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JavaScript Interactive Web Pages with JavaScript Traversing and Manipulating the DOM with JavaScript Changing Classes

Brian Bartlett
Brian Bartlett
20,278 Points
Posted by Brian Bartlett
Brian Bartlett
20,278 Points

Why doesn't this work for task2? anchor.classList.toggle("live");

The error message says that I am not using the toggle() method. I'm not sure what the problem is.

app.js 
var anchor = document.querySelector("a");

//Add the class to the classList "selected"

anchor.className = "selected";

//Toggle the class "live"

anchor.classList.toggle("live");
index.html 
<!DOCTYPE html>
<html>
<body>

  <a href="#">Home</a>

  <script src="app.js"></script>

</body>
</html>

2 Answers

Merritt Lawrenson
Merritt Lawrenson
13,477 Points
Merritt Lawrenson
Merritt Lawrenson
13,477 Points

I checked and 'anchor.className = "selected";' does pass the first part of the challenge for some reason, but it's not the method the challenge wants, and part 2 won't pass if you use it.

Part one wants you to use the 'classList' property to add the class "selected". To add a class like this, you'll want to use the 'classList.add()' method to add that class to the list of classes. That'll make the code challenge complete sucessfully.

var anchor = document.querySelector("a");

//Add the class to the classList "selected"

anchor.classList.add("selected");  

//Toggle the class "live"

anchor.classList.toggle("live");
Erik McClintock
Erik McClintock
45,783 Points
Erik McClintock
Erik McClintock
45,783 Points

Brian,

Your code for the toggle method is correct, but you need to make sure you're leaving the the code from the previous task in the challenge (the "anchor.classList.add('selected')" code).

You want this as your final code:

var anchor = document.querySelector("a");

//Add the class to the classList "selected"

anchor.classList.add('selected');

//Toggle the class "live"

anchor.classList.toggle('live');

Erik