![]() ![]() to Why not provide the exact size of the image? There is always going to be an opportunity to optimize it further by providing a smaller image. ![]() The answer is that unless the image source matches exactly the size that the image is being displayed in the page, it is always going to be too big. How do I know when an image source is too big for the size that the image is being used in the page? So here’s the question that has vexed me about image breakpoints. If we keep on this track, we eventually end up with an image source that is the exact size of the image in the page. 500 pixels wide? 450 pixels wide?Įach smaller image source offers the potential for substantial savings over the previous size. If we provided another image source that was 600×903 pixels wide, it would only be 42K. We can all agree that when the image in the page is only 400 x 602 pixels in size, that providing an image that is 800×1204 and 73K is better than having people download the largest version of the image. It would be better if we provided a smaller version like the one 800 x 1204 resolution image that is shown in the example. We can simply shrink that 2000-pixel image, and it will look good. The largest size that the image is ever displayed at is 2000 x 3010 pixels. ![]() In this example, we have a photo of Michelle Obama where the image in the page is 400 x 602 pixels for the current viewport size. Let’s take a look at a resolution switching example: We can’t rely on them looking bad to tell us when we need to change image sources. So long as we’re downscaling flexible images, they will always look good. At least art direction provides us with some hints about how many image sources might be needed. What about resolution switching breakpoints to What about resolution switching breakpoints Or I guess we can, but if we do so, we’re not really addressing the fundamental reasons why we wanted responsive images in the first place. So we can’t simply reuse our responsive layout breakpoints for our images. We want to provide multiple image sources because of performance concerns, different screen densities, etc. With the exception of art direction, the main reason why we need multiple image sources has nothing to do with where the images look bad. For our layouts, we follow Stephen Hay’s advanced methodology: We resize the browser until the page looks bad and then BOOOOM, we need a breakpoint. The answers to these questions lead to different breakpoints than the criteria we use to select breakpoints for our responsive layouts. Where and when should the various image sources be used?.How many image sources do I need to provide to cover the continuum of sizes that this image will be used for?.When I think about image breakpoints, I’m trying to answer two questions: Responsive image breakpoints are similar, but slightly different. In our responsive layouts, breakpoints refer to the viewport sizes at which we make changes to the layout or functionality of a page. If you store your image files on a third party storage adapter, then the image URL returned will be determined by the external source.To What are responsive image breakpoints? Images are generated on the first request for each image at a particular size.ĭynamic image sizes are not compatible with externally hosted images (except inserted images from Unsplash). Image sizes are automatically generated for all feature images and theme images, and regenerated whenever an image is changed, the image sizes configuration is changed, or when theme changes are made. Unlike other platforms, there’s no manual work needed to manage image sizes in your theme, it’s all done in the background for you. ![]()
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