Responsive Images 101 by Jason Grigsby at Cloud Four (I learned all of the responsive images spec from this series, and understood why I shouldn't be using media attributes on the sources □).Some blog posts really helped me with this whole development process: So when you have an original Markdown image defined as Wrap the `` and the `` into one `` tag in order for it to workĬonst pictureElement = document. Create a separate `source` element for the WebP with feature detection via `type`Ĭonst webpElement = document. Create the `dist` folder if it doesn't exist already The formats to convert to, here this is converting all of these PNG files to the famed WebP format. `percent` is the percentage that the width will be multiplied by `dist` is the folder to which the output builds `src` is the source of these files, a glob pattern Define all of the resizes that will be done to these images. I like to paste the code all in one go and put comments for analysis and explanations (for now). This will resize all the images to a percentage of the original width that you can define in a config object, and also convert the images to a different format such as WebP. In this article we'll be using these three features.Ĭreate a little Node.js script at scripts/sharp.js, and add this file into your build pipeline by either exporting everything as a function or just running this file within an NPM script. It can be used to extract metadata from images, converting images to other formats, resizing images, etc. Sharp is a high performance Node.js image processing library. Yes, PNG, but you can always use JPG by replacing all occurrences of PNG Sharp Images used are in the basic format of.Necessary NPM packages: sharp and jsdom.This method resulted from the development of responsive images on my own site: v. In this article, we'll explore how to add responsive images to an Eleventy site using Sharp as then image-processing library. Responsive and multi-format images have become incredibly important for (especially mobile) performance of content-based websites. Responsive Images with Eleventy & Sharp Ryan Cao
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