Webolution Designs

Selecting DOM Elements

Share This Post

There are several ways to grab DOM elements using the document object. We can use the id…

let myElem = document.getElementById(‘elementId’); 

This will grab the DOM element that has the ID we pass to the getElementById function and stores it in the variable.

We can get elements by the class name…

let myElem = document.getElementsByClassName(‘elementClassName’); 

This will grab all the elements with the class name passed to the getElementsByClassName method. It will return them as an array and store them in the variable. This is the largest difference between grabbing DOM elements by ID versus class. Grabbing them by ID only returns the one element because there can (should) only be one element with that ID on the page. The can be multiple elements with the class name though.

We can also grab by tag name…

let myElem = document.getElementsByTagName(‘p’); 

In this example, we are getting all of the paragraph elements on the page and storing them as an array in the variable.

We can also utilize css selectors with two additional methods…querySelector and querySelectorAll…

let myElem = document.querySelector(‘elementId’); 

In this example, we can grab any element by a css selector. I have the ID in the method, but we can pass a class, a tag or a combination of those. For example, if we would like a paragraph tag with the ID of intro…

let myElem = document.querySelector(‘p#intro’); 

We can also grab several elements…

let myElem = document.querySelectorAll(‘css selector’); 

Again, we can use css selectors. This difference here is we can grab several elements and they return as an array. For example, if we wish to grab all images that have a class of gallery…

let myElem = document.querySelectorAll(‘img.gallery’); 

Happy Coding!

Clay Hess

Subscribe To Our Newsletter

Get updates and learn from the best

More To Explore

Code

Curriculum Innovation or Confusion

It is an early Monday morning just prior to the beginning of the semester.  A faculty member walks into the institution where he teaches.  He

Code

Creating a Promise

Promises are used for asynchronous code. It is a temporary holder for a value that gets returned by an asynchronous call. For example, a call

Do You Want To Boost Your Business?

drop us a line and keep in touch

Excuse Our Mess! We are currently remodeling!

We are currently in the process of redesigning our site. We appreciate your patience as some areas of our site show chipping and paint peeling. We hope to have it sparkling soon!

small_c_popup.png

Learn how we helped 100 top brands gain success.

Let's have a chat