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This is a string of image source URLs, likely generated by a Next.js application. Let’s break down what it means:
/next/image/?url=...: This indicates the image is being served through Next.js’s built-in image optimization system. Next.js automatically handles resizing,format conversion (like WebP),and lazy loading for images.
https%3A%2F%2Fs3-eu-west-1.amazonaws.com%2Fprod-media-racingpost%2Fprod%2Fimages%2F1691008%2F6f5510c9a941-on-the-nose.jpg: This is the original URL of the image, hosted on an Amazon S3 bucket. It’s URL-encoded (e.g., %3A represents :) which is common in URLs.The image filename is 6f5510c9a941-on-the-nose.jpg.
&w=...: This parameter specifies the width of the image in pixels. The string contains multiple URLs, each wiht a different width: 48, 64, 96, 128, 256, 384, 640, 750, 828, 1080, 1200, 1920, 2048, and 3840.
&q=75: This parameter sets the image quality to 75%. Lower values mean smaller file sizes but possibly more compression artifacts.
* src="https://www.racingpost.com/_next/image/?url=...: This is the src attribute of an
In essence, this code provides a set of different-sized versions of the same image, optimized for various screen sizes and resolutions. The browser will select the best version to download, improving performance and user experience.
This is a common technique called responsive images. It’s a best practice for web growth to ensure images load quickly and look good on all devices. Next.js makes implementing responsive images very easy.