‘App‘ cannot be used as a JSX component. Its return type ‘Element[]‘ is not a valid JSX element.
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2022-04-28 09:05:15
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记录最近在用ts写react遇到的一个问题:
代码如下:
function App() {
const nameArray:string[] = ['Bob','Jack','Mary'];
return(
nameArray.map((name:string)=>{
return(
<div>{name}</div>
)
})
)
}
然后报错:
‘App’ cannot be used as a JSX component. Its return type ‘Element[]’ is not a valid JSX element.
解决办法1:把函数组件App的返回值设置为any类型即可解决。
function App():any {
const nameArray:string[] = ['Bob','Jack','Mary'];
return(
nameArray.map((name:string)=>{
return(
<div>{name}</div>
)
})
)
}
export default App;
解决办法2:把函数组件App的返回值改写成JSX元素类型的。
代码如下:
function App():JSX.Element {
const nameArray:string[] = ['Bob','Jack','Mary'];
return(
<div>
{
nameArray.map((name:string)=>{
return(
<div>{name}</div>
)
})
}
</div>
)
}
export default App;
运行结果: