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![Adlan Ilyasov](https://secure.gravatar.com/avatar/d90912ff4ee3986d1774665c31c69739?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Adlan Ilyasov
2,476 PointsYou didn't pass a function as the second agument to 'addEventListener'.
how do i pass a function to eventlistener?
var warning = document.getElementById("warning");
var button = document.getElementById("makeItRed");
button.addEventListener('click');
<!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
![Steven Parker](https://uploads.teamtreehouse.com/production/profile-photos/969492/micro_tool_chess_set_2.jpg)
Steven Parker
230,688 PointsAfter a comma to separate it from the first argument, you can either put the name of an existing function or you can create an anonymous function expression. The latter is a popular use of "arrow" functions.
There are examples of this in the video lesson just prior to the challenge.