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How can I prevent my FadeIn animation from repeating when I refresh or click divs

I'm trying to create a todo board with sticky notes. I'm using vanilla js to practise. After pressing the add button, a new div appears with a fadeIn animation. Every time I refresh the page or press the line with the notes, the FadeIn animation repeats.
I've tried to give my div a class when adding throw dom, but I cannot figure out how to remove it after adding a new div (a new note). I know my code is messed up, I'm just experimenting with JS, CSS and HTML for fun. Any advice will be accepted with great pleasure I'm here to learn.
let stickyNotesArr = [];
const notesColor = ['#7afcff', '#feff9c', '#ff7eb9'];
if (localStorage.getItem('notesLclArr')) {
stickyNotesArr = JSON.parse(localStorage.getItem('notesLclArr'));
};
const cards = document.querySelector('#cards');
const sendBtn = document.querySelector('#sendBtn');
const resetBtn = document.querySelector('#resetBtn');
const date = document.querySelector('#date');
const time = document.querySelector('#time');
const txtInp = document.querySelector('#txtinp');
sendBtn.addEventListener('click', () => {
const randomColor = notesColor[Math.floor(Math.random() * notesColor.length)];
stickyNotesArr.push({
txtinp: txtInp.value,
date: date.value,
time: time.value,
color: randomColor
});
addStickyNts();
resetBtn.click();
});
function addStickyNts() {
cards.innerHTML = '';
let count = 0;
for (note of stickyNotesArr) {
const ntsRows = `
<div class="notesDiv mb-4" style="background-color: ${note.color};">
<div class='d-flex justify-content-end'>
<button type='button' class='btn myCustomBtn deleteBtn' ><i data-id=${count} class="deleteBtn fa-solid fa-xmark"></i></button>
</div>
<div class='txtArea d-flex scrollbar scrollbarNote'>${note.txtinp}</div>
<div class='timeNdate'>${note.date}<br>${note.time}</div>
</div>
`
count++
cards.insertAdjacentHTML('beforeend', ntsRows);
};
localStorage.setItem('notesLclArr', JSON.stringify(stickyNotesArr));
};
addStickyNts();
cards.addEventListener('click', (event) => {
let myId;
if (event.target.getAttribute('data-id')) {
myId = event.target.getAttribute('data-id');
};
if (event.target.classList.contains('deleteBtn')) {
stickyNotesArr.splice(myId, 1);
};
addStickyNts();
});
resetBtn.addEventListener('click', () => {
txtInp.value = '';
date.value = '';
time.value = '';
})
addStickyNts();
body {
font-family: 'Dancing Script', cursive;
}
#bgrImg {
margin: 1em;
background-image: url("images/pexels-fwstudio-168442.jpg");
background-size: 100% auto;
border: 1em solid #7f55398e;
border-radius: 15px;
min-height: 96vh;
background-clip: border-box;
}
h1 {
font-family: 'Abril Fatface', cursive;
text-align: center;
}
#mainDiv {
height: 400px;
width: 400px;
position: relative;
}
#txtinp {
position: absolute;
top: 91px;
left: 104px;
border: transparent;
background-color: transparent;
font-size: 1.5em;
outline: none;
resize: none;
overflow: auto;
transition: all 1s ease-out;
}
#duedate {
position: absolute;
top: 286px;
left: 142px;
font-size: 1.2em;
transition: 0.5s;
}
#duetime {
position: absolute;
top: 317px;
left: 187px;
font-size: 1.2em;
transition: 0.3s;
}
#duedate:hover,
#duetime:hover {
transform: translateY(-2px);
}
#time,
#date {
border: transparent;
background-color: transparent;
max-width: 125px;
outline: none;
}
#sendBtn {
position: absolute;
top: 296px;
left: 39px;
background-color: transparent;
border: transparent;
font-size: 1.4em;
transition: 0.5s;
}
#resetBtn {
position: absolute;
top: 322px;
left: 48px;
background-color: transparent;
border: transparent;
font-size: 1.4em;
transition: 0.5s;
}
#sendBtn:hover,
#resetBtn:hover {
color: #767676;
font-size: 1.2em;
cursor: pointer;
}
.notesDiv {
transition: 0.4s;
display: flex;
flex-direction: column;
width: 250px;
height: 250px;
