Become a member
to unlock all features

Level Up!

Access all courses & lessons on egghead today and lock-in your price for life.


    Exclude Properties from a Type in TypeScript

    Kamran AhmedKamran Ahmed

    There might be cases where you would want to create a type while excluding some of the properties from a type. Let's say you have a database query on a users table where you are not selecting the password field. In this case, you will not be able to assign the query results to your User type because it is not going to have all the fields available.

    In this lesson, we are going to learn how we can use TypeScript's Omit utility type to exclude properties from a type.



    Become a Member to view code

    You must be a Member to view code

    Access all courses and lessons, track your progress, gain confidence and expertise.

    Become a Member
    and unlock code for this lesson




    Instructor: Here we have a type item with a bunch of required fields. Then we're getting a new item object from this type with price, currency, name, and description. Let's say that we want an item where we don't have price and currency.

    Instead of creating a new type from scratch, we can use TypeScript Omit. We'll do type priceless item is omit item, and then we omit price from here. Then we use this type for our object. Now it will give the error that the price is not there.

    If I remove it, the error will go away. We can make more fields also with the help of pipe operator. I'll put currency here now, and the currency has gone away also.