Tree Shaking

Tree Shaking Overview

Tree Shaking is a building block you will reach for often in design systems. It keeps related logic together and makes your intent obvious to reviewers and future maintainers.

When you learn tree shaking properly, you avoid the guesswork that leads to bugs and rework. The example below shows the shape you will use in most real design systems projects.

<ds-card>
  <h3 slot="title">Plan</h3>
  <p slot="body">Everything your team needs.</p>
  <ds-button slot="actions" variant="primary">Choose</ds-button>
</ds-card>

Slot-based composition lets consumers place content while the component controls structure and style.

Tree Shaking Example

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

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

Design System Cheatsheet

Quick reference for tree shaking within a modern design system.

How Tree Shaking Fits into a Design System

Tree Shaking 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.

Slot-based composition lets consumers place content while the component controls structure and style.

• 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 Tree Shaking

Adoption is where design systems succeed or stall. Make tree shaking 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 tree shaking.
• Leaving tree shaking untested, so regressions slip into production.
• Over-engineering tree shaking before you actually need the extra flexibility.
• Ignoring documentation, which makes tree shaking hard for the next developer to change.

Key Takeaways

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