jQuery pseudo selector

gistfile1.html

<input
     id="val1"
     type="text"
     data-validate-required
     data-validate-minlength="3"
     data-validate-email />

<input />

<script>
jQuery.expr.pseudos.attr = $.expr.createPseudo(function(arg) {
    var regexp = new RegExp(arg);
    return function(elem) {
        for(var i = 0; i < elem.attributes.length; i++) {
            var attr = elem.attributes[i];
            if(regexp.test(attr.name)) {
                return true;
            }
        }
        return false;
    };
});

console.log($(":attr(^data-)"));
</script>