Amazing JavaScript Code Examples From Scratch DOM coding

Implement a textarea character limit with JavaScript by counting input, displaying a live character count, and applying styling changes when the 140-character limit is reached.

Learn to manipulate DOM elements with classList and substrings, enforce a 140 character limit with a 100 character warning, and dynamically update textarea content.

Enforce a hard 20-character limit in a textarea by manipulating DOM values and field content. Use getElementById, value properties, and dynamic listeners to manage limits across multiple textareas.

Explore selecting elements with querySelector and adding event listeners like onchange, onkeyup, and onkeydown to a textarea, using addEventListener for clean, functional DOM code.

Learn to open and close a window in JavaScript by calling a function from HTML, using window.open and window.close, with console logs and Bootstrap styling.

Explore the window history API by using history methods such as back and go to navigate pages, inspect history length, and implement navigation with two linked pages.

Use the navigator object to access app name, app version, and user agent, then apply conditional logic to determine the browser and output related code.

Detect browser type by inspecting navigator.userAgent, performing Chrome and Firefox checks, and outputting findings to guide compatibility with mobile and desktop browsers.

Explore how to access the document location in JavaScript, retrieving the URL components like host, path name, and origin, and display them on the page with DOM manipulation.

Learn to read a document’s last-modified date and current date in JavaScript using getTime to compare and classify content as new or old.

Learn how to use the document.location object to reload a page, explore location properties, and apply methods like toString and replace for navigation control.

Style the output div with a 500 px width and 400 px height, then detect when the mouse hovers to display a message and prepare scrolling content with dom listeners.

Learn to implement a scrolling text area with JavaScript and DOM, using an output container, overflow hidden, and absolute positioning, pausing on mouseover and resuming on mouseout.

populate the content area on window load and initialize a scroll function that positions the scrolling region with a set interval to animate content.

Set up the scroller by calculating height with client height and offset height, update the top position using parsed values, and reset to the initial point to avoid infinite scrolling.

Build a dynamic scrolling box with DOM and JavaScript by setting content height, using a conditional restart, applying client height to drive the loop, and hover to pause.