mdn / mdn/browser-compat-data

api.ServiceWorker - WebView on iOS does have support via App Bound Domains

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browser:webview_ios data:api
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Description

What type of issue is this?

Incorrect support data (example: BrowserX says "86" but support was added in "40")

What information was incorrect, unhelpful, or incomplete?

WKWebView does not support service workers for all domains at once but it can for up to 10 domains on an app via App Bound Domains.

What browsers does this problem apply to, if applicable?

WKWebView on iOS

What did you expect to see?

That service workers are supported for up to 10 domains via App Bound Domains

Did you test this? If so, how?

I've used this feature in an app some years ago for 4 domains and it worked as expected.

Can you link to any release notes, bugs, pull requests, or MDN pages related to this?

https://stackoverflow.com/a/64155509/3255152

https://webkit.org/blog/10882/app-bound-domains/

Do you have anything more you want to share?

Thank you for all the great information and data on your site!

MDN URL

https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker

MDN metadata
MDN page report details
  • Query: api.ServiceWorker
  • Report started: 2025-08-01T23:45:05.925Z

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the api.ServiceWorker entry in the browser-compat-data JSON and review its current WKWebView support data. Compare the entry with the linked WebKit App Bound Domains information, update the compatibility statement to reflect support for up to 10 domains, and run the repository's data validation checks.

Written by the indexing model from the issue text.

Assessment

Tech stack
json
Domain
web-dev
Issue type
Bug
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
68/100

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