jQuery基础语法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>jQuery基础语法</title>
<script src="jquery-3.3.1.min.js"></script>
</head>
<body>
<script>
$(document).ready(function () {
$('div').hide()
$('button').click(function () {
$('div').show()
})
})
</script>
<div style="width: 100px;height: 100px;background: pink;">
</div>
<button>点击</button>
</body>
</html>