@surface/custom-element/internal/metadata/prototype-metadata.js

Provides support of directives and data binding on custom elements.

export const PROTOTYPE_METADATA = Symbol("custom-element:prototype-metadata");
export default class PrototypeMetadata {
    static from(target) {
        if (!target.hasOwnProperty(PROTOTYPE_METADATA)) {
            Reflect.defineProperty(target, PROTOTYPE_METADATA, { configurable: false, enumerable: false, value: new PrototypeMetadata() });
        }
        return Reflect.get(target, PROTOTYPE_METADATA);
    }
    inherit() {
        return new PrototypeMetadata();
    }
}