typescript TypeScript中键入的Redux操作和Reducer的问题

Posted 2021-05-21

interface IAction {
    type: string
}

interface IActionA extends IAction {
    a: string
}

interface IActionB extends IAction {
    b: string
}

const reducer = (action: IAction) {
    switch (action.type) {
        case 'a':
            return console.info('action a: ', action.a) // property 'a' does not exists on type IAction

        case 'b':
            return console.info('action b: ', action.b) // property 'b' does not exists on type IAction         
    }
}