Web Components with Stencil Cheat Sheet

Building web components with Stencil. Component API, decorators, styling, and distribution.

Last Updated: December 24, 2025

Component Structure

@Component decorator, class-based

Key concept 1: component structure
Comprehensive explanation and practical examples for implementing component structure in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 2: component structure
Comprehensive explanation and practical examples for implementing component structure in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 3: component structure
Comprehensive explanation and practical examples for implementing component structure in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 4: component structure
Comprehensive explanation and practical examples for implementing component structure in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 5: component structure
Comprehensive explanation and practical examples for implementing component structure in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 6: component structure
Comprehensive explanation and practical examples for implementing component structure in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.

Properties & State

@Prop, @State, @Watch

Key concept 1: properties & state
Comprehensive explanation and practical examples for implementing properties & state in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 2: properties & state
Comprehensive explanation and practical examples for implementing properties & state in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 3: properties & state
Comprehensive explanation and practical examples for implementing properties & state in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 4: properties & state
Comprehensive explanation and practical examples for implementing properties & state in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 5: properties & state
Comprehensive explanation and practical examples for implementing properties & state in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.

Events

@Event, EventEmitter, custom events

Key concept 1: events
Comprehensive explanation and practical examples for implementing events in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 2: events
Comprehensive explanation and practical examples for implementing events in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 3: events
Comprehensive explanation and practical examples for implementing events in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 4: events
Comprehensive explanation and practical examples for implementing events in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 5: events
Comprehensive explanation and practical examples for implementing events in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 6: events
Comprehensive explanation and practical examples for implementing events in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.

Lifecycle Methods

componentWillLoad, render, componentDidLoad

Key concept 1: lifecycle methods
Comprehensive explanation and practical examples for implementing lifecycle methods in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 2: lifecycle methods
Comprehensive explanation and practical examples for implementing lifecycle methods in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 3: lifecycle methods
Comprehensive explanation and practical examples for implementing lifecycle methods in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 4: lifecycle methods
Comprehensive explanation and practical examples for implementing lifecycle methods in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 5: lifecycle methods
Comprehensive explanation and practical examples for implementing lifecycle methods in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.

Styling

Shadow DOM, CSS variables, themes

Key concept 1: styling
Comprehensive explanation and practical examples for implementing styling in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 2: styling
Comprehensive explanation and practical examples for implementing styling in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 3: styling
Comprehensive explanation and practical examples for implementing styling in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 4: styling
Comprehensive explanation and practical examples for implementing styling in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 5: styling
Comprehensive explanation and practical examples for implementing styling in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 6: styling
Comprehensive explanation and practical examples for implementing styling in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.

Distribution

Build output, framework integrations

Key concept 1: distribution
Comprehensive explanation and practical examples for implementing distribution in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 2: distribution
Comprehensive explanation and practical examples for implementing distribution in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 3: distribution
Comprehensive explanation and practical examples for implementing distribution in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 4: distribution
Comprehensive explanation and practical examples for implementing distribution in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 5: distribution
Comprehensive explanation and practical examples for implementing distribution in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
💡 Pro Tip: Master the fundamentals of Web Components with Stencil first before diving into advanced features. Practice with real-world projects and refer to this comprehensive cheatsheet for quick reference and best practices.
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