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 JavaScript and the DOM (Retiring) Getting a Handle on the DOM Using CSS Queries to Select Page Elements

couldn't change the colors

app.js file

const myList = document.getElementsByTagName("li");

for (let i =0 ; i < myList.lengthl; i +=1){ myList[i].style.color = "purple"; }

const errorNotPurple = document.querySelectorAll(".error-not-purple");

for (let i =0 ; i < errorNotPurple.lengthl; i +=1){ errorNotPurple[i].style.color = "red"; }

const evens = document.querySelectorAll('li:nth-child(even)');

for (let i =0 ; i < evens.lengthl; i +=1){ evens[i].style.backgroundColor = "lightgray"; }

index.HTML file

<!DOCTYPE html> <html> <head> <title>JavaScript and the DOM</title> <link rel="stylesheet" href="css/style.css"> </head> <body> <h1 id="myHeading">JavaScript and the DOM</h1> <p>Making a web page interactive</p>

<p title="label">Things that are purple:</p>

<ul> <li>grapes</li> <li class= "error-not-purple">orages</li> <li>amethyst</li> <li>lavender</li> <li class= "error-not-purple">sun</li> <li class= "error-not-purple">snow</li> <li>plums</li> </ul> <script src="app.js"></script> </body> </html>

1 Answer

nico dev
nico dev
20,364 Points

Hi ghaidas,

your code seems fine, except you have an l (L letter) at the end every time you used the length property.

I think if you remove that l every time it appears and return to the normal length you should be good to go. :)