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JavaScript JavaScript and the DOM (Retiring) Getting a Handle on the DOM Selecting Multiple Elements

Julien Arseneau
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.a{fill-rule:evenodd;}techdegree
Julien Arseneau
Full Stack JavaScript Techdegree Student 5,200 Points

What is my error?

It says: ''There was an error with your code: TypeError: 'undefined' is not an object (evaluating 'listItems[i].style')''.

index.html
<!DOCTYPE html>
<html>
  <head>
    <title>Rainbow!</title>
  </head>
  <body>
    <ul id="rainbow">
      <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="js/app.js"></script>
  </body>
</html>
js/app.js
const listItems = document.getElementById('rainbow');
const colors = ["#C2272D", "#F8931F", "#FFFF01", "#009245", "#0193D9", "#0C04ED", "#612F90"];

for(var i = 0; i < colors.length; i ++) {
  listItems[i].style.color = colors[i];    
}

1 Answer

Steven Parker
Steven Parker
231,008 Points

The element with the ID of "rainbow" is the list itself (ul). But you want "listItems" to be a collection of all the li elements instead.

You can use a different selector, chain selectors, or use a traversal property on the list.