我有这样的代码
interface FormState {
cardNumber: string,
month: string,
year: string
}
handleInputChange = (event: React.ChangeEvent<MaskedInput>) => {
this.setState({
[event.target.name]: event.target.value
});
};
TypeScript不知道event.target
的name
属性是什么,但我知道它总是匹配FormState
键。与value
属性类似。
我尝试用类型断言修复它,但仍然得到错误
type ObjectKey<T> = keyof T;
type ValueOf<T> = T[keyof T];
[event.target.name as ObjectKey<FormState>]: event.target.value as ValueOf<FormState>
我该如何解决这个问题?
只需在React中添加目标名称的类型。ChangeEvent:
handleInputChange = (event: React.ChangeEvent<{name: keyof FormState}>) => {
由于您正在处理输入更改,因此更好的类型将是React.ChangeEvent<HTMLInputElement>
:
type TargetName=keyof FormState
const handleInputChange = (event: React.ChangeEvent<HTMLInputElement>) => {
let name = event.target.name as TargetName
name===''
};