typescript TS1005 error when importing types from type definition

Question

One of the libraries (parse5) used by my project is exposing typing information (in .d.ts files) using the following syntax to import types:

import { type CharacterToken, type DoctypeToken, type TagToken, type EOFToken, type CommentToken } from '../common/token.js';

This is causing a bunch of typescript errors when running the application, since it looks like typescript doesn't recognise this why of importing types.

If I change the syntax to

import type { CharacterToken, DoctypeToken, TagToken, EOFToken, CommentToken } from '../common/token.js';

I don't get any error.

might it be that I'm using a wrong tsc version?

Christopher Cerny · Accepted Answer · 2023-07-25 10:22:42Z

2

The syntax used in the 'parse5' package for importing types was introduced with Typescript 4.5: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-4-5.html#type-modifiers-on-import-names

I ran into the same problem on a project using typescript 4.4, and upgrading to 4.5 resolved the issue for me.

Checking the open issues on parse5 revealed that many people have the same problem, e.g. look at https://github.com/inikulin/parse5/issues/913#issuecomment-1520222908

answered Jul 25, 2023 at 10:22

Christopher Cerny

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TheTS · Accepted Answer · 2022-08-16 08:32:41Z

1

In TypeScript(3.8) you should use import type { SomeThing } from "./some-module.js";, not import { type SomeThing } from "./some-module.js";

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answered Aug 16, 2022 at 8:32

TheTS

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