Managing Dimensions with JQuery
Managing dimensions (width and height) of HTML elements is a crucial aspect of creating dynamic, responsive web applications. jQuery provides a straightforward way to handle these properties, making it easier for developers to manipulate element sizes programmatically.
Introduction
Managing the dimensions of HTML elements is essential for responsive design, ensuring that elements adapt correctly to different screen sizes and orientations. jQuery offers methods to get and set the width and height of elements, making it easy to dynamically adjust the layout of your web page.
Basic Methods for Dimensions
Managing the dimensions of HTML elements is essential for responsive design, ensuring that elements adapt correctly to different screen sizes and orientations. jQuery offers methods to get and set the width and height of elements, making it easy to dynamically adjust the layout of your web page.
Getting Dimensions
jQuery provides methods to get the width and height of elements.
width()
The .width() method gets the current computed width of the first element in the set of matched elements.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Get Width Example</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> </head>
<body>
<div id="box" style="width: 200px; height: 100px; background-color: lightblue;"></div>
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</html>
Explanation:
- When the button is clicked, the width of the
#boxelement is retrieved and displayed in an alert box.
Output:
- Clicking the “Get Width” button will show an alert box with the width of the
#boxelement, which is 200px.
height()
The .height() method gets the current computed height of the first element in the set of matched elements.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Get Height Example</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> </head>
<body>
<div id="box" style="width: 200px; height: 100px; background-color: lightblue;"></div>
<button id="getHeight">Get Height</button> <script type="litespeed/javascript">$(document).ready(function(){$("#getHeight").click(function(){alert("Height: "+$("#box").height()+"px")})})</script> <script data-no-optimize="1">window.lazyLoadOptions=Object.assign({},{threshold:300},window.lazyLoadOptions||{});!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).LazyLoad=e()}(this,function(){"use strict";function e(){return(e=Object.assign||function(t){for(var e=1;e<arguments.length;e++){var n,a=arguments[e];for(n in a)Object.prototype.hasOwnProperty.call(a,n)&&(t[n]=a[n])}return t}).apply(this,arguments)}function o(t){return e({},at,t)}function l(t,e){return t.getAttribute(gt+e)}function c(t){return l(t,vt)}function s(t,e){return function(t,e,n){e=gt+e;null!==n?t.setAttribute(e,n):t.removeAttribute(e)}(t,vt,e)}function i(t){return s(t,null),0}function r(t){return null===c(t)}function u(t){return c(t)===_t}function d(t,e,n,a){t&&(void 0===a?void 0===n?t(e):t(e,n):t(e,n,a))}function f(t,e){et?t.classList.add(e):t.className+=(t.className?" 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document.createElement("p"),nt=Y&&1<window.devicePixelRatio,at={elements_selector:".lazy",container:Z||Y?document:null,threshold:300,thresholds:null,data_src:"src",data_srcset:"srcset",data_sizes:"sizes",data_bg:"bg",data_bg_hidpi:"bg-hidpi",data_bg_multi:"bg-multi",data_bg_multi_hidpi:"bg-multi-hidpi",data_poster:"poster",class_applied:"applied",class_loading:"litespeed-loading",class_loaded:"litespeed-loaded",class_error:"error",class_entered:"entered",class_exited:"exited",unobserve_completed:!0,unobserve_entered:!1,cancel_on_exit:!0,callback_enter:null,callback_exit:null,callback_applied:null,callback_loading:null,callback_loaded:null,callback_error:null,callback_finish:null,callback_cancel:null,use_native:!1},ot="src",it="srcset",rt="sizes",ct="poster",lt="llOriginalAttrs",st="loading",ut="loaded",dt="applied",ft="error",_t="native",gt="data-",vt="ll-status",bt=[st,ut,dt,ft],pt=[ot],ht=[ot,ct],mt=[ot,it,rt],Et={IMG:function(t,e){h(t,function(t){y(t,mt),O(t,e)}),y(t,mt),O(t,e)},IFRAME:function(t,e){y(t,pt),A(t,ot,l(t,e.data_src))},VIDEO:function(t,e){a(t,function(t){y(t,pt),A(t,ot,l(t,e.data_src))}),y(t,ht),A(t,ct,l(t,e.data_poster)),A(t,ot,l(t,e.data_src)),t.load()}},It=["IMG","IFRAME","VIDEO"],yt={IMG:j,IFRAME:function(t){L(t,pt)},VIDEO:function(t){a(t,function(t){L(t,pt)}),L(t,ht),t.load()}},Lt=["IMG","IFRAME","VIDEO"];return t.prototype={update:function(t){var e,n,a,o=this._settings,i=W(t,o);{if(p(this,i.length),!Z&&tt)return q(o)?