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

Joyce van den Berg
Joyce van den Berg
10,684 Points
Posted by Joyce van den Berg
Joyce van den Berg
10,684 Points

Click event listener: how to pass an empty function in as the second parameter?

I've checked for spelling mistakes, missing brackets and scoured the internet for an answer. I can't find out why this won't let me pass to the last task. Am I making a mistake in the click event listener or is there something wrong with the empty function part?

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

paulscanlon
paulscanlon
Courses Plus Student 26,735 Points

Hey Joyce

Almost, once you have assigned the element selector to the button variable, add the event listener onto the variable not chained to the end, like this.

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

button.addEventListener('click', () => {

});

Also try and use const for your element selectors wherever possible. Give me a shout if you need anymore help

Happy coding

Paul

Joyce van den Berg
Joyce van den Berg
10,684 Points
Joyce van den Berg
Joyce van den Berg
10,684 Points

Thanks Paul, you're a lifesaver :)