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

Could you please explain to me why this version is not accepted?

It's not passing the verification, but lines were colored correctly.

js/app.js
var listItems = document.querySelector("#rainbow");
var colors = ["#C2272D", "#F8931F", "#FFFF01", "#009245", "#0193D9", "#0C04ED", "#612F90"];

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

2 Answers

Martin Balon
Martin Balon
43,651 Points

Hi Katarzyna, The code you posted works but I guess the challenge checks whether listItems contains an array or a collection of items - it seems that they don't want you to change for loop. There are multiple ways how to achieve that. I've used querySelector on ul and extracted children right away to get a collection of all li. Or you can use getElementsByTagName which returns an array by default.

var listItems = document.getElementsByTagName('li');
var colors = ["#C2272D", "#F8931F", "#FFFF01", "#009245", "#0193D9", "#0C04ED", "#612F90"];

for(var i = 0; i < colors.length; i ++) {
  listItems[i].style.color = colors[i];    
}
var listItems = document.querySelector("#rainbow").children;
var colors = ["#C2272D", "#F8931F", "#FFFF01", "#009245", "#0193D9", "#0C04ED", "#612F90"];

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

Hi Martin,

Thank you so much for your explanation, it helped! :)