
如果(!React.isValidElement(子项)){
返回儿童
}
让elementChild:React.ReactElement=child
if(child.props.children){
elementChild=React.cloneElement(elementChild{
children:this.enrichRadioElements(elementChild.props.children,name),
})
}
if(elementChild.type==='Radio'){
返回React.cloneElement(elementChild{
onChange:()=>{},
selectedValue:'值',
姓名:姓名,,
})
}否则{
返回元素子对象
}
})
interface EnrichedChildren {
onChange(): void
selectedValue: string
name: string
children?: React.ReactNode
}
enrichRadioElements = (children: React.ReactNode, name: string): any =>
React.Children.map(children, child => {
if (!React.isValidElement<EnrichedChildren>(child)) {
return child
}
let elementChild: React.ReactElement<EnrichedChildren> = child
if (child.props.children) {
elementChild = React.cloneElement<EnrichedChildren>(elementChild, {
children: this.enrichRadioElements(elementChild.props.children, name),
})
}
if (elementChild.type === 'Radio') {
return React.cloneElement(elementChild, {
onChange: () => {},
selectedValue: 'value',
name: name,
})
} else {
return elementChild
}
})