In regards of slots, they are a nice way to allow a user of you webcomponent to overwrite/replace parts of your component with something else. This is most of the time a more advanced feature and I find it quite nice to build headless components

That's exactly what I'm saying is bad. Why does the user of the howto-tabs have to type "slot='panel'" when that information is already communicated by the fact that it's a "howto-panel" inside a "howto-tabs"? This is a useless leaking of implementation details.

And that page just keeps going and going. Sure, some of that is because they're implementing a few neat features, but most of it is because slots are way overcomplicated for something that's actually easier to do without them.

   class HnTabs extends HTMLElement {
       constructor() {
           super();
           this._tabs = {}
           this.attachShadow({ mode: 'open' })
           const ul = document.createElement('ul')
           this.shadowRoot.appendChild(ul)
           const slot = document.createElement('slot')         
           this.shadowRoot.appendChild(slot)
           slot.addEventListener('slotchange', () => {
             ul.innerHTML = ''
             const tabs = Array.from(this.querySelectorAll('hn-
             if (!tabs.some((tab) => tab.hasAttribute('active')
               tabs[0].setAttribute('active', '')
             }
             tabs.forEach((tab) => {
               const li = document.createElement('li')
               li.innerText = tab.getAttribute('text')
               ul.appendChild(li)
               li.addEventListener('click', (e) => {
                 tabs.forEach((t) => t.removeAttribute('active'
                 tab.setAttribute('active', '')
               })
             })
           })
       }
   }
   customElements.define('hn-tabs', HnTabs);
   
   class HnTab extends HTMLElement {
       static get observedAttributes() {
         return ['active'];
       }
       constructor() {
           super()
           this.attachShadow({ mode: 'open' });
           this._slot = document.createElement('slot')         
           this.shadowRoot.appendChild(this._slot)
           this._slot.style.display = 'none'
           console.log(this.slot)
       }
       attributeChangedCallback() {
         this.#activeStatus()
       }
       connectedCallback() {
         this.#activeStatus()
       }
       #activeStatus(){
         const active = this.hasAttribute('active');
         this._slot.style.display = active ? 'block' : 'none'
       }
   }
   customElements.define('hn-tab', HnTab);