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31 lines (26 loc) · 541 Bytes
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<!doctype html>
<html lang="en">
<head>
<title>JavaScript Patterns</title>
<meta charset="utf-8">
</head>
<body>
<script>
/* Title: selector cache
Description: using selector cache to avoid requery
*/
// antipattern
$('.list-item').click(function () {
$('.photo').hide();
});
// preferred
var photo;
$('.list-item').click(function () {
photo = photo || $('.photo');
photo.hide();
});
// References
// http://ejohn.org/blog/learning-from-twitter/
</script>
</body>
</html>