Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

JavaScript Interactive Web Pages with JavaScript Selecting Elements and Adding Events with JavaScript Selecting Elements

Giovanni Dalla Rizza
Giovanni Dalla Rizza
10,633 Points

error in code challenge

I have to select two elements in the DOM, using the getElementBy.. methode. It returns me every time an error, can't find it

var fullName = document.getElementById("full_name");
var lastName = document.getElementByClass("last_name");
<!DOCTYPE html>
<h1 id="full_name"><span class="first_name">Andrew</span> <span class="last_name">Chalkley</span></h1>

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

2 Answers

Jennifer Nordell
Jennifer Nordell
Treehouse Teacher

Hi there! I solved this challenge by using the getElementsByTagName method. This is what I used:

var lastName = document.getElementsByTagName("span")[1];

This selects the second span in the document by using the index of 1. Hope this clears things up! :sparkles:

Hannu Shemeikka
Hannu Shemeikka
16,799 Points


I too tried to solve this challenge using getElement* but I got errors. I solved this challenge using

var fullName = document.querySelector("#full_name");
var lastName  = document.querySelector(".last_name");

document.querySelector is a modern replacement for document.getElementBy* method.

# gets by id
. gets by class

The challenge hints that you should use getElementByTagName for the last_name but it didn't work for me, so I used querySelector.

Giovanni Dalla Rizza
Giovanni Dalla Rizza
10,633 Points

Thanks Hannu, I've tried getElementByTagName too, but it didn't work (like you say). I've noticed you have more than 13k points, and you are a member since 31 august 2016. How much do you have practice?:)