Does TypeScript have a union discriminator that excludes certain types?

Let's kick things off by delving into an illustrative example:

enum Season {
    Spring,
    Summer,
    Autumn,
    Winter
}
    
interface WinterForecast {
    season: Season.Winter;
    snowfall: number;
}
    
interface RestOfYearForecast {
    season: Season.Spring | Season.Summer | Season.Autumn; // Is there a way to condense this?
    rainfall: number;
}

Is there a method to specify the season in RestOfYearForecast as "all seasons except Winter" rather than listing each possible value?

typescript

Answer №1

defining the RestOfYearForecast interface which includes information about season and rainfall excluding Winter as a season

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