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CSS-in-JS is a styling technique by which JavaScript is used to style components. When this JavaScript is parsed, CSS is generated (usually as a <style> element) and attached into the DOM . It enables the abstraction of CSS to the component level itself, using JavaScript to describe styles in a declarative and maintainable way.
htmx (also stylized as HTMX) is an open-source front-end JavaScript library that extends HTML with custom attributes that enable the use of AJAX directly in HTML and with a hypermedia-driven approach. These attributes allow for the dynamic definition of a web page directly in HTML and CSS, without the need for writing additional JavaScript ...
Valid values include |lang=wikitext for wikitext, |lang=html for HTML, along with many other languages including php, perl, css, javascript, mysql. Attempting to use an invalid value for lang will cause the page to be added to Category:Pages with syntax highlighting errors, and no syntax highlighting will be present in the output.
These are typically built into browsers, in their DevTools window. Debuggers allow you to step debug (go through your JavaScript code line-by-line, hover over variables to see their values, etc.) Firefox - use Tools → JavaScript Console showing all JavaScript and CSS errors. Chrome and Edge - use Tools → Developer Tools.
The HTML code provides a "target" to insert generated contents into. Provide a template named "president-template". Last is a function grasping the JSON data, and for each president's subitem, grasping one template and filling it to finally select the HTML page's target appending the whole to it.
Dynamic HTML, or DHTML, is a term which was used by some browser vendors to describe the combination of HTML, style sheets and client-side scripts (JavaScript, VBScript, or any other supported scripts) that enabled the creation of interactive and animated documents.
This script and CSS makes the sidebar stay in the same position on the screen as you scroll. This may have undesirable side effects in Chrome; e.g., when viewing a page like the very common.css page you just edited to put this code in, the viewable content will become much shorter, and require vertical scrolling in a frame.
It introduced the getElementById function as well as an event model and support for XML namespaces and CSS. DOM Level 3, published in April 2004, added support for XPath and keyboard event handling, as well as an interface for serializing documents as XML. HTML5 was published in October 2014. Part of HTML5 had replaced DOM Level 2 HTML module.