Once it is installed and activated all the images sizes will be included in the image tag via the srcset attribute. In order for WordPress to output all the image sizes, a new plugin needs to be installed: the RICG Responsive Images plugin. Step 2: install the RICG Responsive Images plugin The next step is to include them in the HTML. The example above only shows four new image sizes being added, but you may want to add more or less… this will be based on your theme design. Now any time an image is upload to WordPress, it will generate the new image sizes. (More can be found out about the add_image_size function in the WordPress Codex.) It is possible with the add_image_size function to have WordPress also set the height or crop the image, but the example above will keep the original image aspect ratio. Here’s an example that adds four new image sizes:Įach call to the function includes a name (so WordPress can identify the size) and a width. To add new image sizes, you need to add calls to the add_image_size function. This is done by modifying the functions.php file. You just upload a single image, and WordPress creates the resized copies. This means you do not need to make multiple copies of an image in different sizes. This is a really powerful feature as it can be customized to make any image size. It also automatically generates 3 resized copies in these standard sizes (either height or width may change based on image ratio): Step 1: modify functions.php to generate more image sizesĮvery time you upload an image WordPress saves it at its native size. It can generate all the image sizes from a single image upload then, via a plugin, implement the image tag and srcset attributes anywhere the author chooses to insert an image. Thankfully there is a way to make WordPress do all the heavy lifting. This will not only take time, but could be an issue for any admin users that are not HTML-literate. You could go down the route of manually generating each image size, then in the HTML editor you could manually type the image tag, srcset attributes and each image. Responsive images, on the other hand, are not something WordPress deals with out of the box. Making a responsive theme and integrating it is pretty easy once you know the basics of theming.
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