All files / src/custom-element/mixins/core ShadowRootMixin.ts

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/**
 * Mixin to manage whether the custom component has a shadow root or not
 * @param Base 
 * @returns 
 */
const ShadowRootMixin = Base =>
 
    class ShadowRoot extends Base {
 
        constructor() {
 
            super();
 
            if ((this.constructor as any).metadata.shadow === true) {
 
                this.attachShadow({ mode: 'open' });
            }
        }
 
        /** 
         * The DOM document in which this component is updated 
         */
        get document() {
 
            return this.shadowRoot !== null ?
                this.shadowRoot :
                this;
        }
 
    }
 
export default ShadowRootMixin;