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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <ul>
  <li data-animal="dog">Dog</li>
  <li data-animal="dog">Dog</li>
  <li data-animal="raccoon">Raccoon</li>
  <li data-animal="cat">Cat</li>
  <li data-animal="cat">Cat</li>
</ul>

            
          
!
            
              html,body{
  background:#333;
  font-family:"Arial";
  color:white;
}

ul{
  font-size:20px;
  color:white;
  line-height:30px;
}


            
          
!
            
              // Get the dogs
var dogs = $("li[data-animal='dog']");
dogs.css("color","lime");
console.log(dogs.length);
//output: 2



//Now our dogs grew flippers and learned to swim. So let's change animals with data attribute 'dog' to 'seal'
dogs.data("animal","seal");
dogs.each(function(){
  $(this).text("seal");
});

//loot at the output
$("li").each(function(){
  console.log($(this).data())
});

/* Output:
Object {animal: "seal"}
Object {animal: "seal"}
Object {animal: "raccoon"}
Object {animal: "cat"}
Object {animal: "cat"}
*/

// Cool, Jquery updated our dogs to seals. But now let's try to select our seals:
var seals = $("li[data-animal='seal']");
console.log(seals.length);

//nada....

/*Changing attributes using Jquery's '.data()' doesn't actually change the dom. If we look at our list element again, we still see the 'data-animal=dog.'

<ul>
  <li data-animal="dog">seal</li>
  <li data-animal="dog">seal</li>
  <li data-animal="raccoon">Raccoon</li>
  <li data-animal="cat">Cat</li>
  <li data-animal="cat">Cat</li>
</ul>

So if we need to use that selector later, we need to change the data value on the dom using the '.attr()' function.
*/

var seals = $("li[data-animal='dog']").attr("data-animal",'seal').data('animal','seal');

//Now we see two seals
console.log(seals.length);

$("li").each(function(){
  console.log($(this).data())
});

//let's change them to blue since the live in water
seals.css("color","blue")





            
          
!
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