Learn LIT with Real Code Examples
Updated Nov 22, 2025
Practical Examples
Custom button element
Modal dialog component
Data table with reactive properties
Date picker widget
Notification/toast element
Troubleshooting
Ensure properties are reactive using @property
Check Shadow DOM encapsulation
Verify template syntax
Confirm custom element tag registration
Use console logs for lifecycle debugging
Testing Guide
Unit tests with Mocha/Chai or Jest
Component tests with @web/test-runner
E2E testing with Playwright
Snapshot testing of templates
Testing events & properties
Deployment Options
Static hosting (Netlify, Vercel, GitHub Pages)
Integrated in existing web apps
CDN-hosted web components
Embedded widgets
Lit components as NPM packages
Tools Ecosystem
Lit CLI tools
Open-wc tooling
Vaadin components
Storybook integration
Testing with @web/test-runner
Integrations
React (via wrappers)
Angular (via wrappers)
Vue (via wrappers)
Tailwind CSS
Storybook
Productivity Tips
Use minimal reactive properties
Keep components small & focused
Leverage Shadow DOM for styles
Reuse components via slots
Lazy-load large components
Challenges
Build a custom button
Create a reusable modal
Make a reactive form element
Develop a data table component
Publish a component library