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Stephen Gough Jr
4,187 PointsCan't get <li> elements to be capitalized with JS
I wanted to get a little practice and boost my confidence by doing something I thought was simple, but even this simple exercise has proved too much, and I'm beginning to wonder if I am wasting my time. I'm using notepad++ for this exercise, and the JS file is properly scripted inside the HTML. My JS code is:
var nameProper = document.getElementsByTagName("li"); nameProper.addEventListener("mouseover", (event) => { if (event.target.tagName = "li") { event.target.toUpperCase() }; });
Whenever I run it, I get some type error on line 2 (saying name.Proper isn't a function) and it won't even run. I tried copying a bit of code I've used in the TeamTreeHouse videos (I'm currently on the "Javascript and the DOM" course of the Front End Development Track). What am I doing wrong? How can I get a much stronger grasp on JS? As I am now, I feel like I understand what I'm being taught, but trying to apply anything I've learned is amazingly inefficient.
1 Answer
Steven Parker
231,007 Pointsthe "getElementsByTagName" function returns a collection of elements. But wile a single element has a "addEventListener" function, a collection does not.
If you want to add an event listener to each item in the collection, you'll need a loop to set them one at a time. Or if you only want to add it to a single one, you need to pick it out of the collection with an index.