The Starters Guide to Service Workers

The Starters Guide to Service Workers

Take a quick look at The Starters Guide to Service Workers. The service worker is just a fancy piece of JavaScript, which we can install into a clients browser and which will then run independently of the server itself, without needing an active connection.

One of the best additions to browser capabilities in recent years was the addition of service workers and offline support in general. We can now preload data, like articles or network intensive data like pictures, style-sheets or JavaScript libraries, from our web service. This is extremely useful for mobile devices in regions with unstable or slow internet connection. (…like this backwater country in the middle of Europe I am living in.)

Basics

The general approach is, to check for new content, whenever there is an internet connection (or access to WLAN) and display it on demand. The service worker is just a fancy piece of JavaScript, which we can install into a clients browser and which will then run independently of the server itself, without needing an active connection.

We generally need two JavaScript snippets for this:

  • the service worker itself, which must be it’s own file
  • the registration of this service worker, which can be inline

The relative position of the registration snippet within the website matters! A register.js in /static/js/ will register a service-worker in this sub-path/scope,

meaning the service worker won’t be doing anything when navigating to for example /something/ or the web root. For now, place register.js in the web root (so it will be available at /register.js).

It’s also important to note, that service workers require HTTPS, even in a test setup, the browser won’t accept any service worker not served via a secure connection. If you don’t have an HTTPS capable web-server, here is a quick tutorial on how to set up one.

javascript

Bootstrap 5 Complete Course with Examples

Bootstrap 5 Tutorial - Bootstrap 5 Crash Course for Beginners

Nest.JS Tutorial for Beginners

Hello Vue 3: A First Look at Vue 3 and the Composition API

Building a simple Applications with Vue 3

Deno Crash Course: Explore Deno and Create a full REST API with Deno

How to Build a Real-time Chat App with Deno and WebSockets

Convert HTML to Markdown Online

HTML entity encoder decoder Online

Hire Dedicated JavaScript Developers -Hire JavaScript Developers

Hire dedicated JavaScript Developers who are proficient in AngularJS, ReactJS, NodeJS, & VueJS frameworks. Get flexible hiring models as per your business requirements.

JavaScript Shopping Cart - Javascript Project for Beginners

JavaScript Shopping Cart - javascript shopping cart tutorial for beginnersBuy me a coffee 🍺 https://www.paypal.com/paypalme/ziddahSource Code: https://bit....

The essential JavaScript concepts that you should understand

The essential JavaScript concepts that you should understand - For successful developing and to pass a work interview

Data Types In JavaScript

JavaScript data types are kept easy. While JavaScript data types are mostly similar to other programming languages; some of its data types can be unique. Here, we’ll outline the data types of JavaScript.

Introduction With Basic JavaScript

Introduction With Basic JavaScript - Unlike most programming languages, the JavaScript language has no concept of input or output. It is designed to run as a scripting language in a host environment, and it is up to the host environment to provide mechanisms for communicating with the outside world.