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Instead of using the tag in HTML, we can wrap it with the element to serve responsive images. Test it! The transform-image task will run every time you push your code. Once installed, add this configuration to your package.json: // package.json To do this, you can use the Husky package. package.jsonĪnother option is to run the tasks every time before we git push or git commit our changes. One option is to create a prestart NPM script to run the transform-image every time before starting the local server. jpeg png webp avif tiff gif svg jp2 dzi image. MacOS users may install webp 0.5.0 using homebrew: brew install webp You may also install webp 0.3. High performance Node.js image processing, the fastest module to resize JPEG, PNG, WebP, GIF, AVIF and TIFF images. However, I prefer to do it locally, because I need to visualize the images during development or writing time (also to save some build minutes on GitHub ?). MacOS users may install WebP using MacPorts: sudo port selfupdate sudo port install webp If none of it suit your needs, you may build the WebP utilities yourself. You can set up a new GitHub Actions to do so (read my 2nd post on Setting up GitHub Actions and Firebase Hosting). I don't want to run the command manually every time Great! We saved our time and the Earth (less processing power ?) successfully. It should convert just the newly added images. We need to pass in an additional parameter to the changed function to make it work.Ĭheck the gulp-changed documentation if you want to compare the files with other methods. However, convertWebp function changes the file extension from JPG to WebP. Great, here is the code to resize our images: // tasks/Ĭonst ) )įor the resizeImage function, both input and output filenames are the same, so we just need to call the changed function to compare. I followed Angular naming conventions - and dashed-case personally. I prefer to organize build tasks in tasks directory. You can give the file any name and place it anywhere in your project. Next, create a Gulp file and start coding. Npm install gulp gulp -cli jimp through2 -D This command converts, at a quality of 50 ( 0 is the worst 100 is the best), the images/flower1.jpg file and saves it as images/flower1. cwebp -q 50 images/flower1.jpg -o images/flower1.webp. Let's roll up our sleeves and start by installing the packages! # run command Click Remix to Edit to make the project editable. Take note that you can use Jimp independently to resize the images, but I find it easier to automate that with Gulp. We will be using Gulp as our build tool and the Jimp for our image processing library.
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Here is an overview of how images are organized in the project: # image folder 1024 x any height px - Used in content (e.g.1200 x 675 px - Used as post cover in collection listing (e.g.Most original images in jec.fyi have similar traits: only load when user scrolls to it)Ī brief walkthrough on the images structure serve smaller images for mobile, and bigger one for desktop) metadataĪ list of metadata to copy from the input to the output if present.You may jump straight to the code, jec-11ty-starter on GitHub, but this post contains some useful tips on image optimization and testing, so you might not want to miss! What are performant images? Import imagemin from 'imagemin' import imageminWebp from 'imagemin-webp' ( async ( ) =>