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Sveltejs Academy · Lesson

The Builder Pattern for Headless UI

Expose attribute and event getter functions for fully accessible, unstyled components.

Headless UI

Headless components ship logic and accessibility without styling, letting consumers fully customize.

Builder Pattern

Expose attribute and event-getter functions that consumers spread onto their own elements.

function createToggle() {
  let pressed = $state(false);
  return {
    get pressed() { return pressed; },
    triggerAttrs: () => ({ "aria-pressed": pressed, onclick: () => pressed = !pressed })
  };
}

All lessons in this course

  1. Render Props with Snippets
  2. Higher-Order Components
  3. The Builder Pattern for Headless UI
  4. Compound Components with Context
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