I am handling a response like this:
const response : {
a : string,
b : string
} | {
message : string
} = callFunc();
When using it in my code, I have:
response.message && doSomething(message);
However, TypeScript is showing an error that property "message" does not exist on the first type defined. How can I resolve this issue?
It is important to check if the message property exists in the union type variable response before accessing it
if ('message' in response) {
performAction(response.message)
}
To successfully access the message property in the first type of JSON, follow this example:
const responseData : { x : string, y : string, message:string } | { message : string } = fetchData();
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