{"id":24418,"date":"2024-02-13T23:36:13","date_gmt":"2024-02-13T22:36:13","guid":{"rendered":"https:\/\/nelkodev.com\/blog\/componentes-con-litelement-la-evolucion-de-los-web-components\/"},"modified":"2024-06-03T18:44:17","modified_gmt":"2024-06-03T17:44:17","slug":"componentes-con-litelement-la-evolucion-de-los-web-components","status":"publish","type":"post","link":"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/","title":{"rendered":"Components with LitElement: The evolution of Web Components"},"content":{"rendered":"<p>In contemporary web development, code composition and reuse are fundamental practices for building robust and maintainable applications. The <em>Web Components<\/em> They emerge as a standard solution for creating reusable custom elements through technologies that the web browser understands natively. In this context, <strong>LiteElement<\/strong> It stands out as a lightweight and efficient library for creating modern web components, taking full advantage of the current capabilities of JavaScript and the DOM (Document Object Model).<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #ffffff;color:#ffffff\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #ffffff;color:#ffffff\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#%C2%BFQue_es_LitElement\" >What is LitElement?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#Caracteristicas_principales_de_LitElement\" >LitElement Key Features<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#Comenzando_con_LitElement\" >Getting started with LitElement<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#Fundamentos_de_los_Web_Components\" >Fundamentals of Web Components<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#Instalacion_de_LitElement\" >Installing LitElement<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#Creando_tu_primer_componente_con_LitElement\" >Creating your first component with LitElement<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#Estructura_basica_de_un_componente_LitElement\" >Basic structure of a LitElement component<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#Paso_a_Paso_Construyendo_un_Web_Component_con_LitElement\" >Step by Step: Building a Web Component with LitElement<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#1_Importar_LitElement_y_html\" >1. Import LitElement and html<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#2_Definir_la_clase_del_componente\" >2. Define the component class<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#3_Implementar_el_metodo_render\" >3. Implement the render() method<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#4_Registrar_el_componente\" >4. Register the component<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#Estilizando_componentes_con_LitElement\" >Styling components with LitElement<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#Buenas_practicas_al_trabajar_con_LitElement\" >Good practices when working with LitElement<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#Uso_de_propiedades_y_atributos\" >Using properties and attributes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#Manejo_del_estado_del_componente\" >Managing component status<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#Eventos\" >Events<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#Slots_y_composicion_de_contenido\" >Slots and content composition<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/nelkodev.com\/en\/blog\/components-with-litelement-the-evolution-of-web-components\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"%C2%BFQue_es_LitElement\"><\/span>What is LitElement?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>LitElement is a JavaScript library developed and maintained by Google&#039;s Polymer Project team. It allows developers to build web components with simplified syntax and optimized performance. LitElement acts as a thin abstraction layer on top of the native Web Components API, providing additional tools for state management and declarative UI rendering.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Caracteristicas_principales_de_LitElement\"><\/span>LitElement Key Features<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\n<p><strong>Declarative Interface<\/strong>: LitElement uses <code>lit-html<\/code>, a library for writing HTML templates with JavaScript, allowing easy data binding and event handling.<\/p>\n<\/li>\n<li>\n<p><strong>Reactivity<\/strong>: It is designed around a reactive system that automatically updates the DOM when the component state changes.<\/p>\n<\/li>\n<li>\n<p><strong>Efficiency<\/strong>: Uses a technique called &quot;part refresh&quot;, which only updates dynamic parts of the DOM, rather than performing a complete re-render.<\/p>\n<\/li>\n<li>\n<p><strong>Standard and Modern<\/strong>: It is based on standard web platform capabilities, which means fewer dependencies and greater compatibility across different browsers.<\/p>\n<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Comenzando_con_LitElement\"><\/span>Getting started with LitElement<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Before we dive into how to build a component with LitElement, it&#039;s important to understand the basics of Web Components and how LitElement facilitates this process.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Fundamentos_de_los_Web_Components\"><\/span>Fundamentals of Web Components<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Web components consist of three main technologies:<\/p>\n<ol>\n<li><strong>Custom Elements<\/strong>: Defines new custom HTML elements.<\/li>\n<li><strong>Shadow DOM<\/strong>: Encapsulates CSS and markup so that they are not affected or affect other elements on the page.<\/li>\n<li><strong>HTML Templates<\/strong>: Tags <code>&lt;template&gt;<\/code> y <code>&lt;slot&gt;<\/code> which define default unrendered markup blocks that can be reused.<\/li>\n<\/ol>\n<h3><span class=\"ez-toc-section\" id=\"Instalacion_de_LitElement\"><\/span>Installing LitElement<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>To start working with LitElement you need to have installed <strong>Node.js<\/strong> y <strong>npm<\/strong> in your development environment. Once installed, you can add LitElement to your project with the following npm command:<\/p>\n<pre><code class=\"&quot;language-sh&quot;\">npm install lit-element<\/code><\/pre>\n<h2><span class=\"ez-toc-section\" id=\"Creando_tu_primer_componente_con_LitElement\"><\/span>Creating your first component with LitElement<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Estructura_basica_de_un_componente_LitElement\"><\/span>Basic structure of a LitElement component<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A typical LitElement component will include at least:<\/p>\n<ul>\n<li>An import of the necessary modules from <code>lit-element<\/code>.<\/li>\n<li>A JavaScript class that extends <code>LiteElement<\/code>.