fix(Content): [Web API ] update autonomous custom elements example

[kemilbeltre]

Description

Motivation

Additional details

Related issues and pull requests

Fixes #28450

[github-actions]

Preview URLs

• /en-US/docs/Web/API/Web_components/Using_custom_elements

(comment last updated: 2023-08-10 09:24:55)

[sideshowbarker]

@kostasx Can you please review https://github.com/mdn/content/pull/28480/files and confirm whether it resolves issue #28450 to your satisfaction?

[kostasx]

@sideshowbarker The addition of connectedCallback(){ certainly makes things more clear, but the problem is that the source code found on line 129 points to a file that contains the code within a constructor method instead which is a bit confusing.

[kemilbeltre]

@sideshowbarker The addition of connectedCallback(){ certainly makes things more clear, but the problem is that the source code found on line 129 points to a file that contains the code within a constructor method instead which is a bit confusing.

It has also been requested to be updated.

[sideshowbarker]

After looking at mdn/web-components-examples#57 it seems like the code fix there is actually preferable, and the same change should be made to the content of the article