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<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script>
$(document).ready(function () {
$(".btn1").click(function () {
$(".div").fadeToggle();
});
});
</script>
</head>
<body>
<button class="btn1">Animate</button>
<div class="div">
<div class="div1" style="border:1px solid black;">Hello jQuery!</div>
<div class="div2" style="border:1px solid black;">Hello world!</div>
<div class="div3" style="border:1px solid black;">Hello all!</div>
</div>
</body>
</html>
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