JQuery .addClass() /.removeClass()

by Taufik Nurrohman

HTML

<div class="sample">
    <article class="contoh"></article>
</div>
<div class="sample">
    <article class="contoh"></article>
</div>
<div class="sample">
    <article class="contoh"></article>
</div>
<div class="sample">
    <article class="contoh"></article>
</div>
<div class="sample">
    <article class="contoh"></article>
</div>

CSS

body {padding:50px;}

div {
    margin:0 0 10px;
    border:1px solid blue;
    padding:10px;
}

article {
    border:1px solid red;
    height:20px;
}

.salah {
    background-color:black;
}

JavaScript

$(function() {
    $('.sample').eq(1).find('.contoh').addClass('salah');
});