(e=o,n=this,i.forEach(function(t){-1!==Lt.indexOf(t.tagName)&&S(t,e,n)}),void p(n,0)):(t=this._observer,o=i,t.disconnect(),a=t,void o.forEach(function(t){a.observe(t)}));this.loadAll(i)}},destroy:function(){this._observer&&this._observer.disconnect(),K(this._settings).forEach(function(t){I(t)}),delete this._observer,delete this._settings,delete this.loadingCount,delete this.toLoadCount},loadAll:function(t){var e=this,n=this._settings;W(t,n).forEach(function(t){v(t,e),D(t,n,e)})},restoreAll:function(){var e=this._settings;K(e).forEach(function(t){P(t,e)})}},t.load=function(t,e){e=o(e);D(t,e)},t.resetStatus=function(t){i(t)},t}),function(t,e){"use strict";function n(){e.body.classList.add("litespeed_lazyloaded")}function a(){console.log("[LiteSpeed] Start Lazy Load"),o=new 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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,"$1"))}return d}</script><script data-optimized="1" type="litespeed/javascript" data-src="https://diginode.in/wp-content/litespeed/js/5ad5da7e80e1ecf64f3d75c5dab7ddb4.js?ver=8169a"></script></body>
</html>
Explanation:
- When the button is clicked, the height of the
#boxelement is retrieved and displayed in an alert box.
Output:
- Clicking the “Get Height” button will show an alert box with the height of the
#boxelement, which is 100px.
Setting Dimensions
jQuery allows you to set the width and height of elements using the .width() and .height() methods.
.width(value)
The .width(value) method sets the width of each element in the set of matched elements.
Example:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Set Width Example</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> </head>
<body>
<div id="box" style="width: 200px; height: 100px; background-color: lightblue;"></div>
<button id="setWidth">Set Width</button> <script type="litespeed/javascript">$(document).ready(function(){$("#setWidth").click(function(){$("#box").width(300)})})</script> <script data-no-optimize="1">window.lazyLoadOptions=Object.assign({},{threshold:300},window.lazyLoadOptions||{});!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).LazyLoad=e()}(this,function(){"use strict";function e(){return(e=Object.assign||function(t){for(var e=1;e<arguments.length;e++){var n,a=arguments[e];for(n in a)Object.prototype.hasOwnProperty.call(a,n)&&(t[n]=a[n])}return t}).apply(this,arguments)}function o(t){return e({},at,t)}function l(t,e){return t.getAttribute(gt+e)}function c(t){return l(t,vt)}function s(t,e){return function(t,e,n){e=gt+e;null!==n?t.setAttribute(e,n):t.removeAttribute(e)}(t,vt,e)}function i(t){return s(t,null),0}function r(t){return null===c(t)}function u(t){return c(t)===_t}function d(t,e,n,a){t&&(void 0===a?void 0===n?t(e):t(e,n):t(e,n,a))}function f(t,e){et?t.classList.add(e):t.className+=(t.className?" 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IntersectionObserver(function(t){H(t,e,n)},{root:(t=e).container===document?null:t.container,rootMargin:t.thresholds||t.threshold+"px"}))}function J(t){return Array.prototype.slice.call(t)}function K(t){return t.container.querySelectorAll(t.elements_selector)}function Q(t){return c(t)===ft}function W(t,e){return e=t||K(e),J(e).filter(r)}function X(e,t){var n;(n=K(e),J(n).filter(Q)).forEach(function(t){_(t,e.class_error),i(t)}),t.update()}function t(t,e){var n,a,t=o(t);this._settings=t,this.loadingCount=0,B(t,this),n=t,a=this,Y&&window.addEventListener("online",function(){X(n,a)}),this.update(e)}var Y="undefined"!=typeof window,Z=Y&&!("onscroll"in window)||"undefined"!=typeof navigator&&/(gle|ing|ro)bot|crawl|spider/i.test(navigator.userAgent),tt=Y&&"IntersectionObserver"in window,et=Y&&"classList"in