font-size: 20px;
word-break: break-word;
}
.notesDiv:hover {
transform: scale(1.05);
box-shadow: 5px 5px 10px 3px rgba(0, 0, 0, 0.5);
}
.myCustomBtn {
display: flex;
visibility: hidden;
justify-content: center;
align-items: center;
margin-top: 5px;
margin-left: 200px;
border: none;
padding: 0px;
}
.notesDiv:hover .myCustomBtn {
visibility: visible;
}
.timeNdate {
margin-top: auto;
overflow: none;
}
#keyframes fadeIn {
0% {
opacity: 0;
}
100% {
opacity: 1;
}
}
.notesDiv {
animation: fadeIn 0.5s 1;
}
.notesDiv.animated {
animation: fadeIn paused;
}
.txtArea {
margin-top: 5px;
overflow: auto;
}
/*.........................................................................................................................*/
/*MY CUSTOM SCROLL BAR WORKING WITH EDGE/CHROME*/
.scrollbar::-webkit-scrollbar {
width: 12px;
background-color: #f5f5f53b;
scrollbar-color: grey;
border-radius: 10px;
}
.scrollbar::-webkit-scrollbar-thumb {
border-radius: 5px;
-webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.1);
background-color: #afb1b454;
}
/* FOR MOZILLA FIRE-FOX ONLY:*/
#-moz-document url-prefix() {
.scrollbar {
width: 240px;
scrollbar-color: grey;
border-radius: 10px;
}
.scrollbarNote {
width: 230px;
scrollbar-color: grey;
border-radius: 10px;
}
}
/*.........................................................................................................................*/
#media (max-width: 560px) {
#bgrImg {
width: 100%;
min-width: 460px;
}
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.3.0-alpha1/dist/css/bootstrap.min.css" rel="stylesheet"
integrity="sha384-GLhlTQ8iRABdZLl6O3oVMWSktQOp6b7In1Zl3/Jr59b6EGGoI1aFkw7cmDA6j6gD" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.3.0-alpha1/dist/js/bootstrap.bundle.min.js"
integrity="sha384-w76AqPfDkMBDXo30jS1Sgez6pr3x5MlQ1ZAGC+nuZB+EYdgRZgiwxhTBTkF7CXvN"
crossorigin="anonymous"></script>
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link
href="https://fonts.googleapis.com/css2?family=Abril+Fatface&family=Dancing+Script:wght#400;500;600;700&family=Lobster&display=swap"
rel="stylesheet">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.2.1/css/all.min.css"
integrity="sha512-MV7K8+y+gLIBoVD59lQIYicR65iaqukzvf/nwasF0nqhPay5w/9lJmVM2hMDcnK1OnMGCdVK+iQrJ7lzPJQd1w=="
crossorigin="anonymous" referrerpolicy="no-referrer" />
<link rel="stylesheet" href="boardstyle.css">
</head>
<body>
<div id="bgrImg">
<form id="npdform">
<h1 class="text-light">Write Down Your Tasks:</h1>
<div id="mainDiv" class="d-flex justify-content-center m-auto">
<img id="inpImg" class="img-fluid" src="images/notepad-icon-17524.png">
<textarea class="scrollbar" id="txtinp" rows="5" cols="22" placeholder="write a task"></textarea>
<div id="duedate">
<label for="date">Due Date:</label>
<input id="date" type="date">
</div>
<div id="duetime">
<label for="time">Time:</label>
<input id="time" type="time">
</div>
<button class="ntpdBtns" id="sendBtn" type="button">
Add<i class="fa-solid fa-check"></i>
</button>
<button class="ntpdBtns" id="resetBtn" type="button">
Reset<i class="fa-solid fa-eraser"></i></i>
</button>
</div>
</form>
<section class="container-fluid">
<div id="cards" class="row d-flex justify-content-evenly">
</div>
</section>
</div>
<script src="boardfeatures.js"></script>
<script src=" https://cdn.jsdelivr.net/npm/#popperjs/core#2.11.6/dist/umd/popper.min.js"
integrity="sha384-oBqDVmMz9ATKxIep9tiCxS/Z9fNfEXiDAYTujMAeBAsjFuCZSmKbSSUnQlmh/jp3"
crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.3.0-alpha1/dist/js/bootstrap.min.js"
integrity="sha384-mQ93GR66B00ZXjt0YO5KlohRA5SY2XofN4zfuZxLkoj1gXtW8ANNCe9d5Y3eG5eD"
crossorigin="anonymous"></script>
</body>
</html>

Textarea typing then show star rating

I have this star rate form and wanted you to start typing in the text area and it will show you the star rate form right away, but if the text area is empty, it will hide.
