Javascript get background image size. I tried your code but $('.
Javascript get background image size We can get the width and height of the image by using - . I found this to be a good starting point, but there are a number of bugs relating to floating point precision to be aware of. The `Image` object is a built-in JavaScript object that represents an image. background-size: contain; Scale the image, while preserving its intrinsic aspect ratio (if any), to the largest size such that both its width and its height can fit inside the background positioning area. It helps to get to know the dimension of the target image. How do I set my background image to "fit" the screen resolution programmatically? This is my javascript on back-end: Dec 28, 2012 · Ask questions, find answers and collaborate at work with Stack Overflow for Teams. The background size is originally 1920x1080. I need to determine the height and width of this image using only JavaScript. length: This is used to set the height and width of the image. This can be done by selecting the element and setting its style. log("Width: " + img. Tip: In addition to the background-image you should also specify a background-color. create({ carImage: { width: "100%", height: "100%", resizeMode: "cover" } }) Jun 27, 2018 · I see, if my understanding is correct, you still use the "image" not "background image url" but you convert that image into a background image url, nice! though its not the answer in my question about attribute but its a new way approach to my problem, I will try it. Changing a background image in JavaScript involves modifying the style property of an HTML element to update its backgroundImage property. var imageUrl= "URL OF THE IMAGE HERE"; var BackgroundColor="RED"; // what ever color you want For changing background of BODY Mar 17, 2016 · this should do it. Javascript/JQuery W3Schools offers free online tutorials, references and exercises in all the major languages of the web. 100% 100% does not keep the aspect ratio of the original image. backgroundImage prop The backgroundImage property sets or returns the background image of an element. Also, to make sure the entire element is always covered, set the background-attachment property to fixed: This way, the background image will cover the entire element, with no stretching (the image will keep its original proportions): I'm using an image with a height of 5000px, and i want make it always appear 100% in width and height to cover the background, in mobile and desktop. The background-color will be used if the image is unavailable. clientHeight and image. logo-container img') returns null and $('. The image cannot be visible to the user on the page. – Mar 26, 2015 · Something like that, you need to know the actual image size and since you know the size of the div and actual image size, you should know when it is used as bg and having bg size contain, will set the bg width or height at 225. Try to use two different images with different size and consider the same value of background-position and see how both will be placed differently but your code will give the same result because it doesn't consider the image size. Learn how to fit a background image to the screen size on your website using CSS techniques. This As it's an empty div, unless you set it a height, the height will always be zero. Also, to make sure the entire element is always covered, set the background-attachment property to fixed: This way, the background image will cover the entire element, with no stretching (the image will keep its original proportions): Apr 12, 2011 · I only have a URL to an image. src = "image. May 15, 2018 · Ask questions, find answers and collaborate at work with Stack Overflow for Teams. . About External Resources. There are four different syntaxes you can use with this property: the keyword syntax ("auto", "cover" and "contain"), the one-value syntax (sets the width of the image (height becomes "auto"), the two-value syntax (first value: width of the image, second value: height You can set the background-size css property to contain, just like this:. If we set like backgroundSize = "100px", then the width of the background image will set to 100px and the height will adjust to auto. jpg) no-repeat top center fixed; -webkit-background-size: cover; background-size: cover; } Things that make it possible: CSS property background-size set to cover and its vendor prefixed versions; using a background-image that fades to black on the sides; position set to top center Mar 14, 2017 · What I am trying to do is display a different image depending on the screen size. width + ", Height: " + img. Let's see how? How to get image size (height and width) using JavaScript? There are certain properties for this. JS: $('. Asking for help, clarification, or responding to other answers. js: import React from 'react'; import backgroundImage from '. Is there a backgroundSize:'cover' or something like this to fix the image position and size on different screen widths? Dec 23, 2013 · I want to get all the html page elements' background images that are set using css or the element background property. Create an `Image` object by calling the `new Image()` constructor function. text(getDimensions($(this))); var img = new Image(); //Create new image. getElementById("widgetField"). when you set a background image in a div of 500px by 500px, won't the background-image show only 500px by 500px? the background image size will equal the div size. Images are of different types png, JPEG, and SVG. If only one value is given, the second is set to "auto" In this blog post, we discussed how to get the size of an image from its URL using JavaScript. var imageUrl= "URL OF THE IMAGE HERE"; var BackgroundColor="RED"; // what ever color you want For changing background of BODY Apr 12, 2011 · I only have a URL to an image. In Plain Dec 18, 2014 · I have a dynamic