Is there a case insensitive jQuery :contains selector?

Question

Is there a case insensitive version of the :contains jQuery selector or should I do the work manually by looping over all elements and comparing their .text() to my string?<

Answer 1

A variation that seems to perform slightly faster and that also allows regular expressions is:

jQuery.extend (
    jQuery.expr[':'].containsCI = function (a, i, m) {
        //-- faster than jQuery(a).text()
        var sText   = (a.textContent || a.innerText || "");     
        var zRegExp = new RegExp (m[3], 'i');
        return zRegExp.test (sText);
    }
);

---

Not only is this case-insensitive, but it allows powerful searches like:

• $("p:containsCI('\\bup\\b')") (Matches "Up" or "up", but not "upper", "wakeup", etc.)
• $("p:containsCI('(?:Red|Blue) state')") (Matches "red state" or "blue state", but not "up state", etc.)
• $("p:containsCI('^\\s*Stocks?')") (Matches "stock" or "stocks", but only at the start of the paragraph (ignoring any leading whitespace).)