Book Image

Getting Started with Web Components

By : Prateek Jadhwani
Book Image

Getting Started with Web Components

By: Prateek Jadhwani

Overview of this book

Web Components are a set of APIs that help you build reusable UI modules that can operate in any modern browser using just Vanilla JavaScript. The power of Web Components lies in their ability to build frontend web applications with or without web frameworks. With this practical guide, you will understand how Web Components can help you build reusable UI components for your modern web apps. The book starts by explaining the fundamentals of Web Components' design and strategies for using them in your existing frontend web projects. You will also learn how to use JavaScript libraries such as Polymer.js and Stencil.js for building practical components. As you progress, you will build a single-page application using only Web Components to fully realize their potential. This practical guide demonstrates how to work with Shadow DOM and custom elements to build the standard components of a web application. Toward the end of the book, you will learn how to integrate Web Components with standard web frameworks to help you manage large-scale web applications. By the end of this book, you will have learned about the capabilities of Web Components in building custom elements and have the necessary skills for building a reusable UI for your web applications.
Table of Contents (14 chapters)
Title Page
7
Implementing Web Components using Polymer and Stencil

Attributes and properties

We have been playing around with attributes since the first chapter. And we did get a brief overview of properties and how they can work along with state management to provide a more complete Web Component.

But what is the exact difference between the two? If you are a frontend developer, you must have created a form in your career. We will be looking at an example of an <input> tag:

<input type="text" value="default value" />

If you look at it carefully, we have an attribute called value giving it some default value. So if you want to get the value of this <input> tag, you can get it by using the following code:

document.querySelector('input').getAttribute('value');

So, you are directly referencing the attribute for this <input> tag to get the value. But there is another way in which...