JavaScript DOM Example code Interactive Dynamic JavaScript

Explore the document object model and JavaScript to enliven HTML pages. Inspect the DOM with developer tools, then add, remove items, and pass through secret object messages.

Set up your browser and editor to follow along with browser-based JavaScript and HTML element interactions, using Chrome DevTools console, inspect, and Brackets editor for writing and testing code.

Learn how the browser constructs the document object model from page elements, enabling JavaScript to interact with content, inspect the DOM with developer tools, and manipulate elements and events.

Explore dom manipulation by selecting elements with querySelectorAll and querySelector, updating content and styles, and comparing innerHTML and innerText through hands-on examples.

Learn how to select elements in the document object model, using methods like getElementById, by tag name, by class name, and querySelector, and understand node list and applying yellow styles.

Learn to select an element with document.querySelector, examine its textContent, innerText, and innerHTML, and compare outerHTML, which can replace the element and remove the item from the list.

Learn to manipulate a page element's classes with JavaScript by selecting the element, applying, removing, and toggling classes via className or classList to switch red and blue themes.

Select elements by class name, target the first node, and apply inline styles with element.style using properties like color, backgroundColor, fontSize, and display.

Learn to grab and update element attributes in JavaScript by using getAttribute and setAttribute on images and hyperlinks, including swapping image sources and href values.

Learn to make web pages interactive with JavaScript by selecting a list, attaching a click event listener, and updating the background color or logging clicks to the console.

Learn how to select multiple list items with querySelectorAll, iterate with length, attach click listeners, and toggle a red class using this on each item.

selects the input by name, attaches a key press event, logs the item, and triggers actions on enter, including updating the list background and validating input length.

Explore dom mouse events by selecting list items, looping through them, and attaching mouseover and mouseout listeners that toggle a red class to recreate a css hover effect with javascript.

Create dynamic dom elements with javascript by selecting a clicker, handling clicks, creating elements and text nodes, and appending them to an unordered list.

Learn to attach event listeners to all list items, including dynamically created ones, enabling click interactions that apply red styling, text-decoration, and toggle behavior with real-time updates.

Create dynamic elements with event listeners, toggling and removing them in the DOM. Build spans with an X, traverse to the parent, and append new elements on input enter.

Remove the click me button and enable adding items by pressing enter; select input with querySelector, listen for keypress, append input value to the dom list, and clear field.

Learn to attach hidden values to dynamically created DOM elements, retrieve them on user interaction, and reuse object-like properties to enrich on-the-fly interactivity in JavaScript.