JavaScript DOM for Beginners Learn how to code

Explore three practical JavaScript projects from scratch: a character counter with live remaining count, a hover-pause content scroller, and draggable, cloneable divs using DOM events.

Set up a text area and an output area, connect them with JavaScript via querySelector, and add an event listener to count characters as you type.

Learn to attach multiple event listeners to a text element using an array and a for-each loop. Handle key up, key down, and change events to trigger a text counter.

Type in the text area to trigger the text counter and enforce a max length of ten with substring. Learn about a five-character warning and overwriting input to limit content.

Extend the previous lesson by adding a character warning with a max length of 20, showing remaining characters and turning the output red when seven remain using classList.

Set up a text scroller in the DOM by creating a container, button, and speed input, then access elements and attach a click event.

Learn to implement a scrolling content area in the JavaScript DOM course by initializing on load, calculating bounding rectangles, adjusting height and top, and driving the scroll with an interval.

Learn to implement a looping scroll by updating an element's style.top with a set scroll speed, using parseInt for position, and resetting at the client height.

Learn to stop and resume scrolling on mouse enter and mouse leave by using a global scroller variable and updating output with a live stopper message.

Learn to control DOM scrolling by toggling with a button, stopping on mouse over, and adjusting speed via a speed input, using a bitwise xor assignment operator to flip booleans.

Watch a practical scroller code review that demonstrates setting up the container, applying styling and absolute positioning, and using an input to control scroll speed with a start/stop button.

Practice selecting and manipulating dom elements with the class copy me, loop with forEach, attach click listeners, use element indices, and prepare to clone elements.

Learn to clone DOM elements with cloneNode and customize cloned copies by updating style, position, and classes. Append them to the body and manage them with a holder object.

Animate cloned elements by giving each a random move count up to 25 and running a 25 ms interval that updates start positions and the left and top styles.

Draggable elements are created with a dragger function that tracks mouse down, move, and up to update element position using clientX, clientY, offsetTop, and offsetLeft.

Call the random color function to generate hex color values from 0 to 255, convert to two-character hex strings, update element colors, and pad with a leading zero using substring.

Learn to create a trash bin to delete dynamically created elements by dragging them over a black square, using collision detection with bounding rectangles to detect overlap.

Remove elements by dragging them to a trash bin, detecting collision on top, then traverse to the parent and delete the matching child, causing the dragged element to disappear.

Review how dom elements duplicate html content, update styling, and animate with elements and placeholder images. Drag, move, collide, and remove elements using dom methods and get bounding client rectangle.

Build a JavaScript DOM game from scratch that guesses a lock combo with dynamic elements and start and unlock buttons. Provide color feedback, track guesses, and restart after success.

Select a string from an input, pass it to a function, and display the total length, vowel count, and other characters using string and array methods on the page.

Select a string from input and pass it to a function to update length and vowel count. Count vowels with a regex, list them, and show results on button click.

Fetch data from the Star Wars API with a button click, select films, people, or planets from a dropdown, and display the JSON results on the page and in console.

Apply a pure JavaScript fade, feed in and feed out to elements with the feeder class, toggling opacity via transitions and dynamically creating elements and buttons.

Demonstrates a JavaScript closure via an outer function returning an inner function, starting values like 10 or 15, incrementing with two, and outputting via console and DOM.

Explore higher order functions in JavaScript, using map, filter, and reduce to process arrays and create dynamic, flexible code, including functions that return other functions.