export typescript type in svelte file

I want to export the type that I defined in one of my files and import it inside another file.

export type myNewType = {name: string};

linter show me bellow error when I add export:

Modifiers cannot appear here.

I can make it work by creating a new ts file and import the type from it. I just want to know if there is a way to define type inside svelte file or not.

Update:

I use the sapper template and it will run without error but TS functionality not work and show me errors in vscode when importing type and export type from svelte file.