Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript jQuery Basics Working with jQuery Collections The .each() method

Posted by Johan Berglund
Johan Berglund
4,968 Points

Why don't we pass "this" as an argument in the function?

this is working:

$('.favorite-things li').each(function() { $(this).prepend("<input type='chechkbox/>'") });

but why is the following not working: $('.favorite-things li').each(function(this) { this.prepend("<input type='chechkbox/>'") });

?

index.html 
<!DOCTYPE html>
<html lang="en">
<head>
    <title>Document</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <h2>My Favorite Things</h2>

    <ul class="favorite-things">
        <li>Kittens</li>
        <li>Rainbows</li>
        <li>Unicorns</li>
        <li>Sprinkles</li>
    </ul>

    <script
    src="jquery-3.2.1.min.js"></script>
    <script src="app.js"></script>
</body>
</html>
app.js 
$('.favorite-things li').each(function() {
  $(this).prepend("<input type='chechkbox/>'")
});
Reggie Williams
Reggie Williams
Treehouse Teacher
Reggie Williams
Reggie Williams
Treehouse Teacher

Hey Johan Berglund ! In this code you're using jquery so $(this) is a jquery object while this is just the element itself

1 Answer

Johan Berglund
Johan Berglund
4,968 Points

Ok good point, thanks!