background image url in my web application. Provide details and share your research! But avoid …. background-image:url(); background-size:cover How do I animate a zoom-in of the image of the background in the div on mouseover or mouseneter, is there a plugin that can do this? Apr 30, 2016 · I am using fabricjs to play around with canvas, and loading a image into it via javascript. Try Teams for free Explore Teams Dec 5, 2021 · Edit in JSFiddle Alternatively, you can use the . Firstly the image’s source location is set. Both the values set the width and height respectively. When the image gets scaled, your approach does not work properly anymore. We can then read the width & height. jpg) no-repeat top center fixed; -webkit-background-size: cover; background-size: cover; } Things that make it possible: CSS property background-size set to cover and its vendor prefixed versions; using a background-image that fades to black on the sides; position set to top center May 19, 2016 · This image has 960px width and 400px height and it shows well on desktops, but if I check it on mobile devices the image's apect ratio has gone and the image become distorted. However, my background image "repeats" on larger resolution. Tiling a large image. jpg); background-size: cover; but how to proceed to get Jul 18, 2013 · #background-image { background-size: cover; // Change this to the minimum height your page will support min-height: 600px; } The rest of the code you have seems correct, so adding these should fix things up. There's a few methods you can use to fix this, I've had success in the past with Uncle Dave’s Ol’ Padded Box trick. Stretch and scale CSS background However, when I Aug 13, 2023 · So if there was no background image set before, the new background image displays. /** * Update image size using width * * param {HTMLImageElement} img * param {number} newWidth Apr 30, 2024 · In this example, clicking the "Change Background Image" button will remove the initial-background class and add the new-background class to the GFG element, changing its background image. Setting a background image in Javascript is a two-step process. This post covers how to find the image height and width in Javascript, Jquery, and Nodejs. ‘cover’ scales the image, while preserving its intrinsic aspect ratio (if any), to the smallest size such that both its width and its height can completely cover the background positioning area. Aug 10, 2013 · But the background image's aspect ratio is respected when background-size is equal to contain, so the dimension for the background image should be equal or less than its container. clientWidth will be used respectively for getting the height and width of the image. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. You can use these two pieces of information to turn cover into a percentage. I used javascript to re-size my panel depending on the screen resolution. 2. For example, suppose a dimension is 728 and a ratio is 0. This is possible with background-size. clientHeight properties of JavaScript. The proper solution to this problem is indeed to use the scaleX and scaleY property (which takes a number as scaling factor), as mentioned by @asturur on your submitted issue. Thank you! – May 25, 2023 · We need to remove the url() part that JavaScript returns to get the proper image source. Oct 23, 2017 · Use resizeMode: "contain" Resize the background image to make sure the image is fully visible and resizeMode: "cover" Resize the background image to cover the entire container, even if it has to stretch the image. Apr 20, 2017 · I'm trying to change the background image using javascript. logo-container'). The first value sets the width, the second value sets the height. Is there any way to do this in JavaScript? May 23, 2013 · Setting the background style twice overwrites it, so only the last one will stick, you'll need to use valid CSS properties, like background-image and background-size to change them seperately : Jan 15, 2014 · However, there seems to be no way to get hold of the resized background image's height in JavaScript. CSS does not allow you to set the sizes of the background image, only the way it repeats. Jun 23, 2010 · Is it possible to use JavaScript to get the actual size (width and height in pixels) of a CSS referenced background image? Set the backgroundSize property: Default value. toDataUrl() is not a function. Let us assume, I have a DIV element, which is 300px by 300px (width and height). getElementsByClassName("")[0]. But what I am asking is the way round: to have a image in the background and make the div parent adapt to that image whatever its size is. var img = new Image(); img. The image can be left to its natural size, stretched, or constrained to fit the available space. The background image needs to stretch the entire width of the viewport, which I've been able to do successfully. You can apply CSS to your Pen from any stylesheet on the web. Feb 26, 2015 · You can do it in following ways. You have quality issues because the navigator resize your image on the fly, and the original ratio is not respected. (but I want it stretched) Mar 17, 2016 · this should do it. All of them have different dimensions, so I want to adjust their size before displaying them. I've set the background up like this; body { background: black; overflow-x: hidden; overflow-y: hidden; } body: Aug 28, 2015 · I'm trying to setup a div with a background image with some text on top of it. I'm trying to get width and height of element's background-image. I tried your code but $('. Nov 17, 2015 · I want a div element to stretch across that is 33% width with a background image done in css . naturalWidth and imgElement. Jun 23, 2015 · I'm using the images as background images, because of the advantages of scaling different images to the size of my preview div (fixed size). When you click on it, it should show it inside