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Elemento de navegación activo con elementos html personalizados

Estoy construyendo un componente de navegación usando elementos personalizados html como este:

HTML

 <app-navbar></app-navbar> <template> <style> ul { display: flex; list-style: none; gap: 20px; } a { padding: 10px; text-decoration: none; } .active { color: white; background-color: red; } </style> <nav> <ul> <li><a href="/page-one.html">Nav item 1</a></li> <li><a href="/page-two.html">Nav item 2</a></li> <li><a href="/page-three.html">Nav item 3</a></li> </ul> </nav>

JS

 class AppNavBar extends HTMLElement { constructor() { super(); this.attachShadow({ mode: 'open' }); const template = document.querySelector('template'); this.shadowRoot.appendChild(template.content.cloneNode(true)) } } window.customElements.define("app-navbar", AppNavBar)

Y ahora necesito pasar la clase activa al elemento de navegación respectivo. Por ejemplo, al hacer clic en el <a href="/page-two.html">Nav item 2</a> , quiero que ese elemento tenga la clase .active, etc.

Actualizar

Algo como:

página-uno.html

<app-navbar page-one-nav-item="active"></app-navbar>

página-dos.html

<app-navbar page-two-nav-item="active"></app-navbar>

página-tres.html

<app-navbar page-three-nav-item="active"></app-navbar>

¿Es posible lograr esto con elementos personalizados html?

Gracias.

about 4 years ago · Juan Pablo Isaza
1 answers
Answer question

0

Si desea hacerlo con un componente web, envuelva el <a> en un componente web:

<nav-a href="/page-one.html">Nav item 1</nav-a>

 console.log(location); customElements.define("nav-a", class extends HTMLElement { connectedCallback() { setTimeout(() => { // make sure innerHTML is parsed let href = this.getAttribute("href"); let klass = (location.href.includes(href)) ? "active" : ""; this.innerHTML = `<a class="${klass}" href="${href}">${this.innerHTML}</a>`; }); } });
about 4 years ago · Juan Pablo Isaza Report
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