I discovered the following code:
<HTML>
<input placeholder="Enter some text" name="name" />
<p id="values"></p>
<JS>
const input = document.querySelector('input');
const log = document.getElementById('values');
input.addEventListener('input', updateValue);
function updateValue(e) {
log.textContent = e.target.value;
}
How can I combine this code into mine? Because it only does that now when I click outside of the text area and then show the stars. Please advise me on this!
#import url(https://fonts.googleapis.com/css?family=Roboto:500,100,300,700,400);
* {
margin: 0;
padding: 0;
font-family: roboto;
}
body {
background: #000;
}
.cont {
width: 93%;
max-width: 350px;
text-align: center;
margin: 4% auto;
padding: 30px 0;
background: #111;
color: #EEE;
border-radius: 5px;
border: thin solid #444;
}
hr {
margin: 20px;
border: none;
border-bottom: thin solid rgba(255, 255, 255, .1);
}
div.title {
font-size: 2em;
}
h1 span {
font-weight: 300;
color: #Fd4;
}
div.stars {
width: 270px;
display: inline-block;
}
input.star {
display: none;
}
label.star {
float: right;
padding: 10px;
font-size: 36px;
color: #444;
transition: all .2s;
}
input.star:checked~label.star:before {
content: '\f005';
color: #FD4;
transition: all .25s;
}
input.star-5:checked~label.star:before {
color: #FE7;
text-shadow: 0 0 20px #952;
}
input.star-1:checked~label.star:before {
color: #F62;
}
label.star:hover {
transform: rotate(-15deg) scale(1.3);
}
label.star:before {
content: '\f006';
font-family: FontAwesome;
}
.rev-box {
height: 0;
width: 100%;
transition: all .25s;
}
textarea.review {
background: #222;
border: none;
width: 50%;
max-width: 100%;
height: 50px;
padding: 10px;
box-sizing: border-box;
color: #EEE;
}
label.review {
display: block;
transition: opacity .25s;
}
input.star:checked~.rev-box {
height: 125px;
overflow: visible;
}
<html>
<head>
<link rel="stylesheet" href="startratecss.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/rateYo/2.2.0/jquery.rateyo.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/rateYo/2.2.0/jquery.rateyo.min.js"></script>
</head>
<body>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.2.0/css/font-awesome.min.css" />
<div class="cont">
<div class="stars">
<form>
<div class="rev-box">
<textarea class="review" id="review" cols="2" rows="2" name="review" onchange="asd(this)"></textarea>
</div>
<div id="rateYo" style="visibility: hidden;"></div>
<input type="hidden" name="rating" id="rating_input" />
</form>
</div>
</div>
<script>
function asd(txt) {
var something = txt.value;
var star = document.getElementById("rateYo");
star.style.visibility = "visible";
}
$(function MyFunction() {
$("#rateYo").rateYo({
onSet: function(rating, rateYoInstance) {
rating = Math.ceil(rating);
$('#rating_input').val(rating); //setting up rating value to hidden field
var bod = document.getElementById("review").value;
window.location.href = 'mailto:your#gmail.com?subject=' + rating + ' of 5' + '&body=' + bod;
}
});
});
</script>
</body>
</html>

I have taken the liberty of rewriting your code to accomplish what you are trying to do.
