[BUG] Missing CSS/JS when generating without `singleFile`

[Shurtu-gal]

Describe the bug.

When generating docs with @asyncapi/html-template version 3.3.0+, the generated index.html references CSS and JS files, but they are not created in the output folder when singleFile is not used.

With 3.2.0, both singleFile=true and singleFile=false modes worked correctly. Starting with 3.3.0, only singleFile=true works.

Tip

I suspect the issue is with the new conditional generation added.

Expected behavior

• If singleFile=true: generate one standalone HTML file with bundled CSS/JS (works fine in 3.3.1 also).
• If singleFile=false (or not passed): generate index.html + referenced css/ and js/ assets (broken in 3.3.0+).

Screenshots

How to Reproduce

1. Run: ./bin/run generate fromTemplate asyncapi.yaml @asyncapi/html-template -o ../docs --use-new-generator --force-write

2. Example spec (simplified):

asyncapi: 3.0.0
info:
  title: Account Service
  version: 1.0.0
channels:
  userSignedup:
    address: user/signedup
    messages:
      UserSignedUp:
        $ref: '#/components/messages/UserSignedUp'
components:
  messages:
    UserSignedUp:
      payload:
        type: object
        properties:
          email:
            type: string

3. Open the generated index.html in the browser.

4. Notice that it references CSS/JS files, but none are generated.

🖥️ Device Information [optional]

• Operating System (OS):
• Browser:
• Browser Version:

👀 Have you checked for similar open issues?

• I checked and didn't find similar issue

🏢 Have you read the Contributing Guidelines?

• I have read the Contributing Guidelines

Are you willing to work on this issue ?

None

[github-actions]

Welcome to AsyncAPI. Thanks a lot for reporting your first issue. Please check out our contributors guide and the instructions about a basic recommended setup useful for opening a pull request.
Keep in mind there are also other channels you can use to interact with AsyncAPI community. For more details check out this issue.