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

Posted by Katarzyna Wójtowicz
Katarzyna Wójtowicz
Courses Plus Student 4,842 Points

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
43,433 Points
Martin Balon
Martin Balon
43,433 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];    
}
Katarzyna Wójtowicz
PLUS
Katarzyna Wójtowicz
Courses Plus Student 4,842 Points
Katarzyna Wójtowicz
Katarzyna Wójtowicz
Courses Plus Student 4,842 Points

Hi Martin,

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