Build a bar chart library with web components

The text explores the process of creating a bar chart library using web components, emphasizing the use of technologies like Custom Elements, Shadow DOM, and HTML Templates to develop shareable UI controls. It details the creation of a bar component with Custom Elements that allows for declarative usage through HTML, offering a reactive system via observable attributes and lifecycle methods. The article further explains how to construct a bar chart area using Shadow DOM for encapsulation, ensuring a consistent and isolated internal structure while enabling scoped styling. Additionally, it discusses the implementation of category and linear scale axes to enhance the visualization's functionality, detailing how custom events serve as a communication mechanism between components to facilitate updates without direct coupling. The piece concludes by highlighting the advantages of web components in building customizable, lightweight chart libraries that integrate seamlessly into web applications, offering an alternative to more complex chart libraries.