Services
Technology Web App Development Mobile App Development Windows App Development Database Development UI/UX Development Cloud Development SEO Digital Marketing Guest Posting Content Writing Artificial Intelligence Data Science ERP Development CRM Development CMS Development LMS Development Business Listing Blockchain Technology Startup Promotion
Products
Data Converter Cleaner TUC - Unit Converter Import Export Survey Manager Tweet Controller
Developer
Article Blog Forum Interview Beginner News Startup Quiz
Users
Career
Apply Job Internship
Pricing
Login Sign Up Get a Quote

forum

home / developersection / forums / what is the scope of a service worker, and how can it be controlled?
Ask Question

What is the scope of a service worker, and how can it be controlled?

Anubhav Sharma 1187 06 Aug 2025

What is the scope of a service worker, and how can it be controlled?

javascript javascriptservice
Updated 19 Aug 2025
Anubhav Sharma
Anubhav Sharma

Student

The Anubhav portal was launched in March 2015 at the behest of the Hon'ble Prime Minister for retiring government officials to leave a record of their experiences while in Govt service .

Message

1 Answers

Ravi Vishwakarma
Ravi Vishwakarma 18 Aug 2025
Report Abuse

Scope of a Service Worker

The scope of a service worker defines the set of pages (URLs) and requests it can control.

  • By default, the scope is limited to the directory of the service worker file and all subdirectories.
    For example:
    • If you register /sw.js, it will control / and everything under it.
    • If you register /scripts/sw.js, it will control /scripts/ and all subpaths.

How to Control Scope

When registering the service worker in JavaScript, you can explicitly set its scope using the scope option:

navigator.serviceWorker.register('/sw.js', {
  scope: '/app/'
}).then(function(registration) {
  console.log('Service Worker registered with scope:', registration.scope);
});

Here:

  • /sw.js is the service worker file.
  • scope: '/app/' means it will only control URLs starting with /app/.

Rules & Limitations

  1. Same-origin rule: The scope must be within the same origin as the service worker file.
    1. You can’t register a service worker to control another domain or higher-level path than where it is served from.
  2. Default scope: If you don’t specify scope, it defaults to the worker file’s directory and below.
  3. Max scope: The scope cannot be broader than the service worker file’s path.
    Example: If sw.js is at /app/sw.js, it cannot control / (the root).
  4. Multiple workers: Different service workers can be registered for different scopes on the same origin.

Summary:

  • Scope = which URLs the service worker controls.
  • Default = its directory + subdirectories.
  • Controlled by scope option in register().
  • Restricted by origin and path rules.
MindStick Training