CSS选择器对属性不区分大小写

$(\':input[name]\').filter(function() {
   return this.value.toLowerCase() == \'search\';
});

$.expr[\':\'].valueCaseInsensitive = function(node, stackIndex, properties){
     return node.value.toLowerCase() == properties[3];
};

var searchInputs = $(\':input:valueCaseInsensitive(\"Search\")\');

:input[value:toLowerCase=\"search\"]

$.expr[\':\'].attrCaseInsensitive = function(node, stackIndex, properties){
    var args = properties[3].split(\',\').map(function(arg) {
        return arg.replace(/^\\s*[\"\']|[\"\']\\s*$/g, \'\');  
    });
    return $(node).attr(args[0]).toLowerCase() == args[1];
};

var searchInputs = $(\'input:attrCaseInsensitive(value, \"search\")\');

eval()

,

\'

\"

,

map()

args

Array

input[value=\'search\' i]

input[value=\'Search\'] matches
input[value=\'search\' i] Also matches in latest browsers

$(\'input\').filter(function() {
    return $(this).attr(\'value\').toLowerCase() == \'search\';
});