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 JavaScript and the DOM Getting a Handle on the DOM Select by Tag Name

Posted by Adlan Ilyasov
Adlan Ilyasov
2,476 Points

Cannot read property '1' of null Im not really sure what im doing wrong here. Help would be appriciated

I cant seem to figure this one out

app.js 
const colors = ["#C2272D", "#F8931F", "#FFFF01", "#009245", "#0193D9", "#0C04ED", "#612F90"];
let listItems = document.getElementsByTagName('ul');


for ( let i = 0; i < colors.length; i++ ) {
  listItems[i].style.color = colors[i];    
}
index.html 
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <title>JavaScript and the DOM</title>
  </head>
  <body>
    <h1>My List</h1>
    <ul>
      <li>This should be red</li>
      <li>This should be orange</li>
      <li>This should be yellow</li>
      <li>This should be green</li>
      <li>This should be blue</li>
      <li>This should be indigo</li>
      <li>This should be violet</li>
    </ul>
    <script src="app.js"></script>
  </body>
</html>

1 Answer

Guillermo Gallo
seal-mask
.a{fill-rule:evenodd;}techdegree
Guillermo Gallo
Full Stack JavaScript Techdegree Student 8,518 Points
Guillermo Gallo
.a{fill-rule:evenodd;}techdegree
Guillermo Gallo
Full Stack JavaScript Techdegree Student 8,518 Points

Hi Adlan Ilyasov

Your code is mostly right. The only thing you need to change is your listItems variable, you are currently getting the <ul> list and not the <li> list items, so you need to change it like so:

// replace this
// let listItems = document.getElementsByTagName('ul');

// with this
let listItems = document.getElementsByTagName('li');

Hope this helps