JQuery Effects
jQuery is a powerful JavaScript library that simplifies HTML document traversing, event handling, and animating. One of its most compelling features is the ability to create smooth, animated effects with minimal code. This chapter will provide a comprehensive overview of jQuery effects, from basic to advanced techniques. By the end of this chapter, you'll have a solid understanding of how to use jQuery to enhance the user experience with engaging animations and effects.
Basic Effects
Showing and Hiding Elements
.show() and .hide()
The .show() method displays the selected elements if they are hidden.
<!DOCTYPE html>
<html>
<head>
<title>Show and Hide Example</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <script type="litespeed/javascript">$(document).ready(function(){$("#show").click(function(){$("p").show()});$("#hide").click(function(){$("p").hide()})})</script> </head>
<body>
<button id="show">Show</button>
<button id="hide">Hide</button>
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</html>
Explanation:
- We include jQuery from a CDN.
- Two buttons with IDs
showandhide. - A paragraph to be shown or hidden.
- jQuery’s
$(document).ready()function ensures the DOM is fully loaded before running the code. $("#show").click()and$("#hide").click()bind click events to the buttons.- The
show()method displays the paragraph, andhide()hides it.
Output:
- Clicking “Show” displays the paragraph.
- Clicking “Hide” hides the paragraph.
Toggling Visibility
.toggle()
The .toggle() method toggles the visibility of selected elements.
<!DOCTYPE html>
<html>
<head>
<title>Toggle Example</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <script type="litespeed/javascript">$(document).ready(function(){$("#toggle").click(function(){$("p").toggle()})})</script> </head>
<body>
<button id="toggle">Toggle</button>
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</html>
Explanation:
- A button with ID
toggle. - The
toggle()method toggles the paragraph’s visibility each time the button is clicked.
Output:
- Clicking “Toggle” alternates between showing and hiding the paragraph.
Fading Effects
.fadeIn(), .fadeOut(), and .fadeToggle()
These methods fade elements in and out of visibility.
<!DOCTYPE html>
<html>
<head>
<title>Fade Example</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <script type="litespeed/javascript">$(document).ready(function(){$("#fadeIn").click(function(){$("p").fadeIn()});$("#fadeOut").click(function(){$("p").fadeOut()});$("#fadeToggle").click(function(){$("p").fadeToggle()})})</script> </head>
<body>
<button id="fadeIn">Fade In</button>
<button id="fadeOut">Fade Out</button>
<button id="fadeToggle">Fade Toggle</button>
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</html>
Explanation:
- Three buttons for fading in, fading out, and toggling the fade.
- The paragraph is initially hidden with
style="display:none;". fadeIn(),fadeOut(), andfadeToggle()methods control the fading effects.
Output:
- Clicking “Fade In” makes the paragraph appear with a fading effect.
- Clicking “Fade Out” makes it disappear with a fading effect.
- Clicking “Fade Toggle” alternates the fade effect.
Sliding Effects
.slideDown(), .slideUp(), and .slideToggle()
These methods create sliding animations for showing and hiding elements.
<!DOCTYPE html>
<html>
<head>
<title>Slide Example</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <script type="litespeed/javascript">$(document).ready(function(){$("#slideDown").click(function(){$("p").slideDown()});$("#slideUp").click(function(){$("p").slideUp()});$("#slideToggle").click(function(){$("p").slideToggle()})})</script> </head>
<body>
<button id="slideDown">Slide Down</button>
<button id="slideUp">Slide Up</button>
<button id="slideToggle">Slide Toggle</button>
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</html>
Explanation:
- Similar setup as the fading example but with sliding effects.
slideDown(),slideUp(), andslideToggle()methods control the sliding animations.
Output:
- Clicking “Slide Down” slides the paragraph down into view.
- Clicking “Slide Up” slides it up out of view.
- Clicking “Slide Toggle” alternates the slide effect.
Custom Animations
The .animate() Method
The .animate() method allows you to create custom animations.
