Here’s a breakdown of the HTML image code you provided, along with explanations:
First block ( with srcset and sizes attributes)
element: This is the modern HTML element for responsive images. It allows you to provide multiple versions of an image for different screen sizes and resolutions. The browser selects the most appropriate image to display. class="attachment-large size-large wp-post-image": CSS classes likely used for styling and layout within the WordPress theme.
loading="lazy": This attribute tells the browser to lazy-load the image.Lazy loading means the image is onyl loaded when it’s about to enter the viewport (visible area) of the user’s screen. This improves page load performance, especially if you have many images.
decoding="async": This attribute tells the browser to decode the image asynchronously, which can definitely help improve page rendering performance, especially on devices with limited resources.
: This element specifies the image source for WebP images. WebP is a modern image format that provides superior lossless and lossy compression for images on the web.
type="image/webp": Declares that the resource is a WebP image. Browsers that support webp will use this source.
srcset="[LIST OF WEBP URLS WITH WIDTHS]": This is the heart of responsive images. It contains a list of image URLs, each followed by it’s width in pixels (e.g., https://example.com/image-320.jpg 320w, https://example.com/image-640.jpg 640w). The w unit indicates the width of the image. The browser uses this list, combined with the sizes attribute, to decide which image to download.
sizes="(min-width: 641px) 810px, (min-width: 361px) 640px, 320px": This attribute tells the browser how much screen space the image will occupy at different viewport sizes. It consists of a list of media conditions and corresponding sizes. (min-width: 641px) 810px: If the viewport width is 641 pixels or greater, the image will occupy 810 pixels of width. (min-width: 361px) 640px: If the viewport width is 361 pixels or greater (but less then 641px), the image will occupy 640 pixels of width.
320px: If none of the above conditions are met (viewport width less than 361px), the image will occupy 320 pixels of width.
: This is the fallback element. Browsers that don’t support the element or the WebP format will use this.
width="810" height="540": Specifies the intrinsic width and height of the image. This is important for the browser to calculate the aspect ratio and reserve space for the image before it loads, preventing layout shifts.
src="https://eat.de/wp-content/uploads/2022/07/kirschkuchen-vom-blech-4754-810x540.jpg": The default image source. A relatively large image to serve as a base.
alt="Spread almond leaves on the cherry cake": The alt text, which is crucial for accessibility. It provides a textual description of the image for screen readers and is also displayed if the image fails to load. Always use descriptive alt text.
srcset="[LIST OF JPG URLS WITH WIDTHS]": Similar to the srcset in the element, but this one lists JPG versions of the image along with their widths.
sizes="(min-width: 641px) 810px, (min-width: 361px) 640px, 320px": Identical sizes attribute as the element to tell the browser the image dimensions to select on different screen sizes.
How it Works (Responsive images):
- The browser first checks if it supports the
element and WebP format. - If it does, it parses the
sizesattribute of theelement to determine how much screen space the image will occupy based on the current viewport width. - Then,it looks at the
srcsetattribute of theelement and finds the image with a width closest to the calculated screen space.It downloads that image. - If the browser doesn’t support
or WebP, it falls back to theelement and uses itssrc,srcset, andsizesattributes in a similar way to determine which JPG image to download.
Second Block (eat-endcard div):
How do you like the recipe?Thanks for your rating!
:Another container for the image and an SVG element.The CSS classes likely manage layout (using flexbox) and positioning.
: A container that holds the responsive image code for the cherry cake (similar to the first block). It includes responsive definitions for choosing appropriate image sizes.
: An inline SVG (Scalable Vector Graphics) element.SVGs are vector images, which means they scale without losing quality. This one is highly likely a decorative graphic. The paths inside the SVG define its shape.
: A span element containing text related to rating the recipe. The flex and justify-center classes likely use flexbox to center the content.
: A container for more text and a link (). The link points to the element with the ID “rezept_bewerten” (the eat-endcard div itself), effectively creating an anchor link to that section of the page.
Key Takeaways:
Responsive Images: The use of , srcset, and sizes is crucial for providing different image versions to different devices, optimizing page load times and user experiance.
WebP Support: The inclusion of WebP images is a good practice for improving image compression and reducing file sizes.
Accessibility: The alt attribute is essential for making images accessible to users with screen readers.
Performance: loading="lazy" helps improve initial page load time by deferring the loading of images until they are needed.
Semantic HTML: The code uses semantic HTML elements (e.g., , ![]()
, svg) to structure the content logically.
* WordPress Integration: The presence of the wp-post-image class suggests this is part of a WordPress theme.
this code is a well-structured example of how to implement responsive images in HTML, including support for modern image formats and accessibility considerations. The second code block is likely a call to action at the end of the recipe, encouraging users to rate it.