How do I export default with type?

Question

How can I rewrite this so that I don't have the const?

const theme: ITheme = { color: 'blue' };
export default theme;

The following will disable type checks which is not what I want.

export default  {color: Blue} as ITheme

May be related

• export { default as x } does not infer type but diffent usage.

Answer 1

For TypeScript 4.9+ you can use the satisfies keyword to ensure the type is statically checked:

export default { color: 'blue' } satisfies ITheme;

This will guarantee the type is valid, but may set a more specific type ({ color: 'blue' } instead of ITheme). If you need the more generic type, use satisfies and as:

export default { color: 'blue' } satisfies ITheme as ITheme;