Here is a snippet of code I'm working with:
interface Notification {
message: TemplatedEmail & Email, //current attempt which doesnt do what I want
}
interface Destination {
ccAddresses?: string[],
bccAddresses?: string[],
toAddresses: string[]
}
interface TemplatedEmail {
destination: Destination,
source: string,
template: string,
templateData: any,
replyToAddresses?: string[]
}
interface Email {
destination: Destination,
source: string,
body: string,
subject: string,
replyToAddresses?: string[]
}
I am trying to ensure that the message property of Notifications can be either of type Email or TemplatedEmail. This means that all properties (optional ones too) of either Email should be present in message, or all properties of TemplatedEmail. With Union Types, I can only access common properties, and with intersection types, I get all properties from both.
The issue arises when trying something like this:
const x: Notification = {
message: {
destination: { toAddresses: [ "" ] },
source: "",
body: "",
subject: ""
}
};
This causes an error indicating that the properties template and templateData are missing from x.