getElementsByClassName :: Element |
The returned array reflects the document order (e.g. an index of 0 refers to the topmost descendant of element with class className).
Examples
<ul id="fruits"> <li id="apples">apples <ul> <li id="golden-delicious">Golden Delicious</li> <li id="mutsu" class="yummy">Mutsu</li> <li id="mcintosh" class="yummy">McIntosh</li> <li id="ida-red">Ida Red</li> </ul> </li> <li id="exotic" class="yummy">exotic fruits <ul> <li id="kiwi">kiwi</li> <li id="granadilla">granadilla</li> </ul> </li> </ul>
$('fruits').getElementsByClassName('yummy'); // -> [li#mutsu, li#mcintosh, li#exotic]
$('exotic').getElementsByClassName('yummy'); // -> []
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Prototype API 1.5.0 - prototypejs.org