export let in plain js script tags breaks syntax highlighting

[canadaduane]

Describe the bug
When adding an export let in plain javascript <script> tag, it breaks the rest of the syntax highlighting:

To Reproduce
Sample:

<script>
  import RightPanel from './RightPanel.svelte'

  export let start
</script>

<!-- a 'comment with dangling apostrophe -->
<RightPanel />
<PressTabHelp />

Expected behavior
The closing </script> tag should be recognized as the end of the javascript section.

Screenshots

System (please complete the following information):

• OS: Mac OS 10.14.6
• IDE: VSCode
• Plugin/Package: "Svelte for VSCode" 101.3.0

[jasonlyu123]

Sorry. I can't reproduce this. Maybe this is an upstream issue, the syntax highlight within script tag was defined to be like "hey IDE, handle js for me". What is your VSCode version?

[canadaduane]

Hmm, interesting. I wonder what else I could look for. Here is my VS Code version info:

Version: 1.47.0
Commit: d5e9aa0227e057a60c82568bf31c04730dc15dcd
Date: 2020-07-09T08:01:54.115Z
Electron: 7.3.2
Chrome: 78.0.3904.130
Node.js: 12.8.1
V8: 7.8.279.23-electron.0
OS: Darwin x64 18.7.0

[canadaduane]

Possible hint: when I use lang="ts" it parses correctly.

Is there a way I can discover what parser/ecmascript version Svelte is handing it off to?

[jasonlyu123]

Can you try to disable any extension except svelte for vscode and see if it persist? Or try the same code in js file?
It might also be any other extension that alters the syntax highlight.

[canadaduane]

That was it! The `Babel Javascript` plugin (0.0.29) was the cause. Thanks.

…

On Sun, Jul 19, 2020 at 12:47 AM Lyu, Wei-Da ***@***.***> wrote: Can you try to disable any extension except svelte for vscode and see if it persist? It might also be any other extension that alters the syntax highlight. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#320 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAABAJCOUP4DSNSFKXPT5DR4KJHNANCNFSM4PANJVLQ> .