jQuery animation doesn't work for HTML files

Tell us what’s happening:
I try to save the solution as HTML file, add additional script to add JQuery links, but unfortunately the animated effect doesn’t work just like in Freecodecamp console. Such as $("#target3").addClass("animated fadeOut"); button target3 doesn’t fade out as expected.
but button3 have properties like btn-primary respectively.

Is there any wrong code as i’m expected (button target3 fadeout & animation is working) the same thing if i’ve save the solution as HTML files.

Needs, help and explanation.

Your code so far

<!DOCTYPE html>
<html lang="en">
    <meta charset=utf-8>
    <meta name="viewport" content="width=device-width, intial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie-edge">
    <title>FreeCodeCamp Course</title>
    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
  $(document).ready(function() {
    $("button").addClass("animated bounce");
    $(".well").addClass("animated shake");
    $("#target3").addClass("animated fadeOut");

<!-- Only change code above this line. -->

<div class="container-fluid">
  <h3 class="text-primary text-center">jQuery Playground</h3>
  <div class="row">
    <div class="col-xs-6">
      <div class="well" id="left-well">
        <button class="btn btn-default target" id="target1">#target1</button>
        <button class="btn btn-default target" id="target2">#target2</button>
        <button class="btn btn-default target" id="target3">#target3</button>
    <div class="col-xs-6">
      <div class="well" id="right-well">
        <button class="btn btn-default target" id="target4">#target4</button>
        <button class="btn btn-default target" id="target5">#target5</button>
        <button class="btn btn-default target" id="target6">#target6</button>

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36.

Link to the challenge:

You are missing the animate.css library.

Thanks RandellDawson.

Finally find out what is missing.
I’ve add in head section.

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.7.2/animate.min.css">