Two tips I want to give you:
Decouple the data layer with the presentation layer. You are mixing CSS styles in stylesheets, HTML and JavaScript. You are also having JavaScript as strings in your HTML attributes. This gets confusing quite rapidly! We have gone a long way since HTML4 and the 90's!
If you use a library, then use it. For example, you are using jQuery, then use it as it should instead of adding event handlers directly to the HTML attributes; jQuery has $(element).on(event, handler), don't do <div onclick="something(this)"></div>.
$(function MyFunction() {
const textInput = $("#review").on('input', function () {
if (textInput.val().length) {
rateStar.show();
} else {
rateStar.hide();
}
});
const ratingInput = $('#rating_input');
const rateStar = $("#rateYo").rateYo({
onSet: function(rating, rateYoInstance) {
let inputValue = textInput.val();
ratingInput.val(Math.ceil(rating)); //setting up rating value to hidden field
console.log( rating, inputValue );
// window.location.href = 'mailto:your#gmail.com?subject=' + rating + ' of 5' + '&body=' + bod;
}
}).hide();
});
#import url(https://fonts.googleapis.com/css?family=Roboto:500,100,300,700,400);
* {
margin: 0;
padding: 0;
font-family: roboto;
}
body {
background: #000;
}
.cont {
width: 93%;
max-width: 350px;
text-align: center;
margin: 4% auto;
padding: 30px 0;
background: #111;
color: #EEE;
border-radius: 5px;
border: thin solid #444;
}
hr {
margin: 20px;
border: none;
border-bottom: thin solid rgba(255, 255, 255, .1);
}
div.title {
font-size: 2em;
}
h1 span {
font-weight: 300;
color: #Fd4;
}
div.stars {
width: 270px;
display: inline-block;
}
label.star {
float: right;
padding: 10px;
font-size: 36px;
color: #444;
transition: all .2s;
}
input.star:checked~label.star:before {
content: '\f005';
color: #FD4;
transition: all .25s;
}
input.star-5:checked~label.star:before {
color: #FE7;
text-shadow: 0 0 20px #952;
}
input.star-1:checked~label.star:before {
color: #F62;
}
label.star:hover {
transform: rotate(-15deg) scale(1.3);
}
label.star:before {
content: '\f006';
font-family: FontAwesome;
}
.rev-box {
/* height: 0; */
width: 100%;
transition: all .25s;
}
textarea.review {
background: #222;
border: none;
width: 50%;
max-width: 100%;
height: 50px;
padding: 10px;
box-sizing: border-box;
color: #EEE;
}
label.review {
display: block;
transition: opacity .25s;
}
input.star:checked~.rev-box {
height: 125px;
overflow: visible;
}
<html>
<head>
<link rel="stylesheet" href="startratecss.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/rateYo/2.2.0/jquery.rateyo.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/rateYo/2.2.0/jquery.rateyo.min.js"></script>
</head>
<body>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.2.0/css/font-awesome.min.css" />
<div class="cont">
<div class="stars">
<form>
<div class="rev-box">
<textarea class="review" id="review" cols="2" rows="2" name="review"></textarea>
</div>
<div id="rateYo"></div>
<input type="hidden" name="rating" id="rating_input" />
</form>
</div>
</div>
</body>
</html>

JQuery UI button style not appearing in Dialog box

The buttons inside a dialog box is not appearing in JQuery UI Style whereas the outside buttons are getting stylised.
Here is my piece of code where i think i'm doing wrong-
$("#addSection").button().click(function(){
$('#sectionDialog').dialog({
buttons:{
"Add New Section":function(){},
"Cancel": function(){}}
});
});
Inside Dialog Box-
Here is the problem
Outside Dialog Box-
Appering perfectly outside dialog box
Edit:
My HTML Code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Daily Tasks</title>
<!-- Scripts -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.0.0-beta1/dist/js/bootstrap.bundle.min.js" integrity="sha384-ygbV9kiqUc6oa4msXn9868pTtWMgiQaeYH7/t7LECLbyPA2x65Kgf80OJFdroafW" crossorigin="anonymous"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="jquery/external/jquery/jquery.js"></script>
<script src="jquery/jquery-ui.min.js"></script>
<!-- CSS Stylesheets -->
<link rel="stylesheet" href="jquery/jquery-ui.min.css">
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.0.0-beta1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-giJF6kkoqNQ00vy+HMDP7azOuL0xtbfIcaT9wjKHr8RbDVddVHyTfAAsrekwKmP1" crossorigin="anonymous">
<link rel="stylesheet" href="styles.css" />
</head>
<body>
<div class="container-fluid">
<h2>Daily Tasks</h2>
<hr width="100%" size="4">
<div class="addSection">
<button id="addSection">Add Section</button>
</div>
<div id="sections">
<ul id="main">
<li>Personal<span class='ui-icon ui-icon-close'></span></li>
<li>Work<span class='ui-icon ui-icon-close'></span></li>
</ul>
<ol id="personal">
</ol>
<ol id="work">
</ol>
</div>
<div class="addTask">
<button id="addTask">Add Task</button>
</div>
<div id="sectionDialog" title="Add a section">
<label for="section">Section Name:</label><input id="section" type="text">
</div>
<div id="taskDialog" title="Add a task">
<label for="task">Task Name:</label><input id="task" type="text">
</div>
</div>
<script src="index.js"></script>
</body>
</html>
My CSS Code:
body{
background-color: #19456b;
}
h2{
text-align: center;
color: #d89216;
font-family:'Times New Roman', Times, serif;
font-size: 2.4rem;
font-style: italic;
font-weight: 500;
margin: 10px 0;
}
hr{
margin: 0;
color: #d89216;
}
button:focus{outline:none !important;}
.container-fluid{
margin-top: 50px;
padding: 2px 15px;
width: 800px;
height: 600px;
border: 5px inset rgb(255,214,75);
background-color: blanchedalmond;
}
ol li{
padding: 2px;
cursor: grabbing;
}
ol li:hover{
background-color: #fad586;
border: 0.5px solid rgb(238, 148, 14);
}
.checkbox
{
margin: 0 5px 0 3px;
cursor: pointer;
}
.addSection
{
text-align: right;
margin: 12px 2px;
}
.addTask
{
text-align: right;
margin: 12px 2px;
}
#sectionDialog{
display: none;
}
#taskDialog{
display: none;
}
.ui-icon-close
{
margin-top: 0.5px;
margin-right: 3px;
transform: scale(1.5);
cursor: pointer;
}
Thanks is advance!

Consider adjusting your head like so:
<!-- CSS Stylesheets -->
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.0.0-beta1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-giJF6kkoqNQ00vy+HMDP7azOuL0xtbfIcaT9wjKHr8RbDVddVHyTfAAsrekwKmP1" crossorigin="anonymous">
<link rel="stylesheet" href="jquery/jquery-ui.min.css">
<link rel="stylesheet" href="styles.css" />
The order that they load in is important.
$(function() {
$("#addSection").button().click(function() {
$('#sectionDialog').dialog({
buttons: {
"Add New Section": function() {},
"Cancel": function() {}
}
});
});
});
body {
background-color: #19456b;
}
h2 {
text-align: center;
color: #d89216;
font-family: 'Times New Roman', Times, serif;
font-size: 2.4rem;
font-style: italic;
font-weight: 500;
margin: 10px 0;
}
hr {
margin: 0;
color: #d89216;
}
button:focus {
outline: none !important;
}
.container-fluid {
margin-top: 50px;
padding: 2px 15px;
width: 800px;
height: 600px;
border: 5px inset rgb(255, 214, 75);
background-color: blanchedalmond;
}
ol li {
padding: 2px;
cursor: grabbing;
}
ol li:hover {
background-color: #fad586;
border: 0.5px solid rgb(238, 148, 14);
}
.checkbox {
margin: 0 5px 0 3px;
cursor: pointer;
}
.addSection {
text-align: right;
margin: 12px 2px;
}
.addTask {
text-align: right;
margin: 12px 2px;
}
#sectionDialog {
display: none;
}
#taskDialog {
display: none;
}
.ui-icon-close {
margin-top: 0.5px;
margin-right: 3px;
transform: scale(1.5);
cursor: pointer;
}
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.0.0-beta1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-giJF6kkoqNQ00vy+HMDP7azOuL0xtbfIcaT9wjKHr8RbDVddVHyTfAAsrekwKmP1" crossorigin="anonymous">
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<script src="https://code.jquery.com/jquery-3.5.1.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<div class="container-fluid">
<h2>Daily Tasks</h2>
<hr width="100%" size="4">
<div class="addSection">
<button id="addSection">Add Section</button>
</div>
<div id="sections">
<ul id="main">
<li>Personal<span class='ui-icon ui-icon-close'></span></li>
<li>Work<span class='ui-icon ui-icon-close'></span></li>
</ul>
<ol id="personal">
</ol>
<ol id="work">
</ol>
</div>
<div class="addTask">
<button id="addTask">Add Task</button>
</div>
<div id="sectionDialog" title="Add a section">
<label for="section">Section Name:</label><input id="section" type="text">
</div>
<div id="taskDialog" title="Add a task">
<label for="task">Task Name:</label><input id="task" type="text">
</div>
</div>

My fadeOut function (animation) doesn't work

I have problem here;
$("#anan").click(function(){
$("input[type='text']").fadeToggle();
});
I would like my input box to disappear and appear with a fade effect. Currently, it only appears and disappears without a fading effect. Can someone help me as to why it doesn't fade in/out?
Note: In the preview, it doesn't even disappear/appear for some reason but when I actually run the html on Chrome it functions alright, except the fading animation.
$("ul").on("click", "li", function() {
$(this).toggleClass("completed");
});
$("ul").on("click", "span", function(event) {
$(this).parent().fadeOut(500, function() {
$(this).remove();
});
event.stopPropagation();
})
$("input[type ='text']").on("keypress", function(event) {
if (event.which === 13) {
var inputtext = $(this).val();
$(this).val("");
$("ul").append("<li><span><i class='fas fa-trash'></i></span> " + inputtext + "</li>")
}
})
$("#anan").click(function() {
$("input[type='text']").fadeToggle();
});
h1 {
background: #2980b9;
color: white;
margin: 0;
padding: 10px 20px;
text-transform: uppercase;
font-size: 24px;
font-weight: normal;
}
ul {
list-style: none;
margin: 0;
padding: 0;
}
.fa-plus {
float: right;
}
body {
background: #ff6e7f;
/* fallback for old browsers */
background: -webkit-linear-gradient(to right, #bfe9ff, #ff6e7f);
/* Chrome 10-25, Safari 5.1-6 */
background: linear-gradient(to right, #bfe9ff, #ff6e7f);
/* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
font-family: Roboto;
}
li {
background: #fff;
height: 40px;
line-height: 40px;
color: #666;
}
input {
font-size: 18px;
color: #2980b9;
background-color: #f7f7f7;
width: 100%;
box-sizing: border-box;
padding: 13px 13px 13px 20px;
border: 3px solid rgba(0, 0, 0, 0);
}
input:focus {
background: #fff;
border: 3px solid #2980b9;
outline: none;
}
li:nth-child(2n) {
background: #f7f7f7;
}
li span {
background: #e74c3c;
height: 40px;
margin-right: 20px;
text-align: center;
color: white;
width: 0;
display: inline-block;
transition: 0.2s linear;
opacity: 0;
}
li:hover span {
width: 40px;
opacity: 1.0;
}
#container {
width: 360px;
margin: 100px auto;
background: #f7f7f7;
box-shadow: 0 0 3px rgba(0, 0, 0, 0.1);
}
.completed {
color: gray;
text-decoration: line-through;
}
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title>ToDo List App</title>
