Design System with Web Components

with Web Components Overview

with Web Components lets you structure design systems work so it stays readable, testable, and easy to scale. Instead of ad-hoc code, you follow a clear pattern that other developers can recognise immediately.

The key is to keep with web components focused and predictable. Start from the minimal example here, then layer in only the complexity your feature actually needs.

import { LitElement, html, css } from 'lit';

export class DsButton extends LitElement {
  static styles = css`
    button { padding: var(--space-2) var(--space-4); }
  `;
  render() {
    return html`<button part="button"><slot></slot></button>`;
  }
}
customElements.define('ds-button', DsButton);

Web components built with Lit work in any framework and expose CSS parts for controlled styling.

with Web Components Example

/* Tokens flow into components, which flow into products */
:root { --color-brand-500: #2563eb; }
.button { background: var(--color-brand-500); }

• Start from a minimal with Web Components example and grow it only as needed.
• Keep configuration explicit so with Web Components behaves the same in every environment.
• Name things clearly so teammates understand your with Web Components at a glance.
• Add tests around with Web Components early to lock in expected behaviour.

Design System Cheatsheet

Quick reference for with web components within a modern design system.

How with Web Components Fits into a Design System

with Web Components connects the design decisions in your system to the code teams actually ship. When it is defined once and reused, products stay consistent and updates roll out everywhere.

Web components built with Lit work in any framework and expose CSS parts for controlled styling.

• Define it once as a token or shared component.
• Document intended usage with clear examples.
• Make it themeable and accessible by default.
• Version and release changes so consumers can upgrade safely.

Getting Teams to Adopt with Web Components

Adoption is where design systems succeed or stall. Make with web components the easiest option: great docs, sensible defaults, and clear migration paths beat mandates every time.

Common Mistakes

• Skipping error handling and edge cases when wiring up with web components.
• Leaving with web components untested, so regressions slip into production.
• Over-engineering with web components before you actually need the extra flexibility.
• Ignoring documentation, which makes with web components hard for the next developer to change.

Key Takeaways

• with Web Components is a core part of working effectively with design systems.
• Start small and keep with web components focused on a single responsibility.
• Apply consistent patterns so with web components scales across your project.
• Test and document with web components to keep it maintainable over time.