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

Posted by jocelin queau
jocelin queau
7,705 Points

i get the error SyntaxError: app.js: Assigning to rvalue `w` (4:2) but i don't understand i have typed warning..

see my app.js

app.js 
const warning = document.getElementById("warning");
let button = document.getElementById("makeItRed");
button.addEventListener( 'click' , function (){
  warning.style.background-color = '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>

1 Answer

deebird
deebird
7,558 Points

Hey,

The closing of you function has an extra semicolon and "background-color" is not valid in javascript you should use "backgroundColor" instead

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

button.addEventListener('click', function (){
  warning.style.backgroundColor = 'red';
});
jocelin queau
jocelin queau
7,705 Points

Thank you ! Very helpful