<!DOCTYPE html>
<html>
<head>
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background-color: red;
width: 100px;
height: 100px;
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<body>
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d=document.createElement("script");d.addEventListener("load",e),d.addEventListener("error",e),t.getAttributeNames().forEach(e=>{"type"!=e&&d.setAttribute("data-src"==e?"src":e,t.getAttribute(e))});let a=!(d.type="text/javascript");!d.src&&t.textContent&&(d.src=litespeed_inline2src(t.textContent),a=!0),t.after(d),t.remove(),a&&e()}function litespeed_inline2src(t){try{var d=urlCreator.createObjectURL(new Blob([t.replace(/^(?:<!--)?(.*?)(?:-->)?$/gm,"$1")],{type:"text/javascript"}))}catch(e){d="data:text/javascript;base64,"+btoa(t.replace(/^(?:<!--)?(.*?)(?:-->)?$/gm,"$1"))}return d}</script></body>
</html>
Explanation:
- A button with ID
animate. - A red
divpositioned absolutely with initial dimensions. - The
.animate()method changes thediv‘s position, opacity, height, and width.
Output:
- Clicking “Animate” moves the
divto the right, reduces opacity, and increases size.
Animation Queue
Animations in jQuery are placed in a queue to be executed sequentially.
<!DOCTYPE html>
<html>
<head>
<title>Animation Queue Example</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <script type="litespeed/javascript">$(document).ready(function(){$("#start").click(function(){var div=$("div");div.animate({height:'300px',opacity:'0.4'},"slow");div.animate({width:'300px',opacity:'0.8'},"slow");div.animate({height:'100px',opacity:'0.4'},"slow");div.animate({width:'100px',opacity:'0.8'},"slow")})})</script> <style>div {
background-color: red;
width: 100px;
height: 100px;
}</style></head>
<body>
<button id="start">Start Animation</button>
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d=document.createElement("script");d.addEventListener("load",e),d.addEventListener("error",e),t.getAttributeNames().forEach(e=>{"type"!=e&&d.setAttribute("data-src"==e?"src":e,t.getAttribute(e))});let a=!(d.type="text/javascript");!d.src&&t.textContent&&(d.src=litespeed_inline2src(t.textContent),a=!0),t.after(d),t.remove(),a&&e()}function litespeed_inline2src(t){try{var d=urlCreator.createObjectURL(new Blob([t.replace(/^(?:<!--)?(.*?)(?:-->)?$/gm,"$1")],{type:"text/javascript"}))}catch(e){d="data:text/javascript;base64,"+btoa(t.replace(/^(?:<!--)?(.*?)(?:-->)?$/gm,"$1"))}return d}</script></body>
</html>
Explanation:
- Four sequential animations change the
div‘s height, width, and opacity in sequence. - Animations are queued and executed one after the other.
Output:
- Clicking “Start Animation” executes the animations in sequence.
Advanced Effects
Easing Functions
Easing functions control the speed of animations.
<!DOCTYPE html>
<html>
<head>
<title>Easing Example</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <script type="litespeed/javascript" data-src="https://cdnjs.cloudflare.com/ajax/libs/jquery-easing/1.4.1/jquery.easing.min.js"></script> <script type="litespeed/javascript">$(document).ready(function(){$("#easeIn").click(function(){$("div").animate({left:'250px'},1000,'easeInQuad')});$("#easeOut").click(function(){$("div").animate({left:'0px'},1000,'easeOutQuad')})})</script> <style>div {
position: absolute;
background-color: red;
width: 100px;
height: 100px;
}</style></head>
<body>
<button id="easeIn">Ease In</button>
<button id="easeOut">Ease Out</button>
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Explanation:
- The
jquery-easingplugin is included for additional easing functions. - Two buttons for easing in and easing out.
- The
animate()method useseaseInQuadandeaseOutQuadeasing functions.
Output:
- Clicking “Ease In” moves the
divwith an accelerating effect. - Clicking “Ease Out” moves it back with a decelerating effect.
Custom Queue Functions
You can create custom functions to manage animation queues.
<!DOCTYPE html>
<html>
<head>
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background-color: red;
width: 100px;
height: 100px;
}</style></head>
<body>
<button id="start">Start Animation</button>
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</html>
Explanation:
- Custom functions in the queue change the
div‘s background color. next()is called to proceed to the next function in the queue.
