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jQuery.expr[':'].regex = function(elem, index, match) {
var matchParams = match[3].split(','),
validLabels = /^(data|css):/,
attr = {
method: matchParams[0].match(validLabels) ?
matchParams[0].split(':')[0] : 'attr',
property: matchParams.shift().replace(validLabels,'')
regexFlags = 'ig',
regex = new RegExp(matchParams.join('').replace(/^\s+|\s+$/g,''), regexFlags);
return regex.test(jQuery(elem)[attr.method](;
// Select all elements with an ID starting a vowel:
// Select all DIVs with classes that contain numbers:
// Select all SCRIPT tags with a SRC containing jQuery:
// Yes, I know the last example could be achieved with
// CSS3 attribute selectors; it's just an example...
// Select all elements with a width between 100 and 300:
$(':regex(css:width, ^[1-3]\\d{2}px$)');
// Select all NON block-level DIVs:
$('div:not(:regex(css:display, ^block$))');
// Add data property to all images (just an example);
$(this).data('extension', $(this)[0].src.match(/\.(.{1,4})$/)[1]);
// Select all images with PNG or JPG extensions:
$('img:regex(data:extension, png|jpg)');
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