{"id":33611,"date":"2022-04-28T08:44:29","date_gmt":"2022-04-28T08:44:29","guid":{"rendered":"https:\/\/www.arimetrics.com\/glosario-digital\/dhtml"},"modified":"2026-09-20T10:06:03","modified_gmt":"2026-09-20T10:06:03","slug":"dhtml","status":"publish","type":"encyclopedia","link":"https:\/\/www.arimetrics.com\/en\/digital-glossary\/dhtml","title":{"rendered":"DHTML"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/www.arimetrics.com\/wp-content\/uploads\/2026\/09\/dhtml-square.png\" alt=\"DHTML\" class=\"boxpad wp-image-80002 size-full alignright\" style=\"margin-top:0;\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.arimetrics.com\/wp-content\/uploads\/2026\/09\/dhtml-square.png 300w, https:\/\/www.arimetrics.com\/wp-content\/uploads\/2026\/09\/dhtml-square-150x150.png 150w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><strong>Definition:<\/strong><\/p>\n<p><strong>DHTML<\/strong>, short for <em>Dynamic HTML<\/em>, is a historical term describing the combined use of HTML, CSS, the Document Object Model and a programming language, usually JavaScript, to modify a page in the browser after its initial load.<\/p>\n<p><strong>DHTML is not a separate language, library or standard.<\/strong> The term became popular in the late 1990s as an umbrella for techniques now described as DOM manipulation, client-side scripting or dynamic web-interface development.<\/p>\n\n<h2>How DHTML works<\/h2>\n<p>When a browser interprets an HTML document, it builds a representation of its elements called the DOM. JavaScript can respond to events and use this representation to add, remove or modify content, attributes and styles.<\/p>\n<p>The historical combination called DHTML includes:<\/p>\n<ul>\n<li><strong><a href=\"https:\/\/www.arimetrics.com\/en\/digital-glossary\/html\">HTML<\/a>:<\/strong> Defines the structure and meaning of the content.<\/li>\n<li><strong><a href=\"https:\/\/www.arimetrics.com\/en\/digital-glossary\/css\">CSS<\/a>:<\/strong> Controls presentation and supports changes to visual styles and states.<\/li>\n<li><strong><a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/API\/Document_Object_Model\" target=\"_blank\" rel=\"noopener\">DOM<\/a>:<\/strong> Represents the document through objects and nodes that can be queried and modified.<\/li>\n<li><strong><a href=\"https:\/\/www.arimetrics.com\/en\/digital-glossary\/javascript\">JavaScript<\/a>:<\/strong> Handles events, applies logic and performs changes to the document.<\/li>\n<\/ul>\n<p>Local DOM changes do not require the entire page to be reloaded. When the interface needs new data from a server, it also requires a communication mechanism such as AJAX or <code>fetch<\/code>; that communication is not by itself part of DHTML.<\/p>\n<p>Early implementations depended on different browser-specific models and functions. <strong>The standardisation of the DOM, CSS and web APIs reduced these incompatibilities<\/strong>, while the term DHTML gradually fell out of use.<\/p>\n<h2>DHTML applications<\/h2>\n<p>The techniques grouped under DHTML supported behaviours that are now common:<\/p>\n<ul>\n<li>Showing, hiding or expanding content.<\/li>\n<li>Creating menus, tabs, modal windows and interactive controls.<\/li>\n<li>Validating fields and displaying messages while a form is completed.<\/li>\n<li>Changing styles, positions or dimensions in response to an action.<\/li>\n<li>Updating part of an interface when combined with <a href=\"https:\/\/www.arimetrics.com\/en\/digital-glossary\/ajax\">AJAX<\/a>.<\/li>\n<\/ul>\n<p><strong>Interactivity does not guarantee a good user experience.<\/strong> Controls need semantic structure, keyboard support, correct focus management and changes that can be communicated to assistive technologies.<\/p>\n<h2>DHTML relevance<\/h2>\n<p>DHTML became prominent as browsers gained scripting and style-sheet capabilities. The <a href=\"https:\/\/www.w3.org\/DOM\/faq.html\" target=\"_blank\" rel=\"noopener\">W3C<\/a> described it as a marketing term applied to a mixture of HTML, styles, the DOM and scripts, without a specification formally defining DHTML.<\/p>\n<p>The underlying technologies remain fundamental, but the name is now mainly a historical reference. Modern development uses more precise expressions such as <strong>DOM manipulation, client-side JavaScript, browser rendering or interactive web interface<\/strong>.<\/p>\n<p>DHTML remains useful for understanding the transition from static documents to pages that respond to events and alter their presentation during use.<\/p>\n<h2>DHTML scope<\/h2>\n<p>DHTML can be distinguished from related concepts:<\/p>\n<ul>\n<li><strong>Server-side dynamic page:<\/strong> The server generates a different response according to data, session or request information. It may use technologies such as <a href=\"https:\/\/www.arimetrics.com\/en\/digital-glossary\/php\">PHP<\/a> without subsequently modifying the document in the browser.<\/li>\n<li><strong>AJAX:<\/strong> Exchanges data with a server without reloading the entire page. It may be used to update the DOM but is not required for local changes.<\/li>\n<li><strong>Client-side rendering:<\/strong> Describes modern applications in which JavaScript generates a substantial part of the interface. It may use the same technical foundations but is not an exact historical synonym for DHTML.<\/li>\n<\/ul>\n<p>A page may combine server generation, browser rendering and asynchronous updates. <strong>Its classification depends on where content is built or modified, not on whether the page appears visually dynamic.<\/strong><\/p>\n<p>For SEO, important content and links need to be discoverable, renderable and interpretable. Google processes JavaScript applications through <a href=\"https:\/\/developers.google.com\/search\/docs\/crawling-indexing\/javascript\/javascript-seo-basics\" target=\"_blank\" rel=\"noopener\">crawling, rendering and indexing<\/a> stages, but other tools and crawlers may have different capabilities. Real HTML links, meaningful status codes and efficient loading also remain necessary.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What DHTML is, how it combines HTML, CSS, the DOM and JavaScript, what it was used for and how it differs from AJAX and dynamic pages.<\/p>\n","protected":false},"author":33,"featured_media":80004,"template":"","encyclopedia-tag":[1269],"class_list":["post-33611","encyclopedia","type-encyclopedia","status-publish","has-post-thumbnail","hentry","encyclopedia-tag-html-structure"],"_links":{"self":[{"href":"https:\/\/www.arimetrics.com\/en\/wp-json\/wp\/v2\/encyclopedia\/33611","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.arimetrics.com\/en\/wp-json\/wp\/v2\/encyclopedia"}],"about":[{"href":"https:\/\/www.arimetrics.com\/en\/wp-json\/wp\/v2\/types\/encyclopedia"}],"author":[{"embeddable":true,"href":"https:\/\/www.arimetrics.com\/en\/wp-json\/wp\/v2\/users\/33"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.arimetrics.com\/en\/wp-json\/wp\/v2\/media\/80004"}],"wp:attachment":[{"href":"https:\/\/www.arimetrics.com\/en\/wp-json\/wp\/v2\/media?parent=33611"}],"wp:term":[{"taxonomy":"encyclopedia-tag","embeddable":true,"href":"https:\/\/www.arimetrics.com\/en\/wp-json\/wp\/v2\/encyclopedia-tag?post=33611"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}