Output:
- Clicking “Start Animation” changes the
div‘s background color and size in sequence.
Stopping Animations
The .stop() method stops ongoing animations.
<!DOCTYPE html>
<html>
<head>
<title>Stop Animation Example</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <script type="litespeed/javascript">$(document).ready(function(){$("#start").click(function(){$("div").animate({left:'250px'},5000)});$("#stop").click(function(){$("div").stop()})})</script> <style>div {
position: absolute;
background-color: red;
width: 100px;
height: 100px;
}</style></head>
<body>
<button id="start">Start Animation</button>
<button id="stop">Stop Animation</button>
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</html>
Explanation:
- Two buttons for starting and stopping the animation.
stop()method stops the animation immediately.
Output:
- Clicking “Start Animation” moves the
divto the right over 5 seconds. - Clicking “Stop Animation” stops the animation immediately.
Practical Examples
Image Gallery
Creating a simple image gallery with fading effects.
<!DOCTYPE html>
<html>
<head>
<title>Image Gallery</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <style>#gallery img {
display: none;
width: 100%;
height: auto;
}</style> <script type="litespeed/javascript">$(document).ready(function(){let current=0;const images=$("#gallery img");const total=images.length;function showImage(index){images.fadeOut().eq(index).fadeIn()}
$("#next").click(function(){current=(current+1)%total;showImage(current)});$("#prev").click(function(){current=(current-1+total)%total;showImage(current)});showImage(current)})</script> </head>
<body>
<button id="prev">Previous</button>
<button id="next">Next</button>
<div id="gallery">
<img data-lazyloaded="1" src="data:image/gif;base64,R0lGODdhAQABAPAAAMPDwwAAACwAAAAAAQABAAACAkQBADs=" decoding="async" data-src="image1.jpg" alt="Image 1">
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Explanation:
- Images are initially hidden with
display: none. showImage()function shows the current image with fading effect.- Buttons to navigate to the next and previous images.
Output:
- Clicking “Next” and “Previous” navigates through images with a fade effect.
Form Validation Feedback
Providing feedback for form validation using sliding effects.
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<html>
<head>
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</html>
Explanation:
- Feedback messages are initially hidden.
- Form validation checks if fields are empty.
- Sliding effect is used to show feedback messages.
Output:
- Submitting an empty form slides down the feedback messages.
Dynamic Content Loading
Using AJAX to load content dynamically with a fading effect.
<!DOCTYPE html>
<html>
<head>
<title>Dynamic Content Loading</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <script type="litespeed/javascript">$(document).ready(function(){$("#loadContent").click(function(){$("#content").fadeOut(function(){$(this).load("content.html",function(){$(this).fadeIn()})})})})</script> </head>
<body>
<button id="loadContent">Load Content</button>
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d=document.createElement("script");d.addEventListener("load",e),d.addEventListener("error",e),t.getAttributeNames().forEach(e=>{"type"!=e&&d.setAttribute("data-src"==e?"src":e,t.getAttribute(e))});let a=!(d.type="text/javascript");!d.src&&t.textContent&&(d.src=litespeed_inline2src(t.textContent),a=!0),t.after(d),t.remove(),a&&e()}function litespeed_inline2src(t){try{var d=urlCreator.createObjectURL(new Blob([t.replace(/^(?:<!--)?(.*?)(?:-->)?$/gm,"$1")],{type:"text/javascript"}))}catch(e){d="data:text/javascript;base64,"+btoa(t.replace(/^(?:<!--)?(.*?)(?:-->)?$/gm,"$1"))}return d}</script></body>
</html>
Explanation:
- A button to load content.
load()method loads content fromcontent.html.- Fading effect used while loading and displaying the content.
Output:
- Clicking “Load Content” fades out current content, loads new content, and fades it in.
jQuery provides a powerful set of tools for creating rich, interactive web pages with various effects. From simple show/hide operations to complex animations, jQuery makes it easy to enhance user experience. By understanding and utilizing these effects, you can create dynamic and engaging web applications that captivate users and improve overall interaction.Happy coding !❤️