By completing this course, learners will:

• Build custom reusable UI components using Web Components APIs.

• Apply Shadow DOM for encapsulation and style isolation.

• Use HTML Templates and Slots for flexible UI design.

• Integrate components into framework and non-framework apps.

• Create scalable design systems for organizations.

Course Syllabus

Module 1: Introduction to Web Components

• What are Web Components?

• Advantages over framework-based components

• Browser support and polyfills

Module 2: Custom Elements

• Defining custom elements with JavaScript classes

• Lifecycle callbacks (connectedCallback, disconnectedCallback)

• Attributes and properties

Module 3: Shadow DOM

• Encapsulation of DOM and styles

• Open vs closed shadow roots

• Styling strategies with Shadow DOM

Module 4: HTML Templates & Slots

• <template> and <slot> elements

• Reusing templates in multiple components

• Named slots and default content

Module 5: Advanced Features

• Events and communication between components

• Accessibility in Web Components

• Internationalization and localization

Module 6: Integrations

• Using Web Components in React, Vue, and Angular

• Compatibility with Svelte and Next.js

• Publishing components to npm

Module 7: Design Systems with Web Components

• Creating a component library

• Theming and customization strategies

• Case study: Enterprise UI kit

Module 8: Real-World Projects

• Modal dialog component

• Custom form inputs with validation

• Dashboard widgets with data bindings

Module 9: Deployment & Optimization

• Bundling with Rollup and Webpack

• Performance best practices

• Testing with Jest and Web Test Runner

Module 10: Future of Web Components

• Standards evolution (CSS Shadow Parts, Declarative Shadow DOM)

• Web Components vs framework trends

• Building enterprise-ready ecosystems

Learners will receive a Certificate of Completion from Uplatz, validating their expertise in Web Components and reusable UI development. This certification demonstrates readiness for roles in frontend development, UI/UX engineering, and enterprise design system creation.

Web Components expertise opens opportunities as:

• Frontend Developer (UI Libraries)

• Full-Stack Developer

• UI/UX Engineer

• Design System Architect

• Web Standards Engineer

Web Components are increasingly adopted in large-scale applications and enterprise design systems, making them a valuable skill for modern developers.

1. What are Web Components?
   They are a set of web standards (Custom Elements, Shadow DOM, HTML Templates) for creating reusable UI elements.

2. What is Shadow DOM and why is it used?
   Shadow DOM provides encapsulation, isolating styles and DOM structure from the main document.

3. How do Custom Elements work?
   They are defined with JavaScript classes and registered using customElements.define().

4. What is the difference between attributes and properties in Web Components?

• Attributes → defined in HTML, always strings.

• Properties → JavaScript object values.

5. What are slots in Web Components?
   Slots are placeholders in templates that allow customizable content insertion.

6. How do Web Components integrate with frameworks like React or Vue?
   They work as native DOM elements, though some frameworks may require wrappers for props/events.

7. What are the benefits of Web Components over React?
   Framework independence, reusability, encapsulation, and longevity as a browser-native standard.

8. How do you ensure accessibility in Web Components?
   By using ARIA roles, semantic HTML, and proper keyboard navigation.

9. What are real-world use cases of Web Components?
   Design systems, dashboards, form controls, widgets, and cross-framework apps.

10. Where are Web Components widely used?
    In Google, Salesforce, Adobe, and enterprise-scale UI libraries.