For example searching
$('[name=whatever]')
should find
 $('[name=whatever]') and  $('[name=WhaTevEr]')
Thanks ;)
Any possible solution is going to be really inefficient, because it cannot work with the browser's native selector engine. It would be better to use a class to identify the elements.
However, if you're insistent on this approach, you can use filter():
$('[name]').filter(function () {
    return this.name.toLowerCase() == "whatever";
});
 
    
    Not directly, but you can have a regex as selector
Take a look at this topic: