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How to Create Animations using Javascript | IAM Platform Tutorials

Learn how to create animations using JavaScript.


A Basic Web Page

To demonstrate how to create HTML animations with JavaScript, we can use a simple web page.

CODE:

<!DOCTYPE html>
<html>
<body><h1>My First JavaScript Animation</h1><div id =”myContainer”>
<div id =”myAnimation”>My animation will go here</div>
</div>

</body>
<html>


Styling the Elements

To make an animation possible, the animated element must be animated relative to a “parent container”.

The container element should be created with style = “position: relative”.

The animation element should be created with style = “position: absolute”.

CODE:

#myContainer {
width: 400px;
height: 400px;
position: relative;
background: yellow;
}
#myAnimation {
width: 50px;
height: 50px;
position: absolute;
background: red;
}

The Animation Code

JavaScript animations are done by programming gradual changes in an element’s style.

The changes are called by a timer. When the timer interval is small, the animation looks continuous.

The basic code is:

CODE:

var id = setInterval(frame, 5);

function frame() {
if (/* test for finished */) {
clearInterval(id);
} else {
/* code to change the element style */
}
}


Create the Animation Using JavaScript

CODE:

function myMove() {
var elem = document.getElementById(“myAnimation”);
var pos = 0;
var id = setInterval(frame, 10);
function frame() {
if (pos == 350) {
clearInterval(id);
} else {
pos++;
elem.style.top = pos + ‘px’;
elem.style.left = pos + ‘px’;
}
}
}

FULL CODE:

<!DOCTYPE html>
<html>
<style>
#myContainer {
width: 400px;
height: 400px;
position: relative;
background: yellow;
}
#myAnimation {
width: 50px;
height: 50px;
position: absolute;
background-color: red;
}
</style>
<body>

<p>
<button onclick=”myMove()”>Click Me</button>
</p>

<div id =”myContainer”>
<div id =”myAnimation”></div>
</div>

<script>
function myMove() {
var elem = document.getElementById(“myAnimation”);
var pos = 0;
var id = setInterval(frame, 10);
function frame() {
if (pos == 350) {
clearInterval(id);
} else {
pos++;
elem.style.top = pos + ‘px’;
elem.style.left = pos + ‘px’;
}
}
}
</script>

</body>
</html>


How to Create a Modal Box | IAM Platform Tutorials

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How To Create a Modal Box

A modal is a dialog box/popup window that is displayed on top of the current page:


Step 1) Add HTML:

CODE:

<!– Trigger/Open The Modal –>
<button id=”myBtn”>Open Modal</button><!– The Modal –>
<div id=”myModal” class=”modal”><!– Modal content –>
<div class=”modal-content”>
<span class=”close”>&times;</span>
<p>Some text in the Modal..</p>
</div></div>


Step 2) Add CSS:

CODE:

/* The Modal (background) */
.modal {
display: none; /* Hidden by default */
position: fixed; /* Stay in place */
z-index: 1; /* Sit on top */
left: 0;
top: 0;
width: 100%; /* Full width */
height: 100%; /* Full height */
overflow: auto; /* Enable scroll if needed */
background-color: rgb(0,0,0); /* Fallback color */
background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}/* Modal Content/Box */
.modal-content {
background-color: #fefefe;
margin: 15% auto; /* 15% from the top and centered */
padding: 20px;
border: 1px solid #888;
width: 80%; /* Could be more or less, depending on screen size */
}/* The Close Button */
.close {
color: #aaa;
float: right;
font-size: 28px;
font-weight: bold;
}.close:hover,
.close:focus {
color: black;
text-decoration: none;
cursor: pointer;
}


Step 3) Add JavaScript:

CODE:

// Get the modal
var modal = document.getElementById(‘myModal’);// Get the button that opens the modal
var btn = document.getElementById(“myBtn”);// Get the <span> element that closes the modal
var span = document.getElementsByClassName(“close”)[0];// When the user clicks on the button, open the modal
btn.onclick = function() {
modal.style.display = “block”;
}

// When the user clicks on <span> (x), close the modal
span.onclick = function() {
modal.style.display = “none”;
}

// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
if (event.target == modal) {
modal.style.display = “none”;
}
}


Add Header and Footer

Add a class for modal-header, modal-body and modal-footer:

CODE:

<!– Modal content –>
<div class=”modal-content”>
<div class=”modal-header”>
<span class=”close”>&times;</span>
<h2>Modal Header</h2>
</div>
<div class=”modal-body”>
<p>Some text in the Modal Body</p>
<p>Some other text…</p>
</div>
<div class=”modal-footer”>
<h3>Modal Footer</h3>
</div>
</div>

Style the modal header, body and footer, and add animation (slide in the modal):

CODE:

/* Modal Header */
.modal-header {
padding: 2px 16px;
background-color: #5cb85c;
color: white;
}/* Modal Body */
.modal-body {padding: 2px 16px;}/* Modal Footer */
.modal-footer {
padding: 2px 16px;
background-color: #5cb85c;
color: white;
}/* Modal Content */
.modal-content {
position: relative;
background-color: #fefefe;
margin: auto;
padding: 0;
border: 1px solid #888;
width: 80%;
box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2),0 6px 20px 0 rgba(0,0,0,0.19);
-webkit-animation-name: animatetop;
-webkit-animation-duration: 0.4s;
animation-name: animatetop;
animation-duration: 0.4s
}

/* Add Animation */
@-webkit-keyframes animatetop {
from {top: -300px; opacity: 0}
to {top: 0; opacity: 1}
}

@keyframes animatetop {
from {top: -300px; opacity: 0}
to {top: 0; opacity: 1}
}


FULL CODE:
<!DOCTYPE html>
<html>
<head>
<style>
/* The Modal (background) */
.modal {
display: none; /* Hidden by default */
position: fixed; /* Stay in place */
z-index: 1; /* Sit on top */
padding-top: 100px; /* Location of the box */
left: 0;
top: 0;
width: 100%; /* Full width */
height: 100%; /* Full height */
overflow: auto; /* Enable scroll if needed */
background-color: rgb(0,0,0); /* Fallback color */
background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}/* Modal Content */
.modal-content {
position: relative;
background-color: #fefefe;
margin: auto;
padding: 0;
border: 1px solid #888;
width: 80%;
box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2),0 6px 20px 0 rgba(0,0,0,0.19);
-webkit-animation-name: animatetop;
-webkit-animation-duration: 0.4s;
animation-name: animatetop;
animation-duration: 0.4s
}/* Add Animation */
@-webkit-keyframes animatetop {
from {top:-300px; opacity:0}
to {top:0; opacity:1}
}@keyframes animatetop {
from {top:-300px; opacity:0}
to {top:0; opacity:1}
}

/* The Close Button */
.close {
color: white;
float: right;
font-size: 28px;
font-weight: bold;
}

.close:hover,
.close:focus {
color: #000;
text-decoration: none;
cursor: pointer;
}

.modal-header {
padding: 2px 16px;
background-color: #5cb85c;
color: white;
}

.modal-body {padding: 2px 16px;}

.modal-footer {
padding: 2px 16px;
background-color: #5cb85c;
color: white;
}
</style>
</head>
<body>

<h2>Animated Modal with Header and Footer</h2>

<!– Trigger/Open The Modal –>
<button id=”myBtn”>Open Modal</button>

<!– The Modal –>
<div id=”myModal” class=”modal”>

<!– Modal content –>
<div class=”modal-content”>
<div class=”modal-header”>
<span class=”close”>&times;</span>
<h2>Modal Header</h2>
</div>
<div class=”modal-body”>
<p>Some text in the Modal Body</p>
<p>Some other text…</p>
</div>
<div class=”modal-footer”>
<h3>Modal Footer</h3>
</div>
</div>

</div>

<script>
// Get the modal
var modal = document.getElementById(‘myModal’);

// Get the button that opens the modal
var btn = document.getElementById(“myBtn”);

// Get the <span> element that closes the modal
var span = document.getElementsByClassName(“close”)[0];

// When the user clicks the button, open the modal
btn.onclick = function() {
modal.style.display = “block”;
}

// When the user clicks on <span> (x), close the modal
span.onclick = function() {
modal.style.display = “none”;
}

// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
if (event.target == modal) {
modal.style.display = “none”;
}
}
</script>

</body>
</html>


Bottom Modal (“Bottom sheets”)

An example on how to create a full-width modal that slides in from the bottom:

CODE:

<!DOCTYPE html>
<html>
<head>
<style>
/* The Modal (background) */
.modal {
display: none; /* Hidden by default */
position: fixed; /* Stay in place */
z-index: 1; /* Sit on top */
left: 0;
top: 0;
width: 100%; /* Full width */
height: 100%; /* Full height */
overflow: auto; /* Enable scroll if needed */
background-color: rgb(0,0,0); /* Fallback color */
background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
-webkit-animation-name: fadeIn; /* Fade in the background */
-webkit-animation-duration: 0.4s;
animation-name: fadeIn;
animation-duration: 0.4s
}

/* Modal Content */
.modal-content {
position: fixed;
bottom: 0;
background-color: #fefefe;
width: 100%;
-webkit-animation-name: slideIn;
-webkit-animation-duration: 0.4s;
animation-name: slideIn;
animation-duration: 0.4s
}

/* The Close Button */
.close {
color: white;
float: right;
font-size: 28px;
font-weight: bold;
}

.close:hover,
.close:focus {
color: #000;
text-decoration: none;
cursor: pointer;
}

.modal-header {
padding: 2px 16px;
background-color: #5cb85c;
color: white;
}

.modal-body {padding: 2px 16px;}

.modal-footer {
padding: 2px 16px;
background-color: #5cb85c;
color: white;
}

/* Add Animation */
@-webkit-keyframes slideIn {
from {bottom: -300px; opacity: 0}
to {bottom: 0; opacity: 1}
}

@keyframes slideIn {
from {bottom: -300px; opacity: 0}
to {bottom: 0; opacity: 1}
}

@-webkit-keyframes fadeIn {
from {opacity: 0}
to {opacity: 1}
}

@keyframes fadeIn {
from {opacity: 0}
to {opacity: 1}
}
</style>
</head>
<body>

<h2>Bottom Modal</h2>

<!– Trigger/Open The Modal –>
<button id=”myBtn”>Open Modal</button>

<!– The Modal –>
<div id=”myModal” class=”modal”>

<!– Modal content –>
<div class=”modal-content”>
<div class=”modal-header”>
<span class=”close”>&times;</span>
<h2>Modal Header</h2>
</div>
<div class=”modal-body”>
<p>Some text in the Modal Body</p>
<p>Some other text…</p>
</div>
<div class=”modal-footer”>
<h3>Modal Footer</h3>
</div>
</div>

</div>

<script>
// Get the modal
var modal = document.getElementById(‘myModal’);

// Get the button that opens the modal
var btn = document.getElementById(“myBtn”);

// Get the <span> element that closes the modal
var span = document.getElementsByClassName(“close”)[0];

// When the user clicks the button, open the modal
btn.onclick = function() {
modal.style.display = “block”;
}

// When the user clicks on <span> (x), close the modal
span.onclick = function() {
modal.style.display = “none”;
}

// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
if (event.target == modal) {
modal.style.display = “none”;
}
}
</script>

</body>
</html>


VIEW WORKING MODALS HERE

Continue reading “How to Create a Modal Box | IAM Platform Tutorials”

How to create a slideshow | IAM Platform Tutorials

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Learn how to create a Slideshow with CSS and JavaScript.


Slideshow / Carousel

A slideshow is used to cycle through elements


Create A Slideshow

Step 1) Add HTML:

Example

<div class=”slideshow-container”>
<div class=”mySlides fade”>
<div class=”numbertext”>1 / 3</div>
<img src=”img1.jpg” style=”width:100%”>
<div class=”text”>Caption Text</div>
</div><div class=”mySlides fade”>
<div class=”numbertext”>2 / 3</div>
<img src=”img2.jpg” style=”width:100%”>
<div class=”text”>Caption Two</div>
</div><div class=”mySlides fade”>
<div class=”numbertext”>3 / 3</div>
<img src=”img3.jpg” style=”width:100%”>
<div class=”text”>Caption Three</div>
</div><a class=”prev” onclick=”plusSlides(-1)”>&#10094;</a>
<a class=”next” onclick=”plusSlides(1)”>&#10095;</a>
</div>
<br><div style=”text-align:center”>
<span class=”dot” onclick=”currentSlide(1)”></span>
<span class=”dot” onclick=”currentSlide(2)”></span>
<span class=”dot” onclick=”currentSlide(3)”></span>
</div>

Step 2) Add CSS:

Style the next and previous buttons, the caption text and the dots:

Example

/* Slideshow container */
.slideshow-container {
max-width: 1000px;
position: relative;
margin: auto;
}/* Next & previous buttons */
.prev, .next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
margin-top: -22px;
padding: 16px;
color: white;
font-weight: bold;
font-size: 18px;
transition: 0.6s ease;
border-radius: 0 3px 3px 0;
}/* Position the “next button” to the right */
.next {
right: 0;
border-radius: 3px 0 0 3px;
}/* On hover, add a black background color with a little bit see-through */
.prev:hover, .next:hover {
background-color: rgba(0,0,0,0.8);
}/* Caption text */
.text {
color: #f2f2f2;
font-size: 15px;
padding: 8px 12px;
position: absolute;
bottom: 8px;
width: 100%;
text-align: center;
}/* Number text (1/3 etc) */
.numbertext {
color: #f2f2f2;
font-size: 12px;
padding: 8px 12px;
position: absolute;
top: 0;
}

/* The dots/bullets/indicators */
.dot {
cursor:pointer;
height: 13px;
width: 13px;
margin: 0 2px;
background-color: #bbb;
border-radius: 50%;
display: inline-block;
transition: background-color 0.6s ease;
}

.active, .dot:hover {
background-color: #717171;
}

/* Fading animation */
.fade {
-webkit-animation-name: fade;
-webkit-animation-duration: 1.5s;
animation-name: fade;
animation-duration: 1.5s;
}

@-webkit-keyframes fade {
from {opacity: .4}
to {opacity: 1}
}

@keyframes fade {
from {opacity: .4}
to {opacity: 1}
}


Step 3) Add JavaScript:

Example

var slideIndex = 1;
showSlides(slideIndex);function plusSlides(n) {
showSlides(slideIndex += n);
}function currentSlide(n) {
showSlides(slideIndex = n);
}function showSlides(n) {
var i;
var slides = document.getElementsByClassName(“mySlides”);
var dots = document.getElementsByClassName(“dot”);
if (n > slides.length) {slideIndex = 1}
if (n < 1) {slideIndex = slides.length}
for (i = 0; i < slides.length; i++) {
slides[i].style.display = “none”;
}
for (i = 0; i < dots.length; i++) {
dots[i].className = dots[i].className.replace(” active”, “”);
}
slides[slideIndex-1].style.display = “block”;
dots[slideIndex-1].className += ” active”;
}

Automatic Slideshow

To display an automatic slideshow, use the following code:

Example

var slideIndex = 0;
showSlides();function showSlides() {
var i;
var slides = document.getElementsByClassName(“mySlides”);
for (i = 0; i < slides.length; i++) {
slides[i].style.display = “none”;
}
slideIndex++;
if (slideIndex> slides.length) {slideIndex = 1}
slides[slideIndex-1].style.display = “block”;
setTimeout(showSlides, 2000); // Change image every 2 seconds
}

Watch a cool video on how to create a slideshow using CSS, HTML and Javascript

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Continue reading “How to create a slideshow | IAM Platform Tutorials”