design-api

To design a custom element API, outline the tag name, attributes, properties, slots, events, and CSS custom properties. This ensures a predictable API surface across components and design systems by enforcing consistent naming conventions, types, and documentation structure.

Custom element attributes and properties require consistent naming, defined types, and defaults, along with explicit reflection rules. Aligning these with existing elements ensures interoperability and a coherent public API surface across your design system.

Planning CSS custom properties and slots involves specifying them explicitly to enable theming and content projection. Defining CSS parts and variables alongside slots ensures the custom element integrates predictably into broader design systems.

Yes, you can audit a family of existing web components for API consistency. The process evaluates tag naming, events, and CSS custom properties against established guidelines to generate a complete API design summary for alignment.

You need to define a custom element API surface when planning a new component for a design system or extending existing elements. It solves the challenge of maintaining interoperability and predictable behavior across teams.

The best way to document events and CSS parts is to generate a complete API design summary. This satisfies guidelines for documentation structure by specifying events, slots, CSS parts, and custom properties aligned with existing elements.