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

kingdavid igbayilola
kingdavid igbayilola
8,678 Points

event listener DOM

warning = document.body.stye.backgroundColor(''red');

Am getting a syntax error here

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

button.addEventListener('click', ()=> {
    warning = document.body.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
215,939 Points

The "backgroundColor " is not a method you can call, but it is a property that you can assign to:

    document.body.style.backgroundColor = "red";
kingdavid igbayilola
kingdavid igbayilola
8,678 Points

how can i go about giving class "warning" a background color red

Steven Parker
Steven Parker
215,939 Points

You can assign any specifc element instead of the document body the same way:

    warning.style.backgroundColor = "red";

And "warning" is not a class, but an id attribute.

Thomas Tilton-Heylin
Thomas Tilton-Heylin
12,098 Points
$('#makeItRed').click(function() {
$('#warning').css('backgroundColor', 'red')
});