calebdwilliams/element-internals-po...

This polyfill enables custom elements to use the ElementInternals API for form participation and accessibility features, primarily allowing custom form controls to integrate with HTML forms like native inputs. It's designed for web developers building custom elements who need form validation, state management, and accessibility support in browsers that don't yet implement the ElementInternals standard. The package provides form-associated custom elements, accessibility controls via ARIA attributes, and custom state APIs, making it essential for creating accessible, form-ready web components.