type SuccessState = {
result: 'success';
response : {
body: string:
}
}
type FailState = {
result: 'fail';
reson: string;
}
type LoginState = SucessState | FailState;
function login(id: string, pw:string): LoginState {
return {
result : 'success',
response : {
body: string:
}
}
}
//printLoginState(state)
//success -> body
//fail -> reason
function printLoginState(state : LoginState){
if(state.result === "success"){
console.log(state.response.body)
}else{
console.log(state.reason);
}
}