the element ("200 300" in this case). Jul 7, 2009 · Since IE 8 and below would return the size of the visible image and not the natural size when using trying to retrieve size values, a small workaround is needed to get the full size dimensions which came from an example by Jack Moore. To get the size of an image using the `Image` object, you can use the following steps: 1. css("height") which works similarly but returns value with units intact, like 100px. HTML: CSS: width: 100px; height: 100px; background-image: url(http://placehold. This Feb 13, 2013 · Concept is simple, I have a html5 page and it is responsive , just the bground images does not change with the screen size : right now code is: Feb 9, 2016 · The background-size CSS property makes it possible to adjust the size of background images, instead of the default behavior of tiling the image at its full size. To get original image dimensions, use naturalHeight and naturalWidth properties. We covered two methods: the `naturalWidth` and `naturalHeight` properties, and the `getBoundingClientRect()` method. Dec 29, 2021 · Keep the Preview pane on either left/right to resize the pane and observe the background image's height reduce on mobile screen. . smaller class. Dec 31, 2023 · Sometimes we need to find the width and height of an im`age using javascript and jquery. This task can be achieved by using basic JavaScript. Regardless of whether you want to use Javascript or jQuery it is essential that the image is visible in the browser. Oct 13, 2015 · You want to keep things that are static in your css file, such as background-size and background-position. css({ background-image: 'url W3Schools offers free online tutorials, references and exercises in all the major languages of the web. naturalHeight for getting width and height. I don't to squeeze the image. css( "background-size", 'contain' ) See here for more information. Jul 30, 2015 · With CSS3, you would use background-size property. Aug 15, 2017 · This might have been asked before and I tried the answer given in this thread: How to get dimensions for a background image when background-size is set to contain? But in this case, the background-size is set to cover, instead of contain. Nov 22, 2022 · We can even apply an image to the background and change its size. Setup background image size with javascript. However, the image resolution is bigger and wider that the elements size. May 20, 2022 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. The background-image contains its width and height. Also Read: What Is AJAX? List of JavaScript Functions Jun 23, 2010 · Is it possible to use JavaScript to get the actual size (width and height in pixels) of a CSS referenced background image? Use imgElement. jpg"; console. You can use the `Image` object to get the size of an image from its URL. Try Teams for free Explore Teams Oct 3, 2024 · Note: Here Element is image, So image. Set the backgroundSize property: Default value. So I´ve tried to set the first background in javascript and deleted the background-image in CSS: document. I know that I can do something similar if I put the image in the html, and not in the background. Try Teams for free Explore Teams Jan 27, 2016 · I'm trying to extract portion of the image on canvas, from (0,0) with height and width 300px, and convert that imageData object into a dataUrl to be used as a background of a div. backgroundImage = "url(''); It also works. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. We make a new Image object and set its src to the new image. I have a function that resizes the canvas to make it responsive and as such would like to resize the Mar 10, 2025 · The background-size CSS property sets the size of the element's background image. I can "position" the background image using this style object property. Is there a way of resizing the background image taking into account the content below the visible portion of the screen? Oct 10, 2009 · background image doesn’t stretch full page width. I have added a red color to the 'div' along with the image so you can see that the div itself does not resize, only the bg image does. There is a JSFiddle Demo as well. Update: I don't need to get the background image size, the image tag, which can have a class or id, will Sometimes you need to position the background image inside the element. May 5, 2024 · Setting a Background Image in Javascript. Note: As commented by Rory McCrossan setting the background-size to cover will also work, that's when you don't mind cropping the image. Sep 12, 2021 · I am trying to set a background image to be full screen. I've got a webpage background image, which needs to be displayed fully at 100% of the window's size. jQuery would probably a lot less of a headache to get going. Now I know that my new background will be loaded. There's a couple of these sort of questions on SO, although they are a tad old. Oct 10, 2009 · background image doesn’t stretch full page width. height); This will give you the size of the image. 