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

Rob Hudson
Rob Hudson
4,292 Points
Posted by Rob Hudson
Rob Hudson
4,292 Points

Why will let listItems = document.querySelectorAll('#rainbow') now work as the first line of code here?

This should solve the objective??

listItems = document.querySelectorAll('#rainbow')

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

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

3 Answers

Dave McFarland
STAFF
Dave McFarland
Treehouse Teacher
Dave McFarland
Dave McFarland
Treehouse Teacher

Rob Hudson

The code let listItems = document.querySelectorAll('#rainbow'); selects the unordered list element (the <ul> tag), not the list items inside the <ul> tag. You need to modify your code so that it selects the <li> tags.

Rob Hudson
Rob Hudson
4,292 Points
Rob Hudson
Rob Hudson
4,292 Points

Thanks Dave,

For anyone who reads this I was able to accomplish this by using:

document.getElementsByTagName("li");

Selecting the list elements themselves instead of the unordered list.

james south
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
james south
Front End Web Development Techdegree Graduate 33,271 Points
james south
.a{fill-rule:evenodd;}techdegree seal-36
james south
Front End Web Development Techdegree Graduate 33,271 Points

that selects everything with the id of rainbow. to reach inside you need to modify it just a little bit. you can select them just like you would with CSS.

Rob Hudson
Rob Hudson
4,292 Points
Rob Hudson
Rob Hudson
4,292 Points

I thought the objective was to select the ordered list with the id of rainbow? Can you provide me with an example of how I can pass the objective? I am not familiar with CSS much yet, I am new to all of this.

Felipe Jordani
Felipe Jordani
5,091 Points
Felipe Jordani
Felipe Jordani
5,091 Points

Hey all,

I solved the problem using this:

let listItems = document.querySelectorAll('#rainbow > li');

Cheers, Felipe