<\/li>\n<li>A method <code>render()<\/code> which returns a template <code>lit-html<\/code>.<\/li>\n<li>The definition of the custom element with <code>customElements.define()<\/code>.<\/li>\n<\/ul>\n<pre><code class=\"&quot;language-javascript&quot;\">import { LitElement, html } from &amp;#039;lit-element&amp;#039;; class MyComponent extends LitElement { render(){ return html`\n      &lt;p&gt;Hello, this is my first component with LitElement!&lt;\/p&gt;\n    `; } } customElements.define(&amp;#039;my-component&amp;#039;, MyComponent);<\/code><\/pre>\n<h3><span class=\"ez-toc-section\" id=\"Paso_a_Paso_Construyendo_un_Web_Component_con_LitElement\"><\/span>Step by Step: Building a Web Component with LitElement<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"1_Importar_LitElement_y_html\"><\/span>1. Import LitElement and <code>html<\/code><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Start importing <code>LiteElement<\/code> and the module <code>html<\/code> of the package <code>lit-element<\/code>.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"2_Definir_la_clase_del_componente\"><\/span>2. Define the component class<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Create a class extending <code>LiteElement<\/code> and defines the component logic within it.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"3_Implementar_el_metodo_render\"><\/span>3. Implement the method <code>render()<\/code><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>The method <code>render<\/code> is responsible for returning the UI representation of the component using the function <code>html<\/code>.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"4_Registrar_el_componente\"><\/span>4. Register the component<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Use the method <code>customElements.define<\/code> to register your new custom item with a unique tag name. This allows you to then use the component like any other HTML element in your application.<\/p>\n<pre><code class=\"&quot;language-javascript&quot;\">import { LitElement, html } from &#039;lit-element&#039;; class MyButton extends LitElement { render(){ return html` <button>Click me!<\/button> `; } _onClick() { console.log(&#039;The button was clicked&#039;); } } customElements.define(&#039;my-button&#039;, MyButton);<\/code><\/pre>\n<h3><span class=\"ez-toc-section\" id=\"Estilizando_componentes_con_LitElement\"><\/span>Styling components with LitElement<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>With LitElement, you can define internal CSS styles using the static property <code>styles<\/code> or in the method <code>render()<\/code> using the function <code>css<\/code>.<\/p>\n<pre><code class=\"&quot;language-javascript&quot;\">import { LitElement, html, css } from &#039;lit-element&#039;; class MyButton extends LitElement { static get styles() { return css` button { background-color: blue; colour: white; padding: 10px 20px; border:none; border-radius: 5px; cursor: pointer; } `; } render(){ return html` <button>Click me!<\/button> `; } \/\/ ... }<\/code><\/pre>\n<h2><span class=\"ez-toc-section\" id=\"Buenas_practicas_al_trabajar_con_LitElement\"><\/span>Good practices when working with LitElement<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Uso_de_propiedades_y_atributos\"><\/span>Using properties and attributes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>LitElement manages component properties efficiently and allows you to reflect those properties as attributes in the HTML, which is useful for passing data between components.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Manejo_del_estado_del_componente\"><\/span>Managing component status<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>You should keep the component state as simple as possible and use the method <code>this.requestUpdate()<\/code> to notify LitElement that the state has changed and the component needs to be rendered again.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Eventos\"><\/span>Events<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>LitElement facilitates communication between components using custom events that can be emitted via <code>this.dispatchEvent(new CustomEvent(...))<\/code>.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Slots_y_composicion_de_contenido\"><\/span>Slots and content composition<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Use slots to create dynamic content compositions within your web components, which will allow you greater flexibility and reuse of them.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>LitElement offers a modern, elegant and powerful solution for working with Web Components, combining the best of web standards with a convenient and productive API. By using these practices and features, developers can build highly functional and reusable components that integrate seamlessly into any modern web application, making the development experience more efficient and enjoyable.<\/p>\n<p>JavaScript continues to evolve, and tools like LitElement remain at the forefront of web development, proving that web standards have enormous potential for creating rich, interactive applications. With LitElement, you are empowered to bring your ideas to life with well-designed, efficient and easy-to-maintain web components, which will make the difference in high-quality web development.<\/p>","protected":false},"excerpt":{"rendered":"<p>En el desarrollo web contempor\u00e1neo, la composici\u00f3n y reutilizaci\u00f3n de c\u00f3digo son pr\u00e1cticas fundamentales para construir aplicaciones robustas y mantenibles. Los Web Components surgen como una soluci\u00f3n est\u00e1ndar para crear elementos personalizados reutilizables a trav\u00e9s de tecnolog\u00edas que el navegador web comprende nativamente. En este contexto, LitElement se destaca como una biblioteca liviana y eficiente [&hellip;]<\/p>","protected":false},"author":1,"featured_media":24050,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[420,2207,1127],"tags":[205,669,886,90,1314,922,221,2208,47,742],"class_list":["post-24418","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-nodejs","category-webcomponents","tag-blog","tag-componentes","tag-components","tag-con","tag-evolucion","tag-litelement","tag-los","tag-nodejs","tag-web","tag-webcomponents"],"_links":{"self":[{"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/posts\/24418","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/comments?post=24418"}],"version-history":[{"count":0,"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/posts\/24418\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/media\/24050"}],"wp:attachment":[{"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/media?parent=24418"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/categories?post=24418"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/tags?post=24418"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}