Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript jQuery Basics (2014) Creating a Simple Lightbox Perform: Part 1

Trouble with "this" and e.target

I have been using arrow functions consistently and when I do this with this code it logs "undefined"

//Problem: User when clicking on an image goes to a dead end
//Solution: Create an overlay with the large image

//1, Capture the click event on a link to an image
$("#imageGallery a").click(e => {
    let href = $(e.target).attr('href');
    //1.1, Show the overlay
    //1.2, Update overlay with the image linked in the link
    //1.3, Get child's alt atribute and set caption
//2, Add overlay 
    //2.1, An image
    //2.2, A caption
//3, When overlay is clicked 
    //3.1, Hide the overlay

1 Answer

28,558 Points

this within regular jQuery functions is equivalent to e.currentTarget not e.target. So if you use e.currentTarget like this:

$("#imageGallery a").click(e => {
    let href = $(e.currentTarget).attr('href');

Then the code will work.

The difference between currentTarget and target is that currentTarget will always refer to the element that the event listener is attached to, the a elements in this case. Whereas target refers to the element that actually triggered the event, which in this case is the img elements inside the a elements.

This is simple the way you explained! Thanks alot this really helps.