Intellisense is not working when .d.ts file contains import statement

[nandin-borjigin]

• I have searched through existing issues
• I have read through docs
• I have read FAQ

Info

• Platform: macOS
• Vetur version: 0.15.1
• VS Code version: 1.31.1

Problem

Intellisense is not working in certain case (I suppose it is related to import statement in .d.ts file)

If you're interested, the "1" after error icon in the status bar is about the incomplete statement a. in index.ts.

screenshot of this irrelavant error

Reproducible Case

Four files for reproduction:

lib/foo.d.ts

export type Foo = { prop: number }

lib/index.d.ts

export const foo: import('./foo').Foo

index.ts

import { foo } from './lib'

const a = foo

index.vue

<script lang="ts">
import { foo } from './lib'

const a = foo
</script>

You may like to clone this reproduction repo, or, generate those files with following script

IMPORTANT: RUN THIS SCRIPT IN AN EMPTY DIRECTORY

mkdir lib
echo "export type Foo = { prop: number }" > lib/foo.d.ts
echo "export const foo: import('./foo').Foo" > lib/index.d.ts
echo -e "import { foo } from './lib'\nconst a = foo" > index.ts
echo -e "<script lang="ts">\nimport { foo } from './lib'\nconst a = foo\n</script>" > index.vue

Steps

1. Hover over the a variable in index.ts file. There would be a popover widget indicating a is of type Foo
2. Hover over the a variable in index.vue file. There would be a popover widget indication a is of type any, which is WRONG.
3. In index.ts file, type in a., then a popover shows and says there is a prop property of type number under variable a
4. Repeat step 3 inside index.vue and there would be no popover.

[nandin-borjigin]

In addition, intellisense is working even in a .js file.

[nandin-borjigin]

After digging into the source code, I found that the language server (i.e. VLS) is using [email protected]. And if I switch the typescript.tsdk of the vscode to a local typescript of version 2.8.4, then same failure would reproduce in *.ts file.

[nandin-borjigin]

After upgrading typescript dependency to ^3.3.0, fixing a few typescript-api-change related errors, and adopting the solution in #1045, it's now working in my machine.

I also tested my fork in a standalnoe travis CI environment, but, sadly, it fails one test on linux (while passing all tests on macOS). I cannot proceed any further as I don't have a linux machine at my hand .

I'm leaving this issue open just in case anyone else would come to similar problem.

[octref]

Thanks. This will be resolved after we allow you to use a more recent version of TS with #682 and maybe upgrading Vetur to depend on a more recent TS.