25686813186813184; the result is 186. Example: In this example, we will get the image size on a button click. This is the default value. App. Comment Feb 8, 2012 · Getting the Original Dimensions of the Image. jpeg' function App() { return ( <div className=" Sep 26, 2012 · I have a scale vector image and I want it to fill a container. Feb 15, 2014 · Using the updateImageSizeWithWidth or updateImageSizeWithHeight method below, you can increase or decrease any image without having to explicitly specify the exact width and height, you only need one value out of these two to update the image size. (but I want it stretched) Sep 26, 2010 · I'm trying to make the background image as professional as possible so I'm thinking it's best to resize it based on the size of the browser or the resolution (not sure what's usually used, but I th Feb 26, 2015 · You can do it in following ways. const styles = StyleSheet. it/200x300); JavaScript: $(this). width() returns the container width which is different from the background image. Jul 28, 2015 · The best way is to resize your image using Photoshop (for example !) and to load the resized image in the . alert( document. Is there any way to do this in JavaScript? Jan 15, 2014 · However, there seems to be no way to get hold of the resized background image's height in JavaScript. If you need to get the original image dimensions (not in the browser context), clientWidth and clientHeight properties do not work since they return incorrect values if the image is stretched/shrunk via css. com/img/123456-bg. 0. Mar 12, 2013 · Ask questions, find answers and collaborate at work with Stack Overflow for Teams. /Resources/img. To get the dimensions of the image, create an img element to test: Jul 9, 2015 · I use attr('style') and able to get below's value, background-image: url(http://example. How can I get its dimensions? Definition and Usage. style['background-image'] ); You can do the following to get all the style properties after you have made changes so you see where the new things went Aug 9, 2022 · Return Values: It returns a string value, which represents the background-size property of an element. In practice, neither the image nor the parent elements must have the rule display:none;. – Aug 8, 2017 · I need to display a bunch of images on a web page using AJAX. Property Values: auto: This is used to display the background image in its original size. This behaviour is apparent as I am trying to resize a background-size:cover image Aug 18, 2013 · I do not mean to make the background adapt to the div. So first I hide the image with CSS: background image. –. splash-image-wrap'). For example say the page loads, and the page height necessitates a scroll. There are four different syntaxes you can use with this property: the keyword syntax ("auto", "cover" and "contain"), the one-value syntax (sets the width of the image (height becomes "auto"), the two-value syntax (first value: width of the image, second value: height Apr 30, 2024 · This article will show you how to change the background color in JavaScript. Is this true? Do I have to resort to normal image elements after all? There are many approaches to getting the size of a static background image, like How do I get background image size in jQuery? but they obviously don't apply here. E. 99999999999997, and the actual canvas width is 187, so the check if the height/width is lesser than the width/height will be true, thus the aspect ratio changing when it should If you want the background image to cover the entire element, you can set the background-size property to cover. How can I get its dimensions? Jul 4, 2011 · The following code returns width/height as soon as it's available. For testing change abc123 in image source to any random string to prevent caching. We need to split on , in case the element has multiple background images. clientWidth and . The background-size property of JavaScript sets the size of the background image. Nov 22, 2022 · The background-size property of JavaScript sets the size of the background image. style. Get the CSS background image path using Jan 7, 2019 · The solution given by @spankajd is almost there but still not 100% accurate (as you'll see the background image doesn't completely fit to the canvas). Using Jquery Selectors; Plain Javascript # How to find the height and width of an image in javascript. Jun 26, 2012 · body { background: black url(/images/back. Jul 1, 2012 · I'm looking for a way to get the background image to resize to the page size (Note: not just the browser window size). I have a div-element which basically always scales its width Sep 12, 2019 · You need both of them to find the position. This can either be an image file or folder saved on the local computer, or an image located online. You can draw a canvas element over you control, even without display it, to get the color at a specific position in you controls, if it has many colors. Sets the width and height of the background image. Let's consider a large image, a 2982x2808 Firefox logo image. If the window is resized, the image needs to resize with it, to stay at 100%. css("width") and . STEP 1. – Apr 22, 2018 · Get the size of background-image with jQuery after containing with CSS. There are four different syntaxes you can use with this property: the keyword syntax ("auto", "cover" and "contain"), the one-value syntax (sets the width of the image (height becomes "auto"), the two-value syntax (first value: width of the image, second value: height), and the multiple background Jul 4, 2011 · The following code returns width/height as soon as it's available. g. Most modern browsers have support for CSS background-image options like background-size, so you may really use something like this: button{ width:40px; height:40px; border: 0; background-size: 100%; /* To fill the dimensions of container (button), or */ background-size: 40px auto; /* to specify dimensions explicitly */ } Apr 15, 2016 · A JavaScript solution is fine if there isn't a css way. I get an error: imageData. Just put a URL to it here and we'll apply it, in the order you have them, before the CSS in the Pen itself. main { position: relative; background: ur Jan 29, 2023 · Also, if you want to get the size of an image before it’s loaded, you can use Image() constructor and get the size of image. Jan 31, 2012 · If you can get the dimensions of the image then you can check them against the dimensions of the container in which the image is the background-image. The background-size property specifies the size of the background images. You can scale the image upward or downward as desired. May 7, 2014 · ok, i think i got you, thanks, let me see what i can do. dyqer srzy jlevjnil thfhqji lznlpr amp with thsfskb ncay pisivy dxudvhuv imqxevn oshw xgwoq jfiqzc