More than 20 DOM Methods Every Developer Should Know

The Document Object Model (DOM) is a crucial aspect of web development, serving as a programming interface for web documents. As a developer, mastering DOM methods is essential for manipulating and interacting with the structure, style, and content of web pages dynamically.

getElementById

The getElementById is a basic method of DOM manipulation. It allows us to select and access a specific HTML element by its unique identifier (id). This method is efficient and widely used for targeted interactions with elements on a page.

getElementsByClassName & getElementsByTagName

getElementsByClassName and getElementsByTagName used to get collection of elements with same class and type respectively.

querySelector & querySelectorAll

The querySelector method allows us to select the first element and querySelectorAll to select all elements that matches a specified CSS selector. It provides a powerful way to access elements with more complex criteria.

elementFromPoint

The elementFromPoint method allows us to retrieve the topmost element at a specified set of coordinates on the page. This is beneficial for scenarios where precise interactions based on user mouse or touch events are required.

createElement

The createElement method is essential for dynamically creating HTML elements in JavaScript. We can then manipulate and append these elements to the DOM as needed. This method is widely used when creating Single Page Applications.

appendChild

This method we used to insert a new child element into an existing parent element at the end. It's commonly used to dynamically add content to a webpage.

after & before methods of Node

The after and before methods of Node, inserts a set of Node objects or DOMString objects immediately after and before the specified child respectively.

replaceChildren

The replaceChildren method simplifies the process of replacing the children of an element with a new set of nodes. This can be particularly useful when updating the content of a container element dynamically and removing all children.

remove & removeChild

The remove method used to remove an element itself and removeChild method used to remove a child by calling it on parent and passing child as parameter.

setAttribute, removeAttribute and hasAttribute

The setAttribute method used to set an attribute and it's value on an element, removeAttribute used to remove it, and hasAttribute method used to check an element has an attribute or not.

classList

The classList property of element used to access and modify classes of an element by calling add, remove and toggle methods on object returned by classList.

scrollIntoView and scrollBy

The scrollIntoView method is a convenient way to smoothly scroll the specified element into the visible area of the browser window. and the scrollBy method used to scroll a specified amount from the current scroll position.

addEventListener

With addEventListener, we can attach event handlers to elements, so we can listen for user interactions and take actions accordingly.

preventDefault

While not a method of the DOM itself, the preventDefault method is commonly used in event handlers to prevent the default action associated with an event, such as preventing a form from submitting or a link from navigating. This can be considered the essence or core of Single Page Applications.

animate

The animate method is used for smoothly animating changes to CSS properties. It returns an Animation object that can be controlled and queried for information about the animation.

requestFullscreen

The requestFullscreen method allows us to make an element take up the full screen. This is particularly useful for immersive web experiences or media playback.

A solid understanding of these DOM methods is crucial for us to create dynamic and interactive web applications. These methods form the foundation for manipulating the DOM, enabling us to build powerful and responsive user interfaces. As you continue to explore web development, mastering these methods will empower you to create more efficient and feature-rich applications.

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