Naturalwidth javascript

I had never heard of these read only naturalWidth and naturalHeight properties but I'm happy they're available. No matter how terrible CSS mangles an img element, the original image dimensions are available. Before we get started, it's worth me spending a brief moment introducing myself to you.

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One major problem with creating UI components with the MooTools JavaScript framework is that there isn't a great way of allowing customization of template and ease of node creation.

Hey everyone! Before we get started, I just want to say it's damn hard to pick this few favorites on CodePen. But because there is just so I was recently redesigning my website and wanted to create tooltips. Making that was easy but I also wanted my tooltips to feature the a triangular pointer. I'm a disaster when it comes to images and the prospect of needing to make an image for Nice and useful properties, they can even be used to tell if an image is correcly loaded they must be non-zero.

These attributes come in handy when building image galleries. I used it to iterate through the heights and widths of each image in a photo album, size their soon-to-be parent based on the tallest and widest dimensions, and then add them to the page. So you will need do some tweaks like trigger the load again in case image was cached e.

This has previously been an issue for me so thanks for that workaround. Can I ask how doing this affects performance?

naturalwidth javascript

I currently get my CMS to spit out dimensions into data-attrs when i need this information reliably. This works great to get the image size that are present in the html file. By David Walsh September 19, By David Walsh August 5, Discussion Adam. Robert Smith. Hope it would work for others who are searching for similar solutions. How to use it for multiple images on one page? I only get dimensions from the first image. Continue this conversation via email Get only replies to your comment, the best of the rest, as well as a daily recap of all comments on this post.

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Use Code Editor.October 23, These properties contain the actual, non-modified width and height of the image. The naturalWidth and naturalHeight properties are not supported in IE8 or lower. The height and width property will give the apparent width and height after stylesheet and inline styles, inline width and height attributes, and the display property of the image and the image's parent elements have been applied.

The simplest way to get the unmodified width and height is to create a new image element, and use its width and height property. Here is a short jQuery any version plugin that adds two methods: naturalWidth and naturalHeight.

It uses branching to determine if naturalWidth and naturalHeight are supported by the browser. If supported, the method just becomes a getter for the naturalWidth or naturalHeight property. If not supported, the method creates a new unstyled image element and returns that element's actual width and height. Follow me on Twitter and Githubthat's where I'm most active these days. I welcome emailbut I'm afraid I no longer have time to answer personal requests for help regarding my plugins or posts.

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Image width, clientWidth, offsetWidth, and naturalWidth

Hey, Follow me on Twitter and Githubthat's where I'm most active these days.Write powerful, clean and maintainable JavaScript. Responsive design is one of the most useful web techniques to appear during the past few years. The image will size itself and we can add a little CSS to ensure an image cannot exceed its real dimensions. However, the width and height properties return the current resized dimensions:.

Note the image must be fully downloaded before the dimensions are available. We can still determine the real dimensions by loading the image into an in-memory object and examining the standard width and height properties, e.

Craig is a freelance UK web consultant who built his first page for IE2. Since that time he's been advocating standards, accessibility, and best-practice HTML5 techniques. He's written more than 1, articles for SitePoint and you can find him craigbuckler. Learn valuable skills with a practical introduction to Python programming!

Free JavaScript Book! Get the book free! Responsive images are normally coded without width and height attributes, e. IE6, 7 and 8. Craig Buckler.

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New books out now! Learn more. Popular Books.The CanvasRenderingContext2D. The source image is taken from the coordinates 33, 71with a width of and a height of It is drawn to the canvas at 21, 20where it is given a width of 87 and a height of The drawImage method uses the source element's intrinsic size in CSS pixels when drawing.

For example, if you load an Image and specify the optional size parameters in its constructoryou will have to use the naturalWidth and naturalHeight properties of the created instance to properly calculate things like crop and scale regions, rather than element. The same goes for videoWidth and videoHeight if the element is a embeds a media player which supports video playback into the document.

Get the latest and greatest from MDN delivered straight to your inbox. Sign in to enjoy the benefits of an MDN account. The compatibility table on this page is generated from structured data. Safari iOS? Last modified: Jul 25,by MDN contributors. Related Topics. CanvasRenderingContext2D Properties element. Learn the best of web development Get the latest and greatest from MDN delivered straight to your inbox. The newsletter is offered in English only at the moment. Sign up now.

Sign in with Github Sign in with Google. Chrome Full support 1. Edge Full support Firefox Full support 1. IE Full support 9. Opera Full support 9. Safari Full support 2. WebView Android Full support 1. Chrome Android Full support Firefox Android Full support 4.