<script type="text/javascript" src="assets/js/lib/jquery-3.3.1.min.js">
</script>
<link rel="stylesheet" type="text/css" href="assets/css/styles.css">
<link href="https://fonts.googleapis.com/css?family=Roboto:400,500,700" rel="stylesheet">
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.13/css/all.css" integrity="sha384-DNOHZ68U8hZfKXOrtjWvjxusGo9WQnrNx2sqG0tfsghAvtVlRW3tvkXWZh58N9jp" crossorigin="anonymous">
</head>
<body>
<div id="container">
<h1>To-Do List <span id="anan"><i class="fas fa-plus"></i></span></h1>
<input type="text">
<ul>
<li><span><i class="fas fa-trash"></i></span> Go to Potions Class</li>
<li><span><i class="fas fa-trash"></i></span> Buy new robes</li>
<li><span><i class="fas fa-trash"></i></span> Visit anan</li>
</ul>
</div>
<script type="text/javascript" src="assets/js/mycustom.js">
</script>
</body>
</html>

You are missing JQuery script:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
$("ul").on("click", "li", function(){
$(this).toggleClass("completed");
}
);
$("ul").on("click", "span", function(event){
$(this).parent().fadeOut(500, function(){
$(this).remove();
});
event.stopPropagation();
}
)
$("input[type ='text']").on("keypress", function(event){
if(event.which === 13) {
var inputtext = $(this).val();
$(this).val("");
$("ul").append("<li><span><i class='fas fa-trash'></i></span> "+ inputtext + "</li>")
}
})
$("#anan").click(function(){
$("input[type='text']").fadeToggle();
});
h1 {
background: #2980b9;
color:white;
margin: 0;
padding: 10px 20px;
text-transform: uppercase;
font-size: 24px;
font-weight: normal;
}
ul {
list-style: none;
margin: 0;
padding: 0;
}
.fa-plus{
float:right;
}
body {
background: #ff6e7f; /* fallback for old browsers */
background: -webkit-linear-gradient(to right, #bfe9ff, #ff6e7f); /* Chrome 10-25, Safari 5.1-6 */
background: linear-gradient(to right, #bfe9ff, #ff6e7f); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
font-family: Roboto;
}
li {
background: #fff;
height: 40px;
line-height: 40px;
color: #666;
}
input {
font-size: 18px;
color: #2980b9;
background-color: #f7f7f7;
width: 100%;
box-sizing: border-box;
padding: 13px 13px 13px 20px;
border: 3px solid rgba(0,0,0, 0);
}
input:focus{
background: #fff;
border: 3px solid #2980b9;
outline: none;
}
li:nth-child(2n){
background: #f7f7f7;
}
li span {
background: #e74c3c;
height: 40px;
margin-right: 20px;
text-align: center;
color: white;
width: 0;
display: inline-block;
transition: 0.2s linear;
opacity: 0;
}
li:hover span {
width: 40px;
opacity: 1.0;
}
#container {
width: 360px;
margin: 100px auto;
background: #f7f7f7;
box-shadow: 0 0 3px rgba(0,0,0, 0.1);
}
.completed {
color: gray;
text-decoration: line-through;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link rel="stylesheet" type="text/css" href="assets/css/styles.css">
<link href="https://fonts.googleapis.com/css?family=Roboto:400,500,700" rel="stylesheet">
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.13/css/all.css" integrity="sha384-DNOHZ68U8hZfKXOrtjWvjxusGo9WQnrNx2sqG0tfsghAvtVlRW3tvkXWZh58N9jp" crossorigin="anonymous">
<div id="container">
<h1>To-Do List <span id="anan"><i class="fas fa-plus"></i></span></h1>
<input type="text">
<ul>
<li><span><i class="fas fa-trash"></i></span> Go to Potions Class</li>
<li><span><i class="fas fa-trash"></i></span> Buy new robes</li>
<li><span><i class="fas fa-trash"></i></span> Visit anan</li>
</ul>
</div>
<script type="text/javascript" src="assets/js/mycustom.js">
</script>

in our codepen you have not included jquery and in your css that text box background is #f5f5f5 which is same as it's background.So you need to change text box's background color to see fade effect . Example you can set red for testing. In JS you are required to mention parameters on fadeToggle
$("input[type='text']").fadeToggle("2000", "linear");
Here, 2000 stands for 2second . You can increase as you wish. For more detail you are required to check document on http://api.jquery.com/fadetoggle/
I have edited on codepen : https://codepen.io/hirakumar/pen/aKpQNN?editors=0001

How to get jQuery to recognize mouse over image once per hover

I am trying to animate a picture when the mouse hovers over it. I am currently using "animate.css" to get the animation. There are two problems:
1) How do I get jQuery to "fire" my script once per hover? For example, if I create an alert, the alert will fire several times (putting the mouse over and taking it off).
