{"id":22944,"date":"2024-04-04T05:21:45","date_gmt":"2024-04-04T04:21:45","guid":{"rendered":"https:\/\/nelkodev.com\/blog\/shadow-dom-una-introduccion-a-los-webcomponents\/"},"modified":"2024-06-03T17:30:19","modified_gmt":"2024-06-03T16:30:19","slug":"shadow-dom-una-introduccion-a-los-webcomponents","status":"publish","type":"post","link":"https:\/\/nelkodev.com\/en\/blog\/shadow-dom-an-introduction-to-webcomponents\/","title":{"rendered":"Shadow DOM: an introduction to WebComponents"},"content":{"rendered":"<p>WebComponents are a revolutionary technology in building web applications. By using reusable components, developers can create more modular and maintainable user interfaces. One of the key concepts of WebComponents is the Shadow DOM. In this article, we will explore what the Shadow DOM is and how it is used in building web components. Additionally, we will discuss the integration of CSS and JavaScript in WebComponents, as well as their importance in web development. If you are interested in improving your web development skills, read on.<\/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\/shadow-dom-an-introduction-to-webcomponents\/#%C2%BFQue_es_el_Shadow_DOM\" >What is Shadow DOM?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/nelkodev.com\/en\/blog\/shadow-dom-an-introduction-to-webcomponents\/#Integrando_CSS_en_los_WebComponents\" >Integrating CSS into WebComponents<\/a><\/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\/shadow-dom-an-introduction-to-webcomponents\/#JavaScript_en_los_WebComponents\" >JavaScript in WebComponents<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/nelkodev.com\/en\/blog\/shadow-dom-an-introduction-to-webcomponents\/#Conclusion\" >Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/nelkodev.com\/en\/blog\/shadow-dom-an-introduction-to-webcomponents\/#Preguntas_frecuentes\" >Frequently asked questions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/nelkodev.com\/en\/blog\/shadow-dom-an-introduction-to-webcomponents\/#1_%C2%BFCual_es_la_diferencia_entre_Shadow_DOM_y_DOM_tradicional\" >1. What is the difference between Shadow DOM and traditional DOM?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/nelkodev.com\/en\/blog\/shadow-dom-an-introduction-to-webcomponents\/#2_%C2%BFComo_puedo_utilizar_el_Shadow_DOM_en_mi_proyecto\" >2. How can I use the Shadow DOM in my project?<\/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\/shadow-dom-an-introduction-to-webcomponents\/#3_%C2%BFCuales_son_las_ventajas_de_utilizar_WebComponents\" >3. What are the advantages of using WebComponents?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/nelkodev.com\/en\/blog\/shadow-dom-an-introduction-to-webcomponents\/#4_%C2%BFHay_algun_navegador_que_no_sea_compatible_con_WebComponents\" >4. Are there any browsers that do not support WebComponents?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/nelkodev.com\/en\/blog\/shadow-dom-an-introduction-to-webcomponents\/#5_%C2%BFDebo_aprender_JavaScript_para_utilizar_WebComponents\" >5. Do I need to learn JavaScript to use WebComponents?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/nelkodev.com\/en\/blog\/shadow-dom-an-introduction-to-webcomponents\/#6_%C2%BFDonde_puedo_obtener_mas_informacion_sobre_WebComponents\" >6. Where can I get more information about WebComponents?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"%C2%BFQue_es_el_Shadow_DOM\"><\/span>What is Shadow DOM?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The Shadow DOM is a feature of WebComponents that allows you to encapsulate the element and style tree of a web component. This means that a component&#039;s internal styles and elements are not accessible from the external context. The Shadow DOM creates a local scope for styles and elements, which avoids conflicts with other styles and elements on the page.<\/p>\n<p>To use the Shadow DOM, you must create a host element that will contain the component and apply it using the method <code>attachShadow()<\/code>. Within the Shadow DOM, specific elements and styles can be added to the component, ensuring its encapsulation and reusability.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Integrando_CSS_en_los_WebComponents\"><\/span>Integrating CSS into WebComponents<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Integrating CSS into WebComponents is easy thanks to the Shadow DOM. Within the Shadow DOM, you can include a styles section where component-specific style rules are defined. These styles will only be applied to the internal elements of the component and will not affect the rest of the page. This is especially useful when using external libraries or frameworks that have their own styles, avoiding collisions and maintaining the visual consistency of the component.<\/p>\n<p>In addition to the local definition of styles, it is also possible to apply global styles using the attribute <code>::slotted()<\/code>. This attribute allows you to select and style the elements projected on the component. This way, you can apply consistent styling to external elements and maintain visual consistency across the component.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"JavaScript_en_los_WebComponents\"><\/span>JavaScript in WebComponents<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The use of JavaScript is essential in the development of WebComponents. Allows you to control the behavior and logic of the component. Within the Shadow DOM, script tags can be included where the JavaScript code necessary for the component to function is defined. As with styles, this JavaScript code is only visible and accessible within the component, ensuring its encapsulation and avoiding conflicts with other scripts on the page.