Search results for "JavaScript"

Found 23 results

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The programming language of the web, enabling interactive and dynamic content.

Topics

JavaScript in HTML

Async JavaScript

Lessons

Form Validation Attributes

HTML → HTML Forms

Form Validation Attributes HTML5 added built-in validation that the browser handles automatically — no JavaScript required. Va...

The Button Element

HTML → HTML Forms

HTML Buttons Buttons trigger actions. There are two ways to create them: the <button> element and <input type...

HTML → HTML Media

HTML Canvas The <canvas> element is a blank drawing area. You draw on it using JavaScript. It is used for games, data ...

HTML → HTML Media

HTML SVG SVG (Scalable Vector Graphics) is an XML-based format for vector images. Unlike Canvas, SVG elements are part of the DOM and can...

Custom List Counters

HTML → HTML Lists

Custom List CountersCSS counters let you create fully custom numbering schemes without JavaScript. You define a counter with counter...

Time, Mark, and Details

HTML → HTML Semantic

Time, Mark, and DetailsHTML5 introduced several small but powerful inline and block-level semantic elements. The <time>...

The HTML Head Element

HTML → HTML Head & Meta

The HTML Head ElementThe <head> element is a container for metadata — information about the document that is not disp...

HTML → CSS in HTML

Inline StylesInline styles apply CSS directly to an HTML element via the style attribute. They override external and internal...

The HTML Script Tag

HTML → JavaScript in HTML

The Script TagThe <script> tag embeds or links JavaScript in HTML. Without any attributes it blocks HTML parsing while ...

External JavaScript Files

HTML → JavaScript in HTML

External JS FilesExternal JavaScript files are linked with <script src="file.js"></script>. The browser caches th...

Inline JavaScript

HTML → JavaScript in HTML

Inline JavaScriptJavaScript written directly inside <script> tags is called inline JavaScript. It is parsed and run imm...

The noscript Element

HTML → JavaScript in HTML

The noscript ElementThe <noscript> element provides fallback content displayed when JavaScript is disabled in the brows...

HTML Event Attributes

HTML → JavaScript in HTML

HTML Event AttributesHTML elements support inline event attributes like onclick, onchange, and onsubmit...

HTML Data Attributes

HTML → JavaScript in HTML

Data AttributesData attributes (data-*) store custom data in HTML elements. JavaScript reads them via dataset pr...

Basic DOM Manipulation

HTML → JavaScript in HTML

DOM ManipulationJavaScript can read and modify HTML through the Document Object Model (DOM). Use querySelector, textCon...

JavaScript Loading Order

HTML → JavaScript in HTML

Script Loading OrderDOMContentLoaded fires when HTML is fully parsed. window.onload fires after all resources (i...

JavaScript Performance in HTML

HTML → JavaScript in HTML

JS Performance TipsMinimize JavaScript bundle size, avoid long-running synchronous code on the main thread, and defer non-critical scripts...

The srcset and sizes Attributes

HTML → Responsive Design

srcset and sizessrcset lists available image widths. sizes tells the browser how wide the image will display. Th...

Introduction to HTML iframes

HTML → HTML Iframes

HTML iframesThe <iframe> element embeds another HTML page inside the current page. It creates an isolated browsing cont...

Same-Origin Policy and iframes

HTML → HTML Iframes

Same-Origin PolicyJavaScript cannot access the DOM or properties of an iframe from a different origin due to the same-origin policy. Two U...