Img width height jquery

img width height jquery

JavaScript Find Real Image Width and Height To avoid any cross- browser problem you can use the following method that requires jQuery. Maybe you need to make some choices based on that width (or height, And here's us selecting it, by finding the first img> JavaScript can find in the DOM: It has no dependencies, is pretty small, and works with jQuery if. i need To retrieve The Actual height and Width of The Image. Not The Current Size Of The Image This is the image code In My HTML. These provide the height and width of the image file itself (rather than just the If you are using jQuery and you are requesting image sizes you have to wait until. img width height jquery

Bandcamp er python tutorial: Img width height jquery

Img width height jquery These provide the height and width of the image file itself rather than just the image element. There is a specific section devoted to images. This is now img width height jquery in IE9 and all modern web browsers. There is definitely a catch though. You can also use: The correct answer is to use img. Udi Talias Your answer is wrong in two ways.
Img width height jquery This comment thread is closed. It has no dependencies, is pretty small, and works with jQuery if you're using that. You can also use: There is a specific section devoted to images. Martin Prikryl Ship custom analytics today with Keen.
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Maybe you need to make some choices based on that width or height, or both You can definitely do that. The DOM will even give you a variety of dimensions to choose from depending on what you need. There is definitely a catch though. Problem alert! You're probably going to get weirdly inconsistent results with that. The issue is rooted in when the JavaScript runs. If the JavaScript runs before that image has fully downloaded and rendered, the result will be 0.

If the JavaScript runs after the image has downloaded and rendered, the result will be correct. In our case, the image we're working with is pixels wide. It's extra confusing, because sometimes even if your code doesn't account for this, you'll still sometimes get the correct result.

That's because, probably, the image is in cache and img width height jquery bloemen sjablonen en belastingaangifte onto the page so quickly that by the time your bit of JavaScript runs, it knows the proper offsetWidth.

The minimum you can do is ensure the image has loaded before you measure it. Images emit a load event when they are finished, and you could use the callback to do the measurements img width height jquery. You'd probably want to do some error handling there too, as images can also emit an error event. There is a good chance you're abstracting this concept, so you'd be watching for any number of images, in which you'd have to loop over them and all that. Plus images can be background-images too It has no dependencies, is pretty small, and works with jQuery if you're using that.

One use case for this I had recently was a lightbox-like thing. I wanted to make sure that if I was rendering an image smaller than it actually was, the user had the ability to click on it to open it up bigger. But it only did all this stuff if it made sense to do it, which needed the image with logic to be correct!

That it also factors in the srcset descriptors in case you are using srcset. This is compared with img. It was used to img width height jquery compare the intrinsic dimension of the image with the layout dimension of the image to decide whether it can be enlarged without quality loss. These methods do not cause re-flows. And these methods are actually the performance bottleneck. But normally these methods are super fast. And the simplest approach is, to say you can read layout at img width height jquery time, but you should restrict layout changes to rAF.

The code above will force layout if you have more than one image on the page. You can easily fix this by using these methods instead of the normal jQuery ones toggleClassRaf instead of toggleClass:. Share this: Twitter Facebook. Ship custom analytics img width height jquery with Keen. Ahnensuche deutschland kostenlos the image: This is a race condition, and that's a bad thing.

The Good Way The minimum you can do is ensure the image has loaded before you measure it. Here we're just watching for all images on the entire page to be loaded before testing widths: Joe Hoeller. Permalink to comment March 15, Udi Talias.

Those are very janky as they cause a reflow of the page when accessing them. Alexander Farkas. Permalink to comment March 16, Udi Talias Your answer is wrong in two ways.

You can easily fix this by using these methods instead of the normal jQuery ones toggleClassRaf instead of toggleClass: This comment thread is closed. If you have important information to share, please contact us.

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