Why, when I load my array and try to get its length, it just splashes out the number of bytes the array is in

Question

When I use the jQuery library to load an array and get its length using my own javascript, it just splashes out the total number of bytes of the array, for example:

$.get({
  url: 'https://rawgit.com/tvman-123/shrek/master/ExampleOutputForSubscription_Post.php', //
  data: {},
  success: function(data) {
    ParseData(data);
  }
});


function ParseData(data) {
  console.log(data.length) //Returns 221
}

<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>

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But when I turn on the inline array, it works as expected, like so:

data=["UU9CuvdOVfMPvKCiwdGKL3cQ","UUrTNhL_yO3tPTdQ5XgmmWjA","UUz-RZblnhjXK_krP1jDybeQ","UUc_xdkOBgSYLmXTn-VSQ4uA","UUmb8hO2ilV9vRa8cilis88A","UU45SDrjKlPSY0bTvH6F7TOA","UUdGkmb5zEDXnPSmQlV43t0Q","UUpeGBKn0axOJAcPHkcPiXcg",""]
ParseData(data)

function ParseData(data){
console.log(data.length)//Returns 9
}

<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>

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I understand that the first one is an array of bytes, and the second is an arraylist.

Can someone explain to me why this is done and how to fix it ???

EDIT:

Thanks to everyone for your answers and helped me solve this problem.

Answer 1

- JSON! add dataType: "json"

$.get({
  url: 'https://rawgit.com/tvman-123/shrek/master/ExampleOutputForSubscription_Post.php', //
  data: {},
  dataType: "json",
  success: function(data) {
    console.log(data.length); // data is parsed.. =)
  }
});

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Answer 2

JSON.parse, ( ).

$.get({
  url: 'https://rawgit.com/tvman-123/shrek/master/ExampleOutputForSubscription_Post.php', //
  data: {},
  success: function(data) {
    ParseData(JSON.parse(data));
  }
});


function ParseData(data) {
  console.log(data.length);
}

<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>

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Answer 3

, ( JSON). , .

JSON . .

JSON . JSON.parse(data), .

Answer 4

. , , - , . Array, .

, , . Array, , ( ) JSON api parse. .