document.createElement("p"),nt=Y&&1<window.devicePixelRatio,at={elements_selector:".lazy",container:Z||Y?document:null,threshold:300,thresholds:null,data_src:"src",data_srcset:"srcset",data_sizes:"sizes",data_bg:"bg",data_bg_hidpi:"bg-hidpi",data_bg_multi:"bg-multi",data_bg_multi_hidpi:"bg-multi-hidpi",data_poster:"poster",class_applied:"applied",class_loading:"litespeed-loading",class_loaded:"litespeed-loaded",class_error:"error",class_entered:"entered",class_exited:"exited",unobserve_completed:!0,unobserve_entered:!1,cancel_on_exit:!0,callback_enter:null,callback_exit:null,callback_applied:null,callback_loading:null,callback_loaded:null,callback_error:null,callback_finish:null,callback_cancel:null,use_native:!1},ot="src",it="srcset",rt="sizes",ct="poster",lt="llOriginalAttrs",st="loading",ut="loaded",dt="applied",ft="error",_t="native",gt="data-",vt="ll-status",bt=[st,ut,dt,ft],pt=[ot],ht=[ot,ct],mt=[ot,it,rt],Et={IMG:function(t,e){h(t,function(t){y(t,mt),O(t,e)}),y(t,mt),O(t,e)},IFRAME:function(t,e){y(t,pt),A(t,ot,l(t,e.data_src))},VIDEO:function(t,e){a(t,function(t){y(t,pt),A(t,ot,l(t,e.data_src))}),y(t,ht),A(t,ct,l(t,e.data_poster)),A(t,ot,l(t,e.data_src)),t.load()}},It=["IMG","IFRAME","VIDEO"],yt={IMG:j,IFRAME:function(t){L(t,pt)},VIDEO:function(t){a(t,function(t){L(t,pt)}),L(t,ht),t.load()}},Lt=["IMG","IFRAME","VIDEO"];return 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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,"$1"))}return d}</script><script data-optimized="1" type="litespeed/javascript" data-src="https://diginode.in/wp-content/litespeed/js/5ad5da7e80e1ecf64f3d75c5dab7ddb4.js?ver=8169a"></script></body>
</html>
Explanation:
- When the button is clicked, the width of the
#boxelement is set to 300px.
Output:
- Initially, the
#boxelement is 200px wide. - After clicking the “Set Width” button, the
#boxelement’s width changes to 300px.
.height(value)
The .height(value) method sets the height of each element in the set of matched elements.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Set Height Example</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> </head>
<body>
<div id="box" style="width: 200px; height: 100px; background-color: lightblue;"></div>
<button id="setHeight">Set Height</button> <script type="litespeed/javascript">$(document).ready(function(){$("#setHeight").click(function(){$("#box").height(150)})})</script> <script data-no-optimize="1">window.lazyLoadOptions=Object.assign({},{threshold:300},window.lazyLoadOptions||{});!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).LazyLoad=e()}(this,function(){"use strict";function e(){return(e=Object.assign||function(t){for(var e=1;e<arguments.length;e++){var n,a=arguments[e];for(n in a)Object.prototype.hasOwnProperty.call(a,n)&&(t[n]=a[n])}return t}).apply(this,arguments)}function o(t){return e({},at,t)}function l(t,e){return t.getAttribute(gt+e)}function c(t){return l(t,vt)}function s(t,e){return function(t,e,n){e=gt+e;null!==n?t.setAttribute(e,n):t.removeAttribute(e)}(t,vt,e)}function i(t){return s(t,null),0}function r(t){return null===c(t)}function u(t){return c(t)===_t}function d(t,e,n,a){t&&(void 0===a?void 0===n?t(e):t(e,n):t(e,n,a))}function f(t,e){et?t.classList.add(e):t.className+=(t.className?" 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</html>
Explanation:
- When the button is clicked, the height of the
#boxelement is set to 150px.
Output:
- Initially, the
#boxelement is 100px tall. - After clicking the “Set Height” button, the
#boxelement’s height changes to 150px.
Advanced Dimension Management
Inner and Outer Dimensions
innerWidth()
The .innerWidth() method gets the current computed width for the first element, including padding but not border.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Get Inner Width Example</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <style>#box {
width: 200px;
padding: 20px;
border: 5px solid black;
}</style></head>
<body>
<div id="box" style="height: 100px; background-color: lightblue;"></div>
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</html>
Explanation:
- When the button is clicked, the inner width of the
#boxelement is retrieved and displayed in an alert box.
Output:
- Clicking the “Get Inner Width” button will show an alert box with the inner width of the
#boxelement, which includes the width and padding, but not the border.
outerWidth(includeMargin)
The .outerWidth(includeMargin) method gets the current computed width for the first element, including padding and border, and optionally margin if includeMargin is true.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Get Outer Width Example</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <style>#box {
width: 200px;
padding: 20px;
border: 5px solid black;
margin: 10px;
}</style></head>
<body>
<div id="box" style="height: 100px; background-color: lightblue;"></div>
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</html>
Explanation:
- When the button is clicked, the outer width of the
#boxelement, including padding, border, and margin, is retrieved and displayed in an alert box.
