add examples for event handling in web components

Sascha Schulz

2024-03-18 2c684af29f61555fce48e67993a865e4ba091698

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class CardComponent extends HTMLElement { 
    constructor() { 
        super(); 
 
        const shadowRoot = this.attachShadow({mode: "open"}); 
 
        shadowRoot.innerHTML = ` 
            <!-- style --> 
             
            <!-- html -->     
        `; 
    } 
} 
 
window.customElements.define("card-component", CardComponent);