2) What is wrong with my current jQuery syntax? The animation does not play.
HTML
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="CSS/stylesheet_test.css" rel="stylesheet" type="text/css">
<link rel="stylesheet" href="CSS/animate.css">
<link href="https://fonts.googleapis.com/css?family=Work+Sans:500&subset=latin-ext" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Raleway" rel="stylesheet">
<script type="text/javascript" src="scripts/jquery-3.1.1.min.js"></script>
<script type="text/javascript" src="scripts/test.js"></script>
<title>Daryl N.</title>
</head>
<body>
<div class="container">
<div class="navbar">
<div class="nav-text"><span id="home">Home</span><span id="archive">Archive</span></div>
</div>
<div id="first" class="background">
<div class="align-vert"><img id="me-pic" src="./images/me.jpg" alt="A picture of me is suppose to be here" style="width:240px;height:240px;" class="me-border animated bounceIn"><span class="daryl animated bounceIn">Hi, I'm Daryl</span></div>
</div>
<script type="text/javascript" src="scripts/test.js"></script>
<div id="second" class="background">
<p class="align-vert">This is my personal website</p>
</div>
</div>
</body>
</html>
JS
$(document).ready(function()
{
$('#me-pic').hover(function()
{
$(".bounceIn").toggleClass("bounce");
});
});
My CSS
body,html
{
width: 100%;
min-width: 200px;
height: 100%;
padding: 0;
margin: 0;
}
.container
{
width: 100%;
min-width: 500px;
height: 100%;
}
.background
{
height: 100%;
width: 100%;
display: inline-block;
position: relative;
z-index: 1;
}
.align-vert
{
text-align: center;
position: relative;
top: 50%;
transform: translateY(-50%);
}
.me-border
{
border-radius: 50%;
border: 2px solid #FFF;
vertical-align:middle
}
.navbar
{
position: fixed;
background-color: rgba(0, 0, 0, 0.9);
margin: 0;
padding: 0;
width: 100%;
height: 50px;
z-index: 2;
}
.nav-text
{
color: #a3a3a3;
font-family: 'Raleway', sans-serif;
font-weight: 600;
font-size: 16px;
text-align: center;
position: relative;
top: 50%;
transform: translateY(-50%);
}
#home
{
margin-right: 50px;
}
#home:hover
{
color: #777777;
}
#home a:hover, a:visited, a:link, a:active
{
text-decoration: none;
color: inherit;
}
#archive
{
margin-left: 50px;
}
#archive:hover
{
color: #777777;
}
.daryl
{
font-family: 'Work Sans', sans-serif;
display: inline-block;
padding-left: 20px;
font-size: 30px;
color: #FFF;
}
#first
{
background: #2C2D45;
}
#second
{
background: #354677;
font-size: 40px;
font-family: 'Work Sans', sans-serif;
color: white;
}
See here for animate.css
Could my CSS files cause a conflict?
Thanks in advance!

In your JS, I would instead use the mouseenter and mouseleave event handlers. Based on your explanation, this should serve nicely. It will fire exactly once when the mouse enters the div, and once when it leaves.
$(document).ready(function()
{
$('#me-pic').on('mouseenter', function() {
$(".bounceIn").toggleClass("bounce");
});
$('#me-pic').on('mouseleave', function() {
$(".bounceIn").toggleClass("bounce");
});
});