Output:
- Clicking the “Get Outer Width” button will show an alert box with the outer width of the
#boxelement, which includes the width, padding, border, and margin.
Including Padding, Border, and Margin
innerHeight()
The .innerHeight() method gets the current computed height for the first element, including padding but not border.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Get Inner Height Example</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <style>#box {
height: 100px;
padding: 20px;
border: 5px solid black;
}</style></head>
<body>
<div id="box" style="width: 200px; background-color: lightblue;"></div>
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</html>
Explanation:
- When the button is clicked, the inner height of the
#boxelement is retrieved and displayed in an alert box.
Output:
- Clicking the “Get Inner Height” button will show an alert box with the inner height of the
#boxelement, which includes the height and padding, but not the border.
outerHeight(includeMargin)
The .outerHeight(includeMargin) method gets the current computed height for the first element, including padding and border, and optionally margin if includeMargin is true.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Get Outer Height Example</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <style>#box {
height: 100px;
padding: 20px;
border: 5px solid black;
margin: 10px;
}</style></head>
<body>
<div id="box" style="width: 200px; background-color: lightblue;"></div>
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</html>
Explanation:
- When the button is clicked, the outer height of the
#boxelement, including padding, border, and margin, is retrieved and displayed in an alert box.
Output:
- Clicking the “Get Outer Height” button will show an alert box with the outer height of the
#boxelement, which includes the height, padding, border, and margin.
Practical Examples
Example 1: Responsive Image Gallery
A responsive image gallery adjusts the dimensions of images to fit the screen size.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Responsive Image Gallery</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <style>.gallery img {
width: 100%;
height: auto;
display: block;
}</style></head>
<body>
<div class="gallery">
<img data-lazyloaded="1" src="data:image/gif;base64,R0lGODdhAQABAPAAAMPDwwAAACwAAAAAAQABAAACAkQBADs=" decoding="async" data-src="image1.jpg" alt="Image 1" title="Managing Dimensions with jQuery 2">
<img data-lazyloaded="1" src="data:image/gif;base64,R0lGODdhAQABAPAAAMPDwwAAACwAAAAAAQABAAACAkQBADs=" decoding="async" data-src="image2.jpg" alt="Image 2" title="Managing Dimensions with jQuery 3">
<img data-lazyloaded="1" src="data:image/gif;base64,R0lGODdhAQABAPAAAMPDwwAAACwAAAAAAQABAAACAkQBADs=" decoding="async" data-src="image3.jpg" alt="Image 3" title="Managing Dimensions with jQuery 4">
</div> <script type="litespeed/javascript">$(document).ready(function(){function adjustGallery(){var galleryWidth=$(".gallery").width();$(".gallery img").each(function(){$(this).width(galleryWidth/3-10)})}
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</html>
Explanation:
- The gallery adjusts the width of each image to be one-third of the gallery’s width minus 10 pixels for spacing.
- The
adjustGalleryfunction is called on window resize to ensure the images are resized dynamically.
Output:
- The images in the gallery will always be resized to fit the screen, maintaining a responsive layout.
Example 2: Dynamic Content Adjustment
Adjusting the dimensions of a content box based on user input.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Dynamic Content Adjustment</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <style>#contentBox {
width: 200px;
height: 100px;
background-color: lightblue;
}</style></head>
<body>
<div id="contentBox"></div>
<button id="increaseWidth">Increase Width</button>
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</html>
Explanation:
- The width of the
#contentBoxis increased or decreased by 50 pixels when the respective buttons are clicked.
Output:
- Clicking the “Increase Width” button increases the width of the
#contentBox. - Clicking the “Decrease Width” button decreases the width of the
#contentBox.
Example 3: Animated Resizing
Creating an animation effect when resizing an element.
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<html lang="en">
<head>
<meta charset="UTF-8">
<title>Animated Resizing</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <style>#animatedBox {
width: 200px;
height: 100px;
background-color: lightblue;
}</style></head>
<body>
<div id="animatedBox"></div>
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</html>
Explanation:
- The
#animatedBoxelement’s dimensions are animated to 300px width and 150px height over a duration of 1 second when the button is clicked.
Output:
- Clicking the “Animate Resize” button smoothly resizes the
#animatedBoxto the new dimensions.
In this chapter, we explored the various methods provided by jQuery to manage the dimensions of HTML elements. From basic methods like .width() and .height() to more advanced techniques involving .innerWidth(), .innerHeight(), .outerWidth(), and .outerHeight(), jQuery offers a comprehensive set of tools for handling element dimensions.Happy coding !❤️