<\/p>\n<p>An interesting feature of the Shadow DOM is the ability to emit custom events from the component to the outside. Custom events enable flexible communication between components and can be used to notify changes, trigger actions, or convey relevant information. Using custom events makes it easy to create highly reusable and customizable components.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>In short, the Shadow DOM is a fundamental feature of WebComponents that allows the encapsulation of styles and elements in a web component. Thanks to the Shadow DOM, the styles and scripts applied to the component do not affect the rest of the page. This ensures greater modularity and reusability of components, facilitating the development of more robust and maintainable web applications.<\/p>\n<p>If you are interested in learning more about WebComponents and improving your web development skills, we invite you to visit our website at <a href=\"https:\/\/nelkodev.com\/en\/\">https:\/\/nelkodev.com<\/a>. We are committed to providing quality, educational content for developers of all levels.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Preguntas_frecuentes\"><\/span>Frequently asked questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1_%C2%BFCual_es_la_diferencia_entre_Shadow_DOM_y_DOM_tradicional\"><\/span>1. What is the difference between Shadow DOM and traditional DOM?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The main difference between Shadow DOM and traditional DOM is encapsulation. The Shadow DOM allows the styles and elements of a web component to be encapsulated, avoiding conflicts with other styles and elements on the page. The traditional DOM, on the other hand, does not offer this encapsulation and all styles and elements are accessible and can affect the entire document.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_%C2%BFComo_puedo_utilizar_el_Shadow_DOM_en_mi_proyecto\"><\/span>2. How can I use the Shadow DOM in my project?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>To use the Shadow DOM in your project, you must create a host element that will contain the component and then apply the Shadow DOM using the method <code>attachShadow()<\/code>. You can then add elements and styles to the Shadow DOM to encapsulate the component&#039;s styles and elements.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_%C2%BFCuales_son_las_ventajas_de_utilizar_WebComponents\"><\/span>3. What are the advantages of using WebComponents?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The advantages of using WebComponents include the modularity and reusability of components, making it easier to develop and maintain web applications. Additionally, WebComponents offer encapsulation of styles and elements through the Shadow DOM, avoiding conflicts with other styles and elements on the page.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_%C2%BFHay_algun_navegador_que_no_sea_compatible_con_WebComponents\"><\/span>4. Are there any browsers that do not support WebComponents?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>In general, most modern browsers support WebComponents. However, some older browsers may have partial compatibility issues or require polyfills to make WebComponents work properly.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5_%C2%BFDebo_aprender_JavaScript_para_utilizar_WebComponents\"><\/span>5. Do I need to learn JavaScript to use WebComponents?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>While knowing JavaScript is beneficial when using WebComponents, it is not an essential requirement. It is possible to create web components using only HTML and CSS, although JavaScript provides more advanced control and flexibility in component behavior.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"6_%C2%BFDonde_puedo_obtener_mas_informacion_sobre_WebComponents\"><\/span>6. Where can I get more information about WebComponents?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>If you are looking for more information about WebComponents, we recommend visiting our website at <a href=\"https:\/\/nelkodev.com\/en\/\">https:\/\/nelkodev.com<\/a>. We have a variety of educational resources and tutorials on WebComponents and other topics related to web development.<\/p>","protected":false},"excerpt":{"rendered":"<p>WebComponents are a revolutionary technology in building web applications. By using reusable components, developers can create more modular and maintainable user interfaces. One of the key concepts of WebComponents is the Shadow DOM. In this article, we will explore what the Shadow DOM is and how it is used in building web applications.<\/p>","protected":false},"author":1,"featured_media":22945,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[420,1127],"tags":[205,743,545,221,722,37,742],"class_list":["post-22944","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-webcomponents","tag-blog","tag-dom","tag-introduccion","tag-los","tag-shadow","tag-una","tag-webcomponents"],"_links":{"self":[{"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/posts\/22944","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=22944"}],"version-history":[{"count":0,"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/posts\/22944\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/media\/22945"}],"wp:attachment":[{"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/media?parent=22944"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/categories?post=22944"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/tags?post=22944"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}