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

Posted by Louis Riddle
.a{fill-rule:evenodd;}techdegree seal-36
Louis Riddle
Front End Web Development Techdegree Graduate 12,982 Points

Cannot read property of 1 null

I've looked over my code again and again. I see no errors but it keeps saying "cannot read property of 1 null".

app.js 
// Complete the challenge by writing JavaScript below
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 id="list-items">
      <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

Blake Larson
Blake Larson
13,014 Points
Blake Larson
Blake Larson
13,014 Points

There is only 1 ul element. You want to grab all the li elements.

let listItems = document.getElementsByTagName('li');