Is it possible to extend types in Typescript

0 votes

Say if I have the following type:

type Event = {
   name: string;
   dateCreated: string;
   type: string;
}

I now want to extend this type, i.e.

type UserEvent extends Event = {
   UserId: string; 
}

This doesn't work. How can I do this?

Jun 3, 2022 in TypeSript by Logan
• 2,140 points
270 views

1 answer to this question.

0 votes

you can intersect types:

type TypeA = {
    nameA: string;
};
type TypeB = {
    nameB: string;
};
export type TypeC = TypeA & TypeB;

somewhere in you code you can now do:

const some: TypeC = {
    nameB: 'B',
    nameA: 'A',
};
answered Jun 7, 2022 by Nina
• 3,020 points

Related Questions In TypeSript

0 votes
1 answer

Is it necessary to learn TypeScript first before going to explore Angular2?

It's not necessary to learn TypeScript but ...READ MORE

answered Jun 10, 2022 in TypeSript by Nina
• 3,020 points
133 views
0 votes
0 answers

What is TypeScript and why would I use it in place of JavaScript?

Can you please describe what the TypeScript ...READ MORE

Jul 18, 2022 in TypeSript by Logan
• 2,140 points
125 views
0 votes
1 answer

How to create ES6 Map in Typescript

Refer this as an example this.configs = new ...READ MORE

answered May 31, 2022 in TypeSript by Nina
• 3,020 points
268 views
0 votes
1 answer

How to declare and initialize a Dictionary in Typescript

Apparently this doesn't work when passing the ...READ MORE

answered May 31, 2022 in TypeSript by Nina
• 3,020 points
4,765 views
0 votes
1 answer

How to set meta tags using Angular universal SSR and ngx-seo plug-in?

first Install the plug-in with npm i ngx-seo ...READ MORE

answered Feb 11, 2022 in Others by narikkadan
• 63,160 points
1,725 views
0 votes
1 answer

How to use next-seo for setting nextjs meta tag with multiple OGP images?

https://github.com/garmeeh/next-seo use this git repo that contains ...READ MORE

answered Feb 24, 2022 in Others by narikkadan
• 63,160 points
2,002 views
0 votes
0 answers

how to sign bitcoin psbt with ledger?

I'm trying to sign a PSBT transaction ...READ MORE

Mar 9, 2022 in Blockchain by Soham
• 9,700 points
1,035 views
0 votes
1 answer

Can't bind to 'ngModel' since it isn't a known property of 'input'

Just add this in the app.module.ts file: import { FormsModule ...READ MORE

answered Apr 30, 2022 in Other DevOps Questions by narikkadan
• 63,160 points
3,487 views
0 votes
1 answer

What is TypeScript and why would I use it in place of JavaScript?

TypeScript is a superset of JavaScript which primarily ...READ MORE

answered May 31, 2022 in TypeSript by Nina
• 3,020 points
206 views
0 votes
1 answer

What is "not assignable to parameter of type never" error in TypeScript?

All you have to do is define ...READ MORE

answered May 31, 2022 in TypeSript by Nina
• 3,020 points
36,312 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP