[TypeScript] Declaring variable as type, without a value, without a semicolon, as the last item in the <script>, messes up syntax highlighting in VS Code

[D-Marc1]

Describe the bug

Declaring the final item in the <script> as a type, without setting a value, without a semicolon, messes up the syntax highlighter:

<script lang="ts">
export let name: string
</script>

<p>{name}</p>

Reproduction

Say I have the following Svelte file:

<script lang="ts">
export let name: string
</script>

<p>{name}</p>

This will mess up the syntax highlighting.

However, the syntax highlighting is fixed by setting a default value to the variable, using a semicolon or setting a variable to a value under it:

Setting default value to variable

<script lang="ts">
export let name = ''
</script>

<p>{name}</p>

Using a semicolon

<script lang="ts">
export let name: string;
</script>

<p>{name}</p>

Setting default value to a variable as the last item in the <script>

<script lang="ts">
export let name: string
export let count = 0
</script>

<p>{name}</p>

Notice how even on GitHub's syntax highlighter, you can see the difference between by first example and last 3 ones.

Expected behaviour

The expected behavior is that declaring a variable as a type as the last item in the <script>, without setting it to value, without semicolons, shouldn't break the syntax highlighting.

System Info

• OS: MacOS
• IDE: VSCode

Which package is the issue about?

Svelte for VS Code extension

Additional Information, eg. Screenshots

Syntax highlighting breaking

Syntax highlighting working

[jasonlyu123]

Duplicate of #1970