HTML5 Responsive Design: How to Determine the Real Dimensions of an Image in JavaScript

Opera Android Full support Safari iOS Full support 1. Samsung Internet Android Full support 1. Chrome Full support Yes. Firefox Full support WebView Android Full support Yes. Chrome Android Full support Yes.

naturalwidth javascript

Firefox Android Full support Simple parallax scrolling effect inspired by Spotify. GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together. If nothing happens, download GitHub Desktop and try again.

naturalwidth javascript

If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. Simple parallax scrolling implemented as a jQuery plugin. Please also check our v2. We'd be happy to receive your feedback!

For questions and topics which go along the lines "I cannot get this to work" please turn to stackoverflow. Thank you for your understanding! Include parallax. Note: for more complex requirements we recommend using the inner HTML markup below! With that it's possible to use the parallax effect with almost any HTML content. To call the parallax plugin manually, simply select your target element with jQuery and do the following:.

What parallax. This mirror element will sit behind the other elements and match the position and dimensions of its target object. Due to the nature of this implementation, you must ensure that these parallax objects and any layers below them are transparent so that you can see the parallax effect underneath.

Also, if there is no other content in this element, you will need to ensure that it has some fixed dimensions otherwise you won't see anything.

Also, keep in mind that once initialized, the parallax plugin presumes a fixed page layout unless it encounters a scroll or resize event. If you have a dynamic page in which another javascript method may alter the DOM, you must manually refresh the parallax effect with the following commands:.

You then need to initialize it through JS and provide the naturalWidth and naturalHeight options in order to be rendered correctly.

CanvasRenderingContext2D.drawImage()

Options can be passed in via data attributes of JavaScript. Note that when specifying these options as html data-attributes, you should convert "camelCased" variable names into "dash-separated" lower-case names e. If you have a pull request you would like to submit, please ensure that you update the minified version of the library along with your code changes.

This project uses uglifyjs to perform code compression. The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

naturalwidth javascript

Skip to content. Dismiss Join GitHub today GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together. Sign up. Branch: master. Go back. Launching Xcode If nothing happens, download Xcode and try again. Latest commit. Git stats commits 4 branches 14 tags.

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Failed to load latest commit information. Oct 11, Oct 10, Canvas lets you work with bitmaps as well as generate custom drawings. In this extract from a chapter in my new book on JavaScript Graphics we look at the basics of how to transfer bitmaps to Canvas. Now available as a paperback or ebook from Amazon.

Bitmaps, gifs, jpegs and so on are common in almost all web pages. With Canvas you now work with bitmaps at the pixel level. It's not difficult, but you need to organize things to make it really easy and a good understanding helps. Our first challenge is to find out how to get bitmaps into the system so that they can be used by JavaScript, and Canvas in particular.

This loads the bitmap specified by the url into the web page and displays it at by pixels irrespective of its actual size. Assuming the img tag is:. Now you can access the properties including height, width and naturalHeight, naturalWidth which give you the actual size of the bitmap.

You can use an HTMLImageElement that has been created in this way as the source of a bitmap to use with Canvas, but the problem is that the tag will be loaded along with the page and displayed. If you want to load a bitmap into an HTMLImageElement using JavaScript then you have to use the well known idiom of creating the element and then setting its src property.

To make it visible you have to add it to the DOM using one of the many methods provided for doing this. For example:. Where the bitmap appears depends on where it is added to the DOM.

How to Get Image Dimensions (Width & Height) with Javascript

How big the image is displayed depends on what you set the height and width properties to. If you don't set them then the image is displayed at its full size, i. There is a slightly simpler way of doing the same job. If you leave out w and h then the natural size of the bitmap is used. If you leave out h then the height is scaled correctly for the given w.

So to load an image into an HTML page you might use something like:.

HTMLElement

Notice that if you don't want the image to show in the web page you can simply not add it to the DOM. This works, but if you want to go on to process the image using JavaScript you cannot simply continue writing instructions.

The image takes time to load and you cannot process it before it is finished loading. If you try:. Async Loading. Drawing an Image.However it is important to consider two situations before directly finding the dimensions of the image :. Updated on April 4, Published on February 12, Dimensions of an image can be retrieved in Javascript by : Using naturalWidth and naturalHeight properties — this would give the actual dimensions of the image.

Using width and height properties — this would give the dimensions of the image as rendered in the page. However it is important to consider two situations before directly finding the dimensions of the image : The image may not have been fetched, and trying to get the dimensions in such cases will give incorrect results.

We need to make sure that image is loaded first. We also need to check whether image is loading from the browser's cache. However if image is loaded from cache, the load event handler may not be executed for some browsers. The complete property of the image element returns true if the browser has finished fetching the image. This can be used to check whether image is already loaded in cache, so there is no need to apply the load event.

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