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JavaScript JavaScript and the DOM (Retiring) Responding to User Interaction Adding an Event Listener

Posted by Daniel Benisti
.a{fill-rule:evenodd;}techdegree seal-36
Daniel Benisti
Front End Web Development Techdegree Graduate 22,224 Points

my head is up side down

i cant find the problem

app.js 
const warning = document.getElementById("warning");
let button = document.querySelector("#makeItRed");
button.addEventListener('click' , () => {

 warning.style.backgroundcolor = "red"});
index.html 
<!DOCTYPE html>
<html>
    <head>
        <title>Adding an Event Listener</title>
    </head>
    <link rel="stylesheet" href="style.css" />
    <body>
        <div id="warning">
            Warning: My background should be red!
        </div>
        <button id="makeItRed">Make It Red!</button>
        <script src="app.js"></script>
    </body>
</html>

2 Answers

Steven Parker
Steven Parker
231,271 Points
Steven Parker
Steven Parker
231,271 Points

In JavaScript, CSS style property names use camel case.

So where you have "backgroundcolor", it should be "backgroundColor" (with a capital "C").

Daniel Benisti
.a{fill-rule:evenodd;}techdegree seal-36
Daniel Benisti
Front End Web Development Techdegree Graduate 22,224 Points

thank you very much

furkan
furkan
11,733 Points
furkan
furkan
11,733 Points

Here is the answer to those questions:

const warning = document.getElementById("warning");
let button = document.getElementById("makeItRed");

button.addEventListener('click', () => {
       warning.style.backgroundColor = "red";
  });
Daniel Benisti
.a{fill-rule:evenodd;}techdegree seal-36
Daniel Benisti
Front End Web Development Techdegree Graduate 22,224 Points

thanks!