![]() ![]() It's source code is a better tutorial on how to write plugins than the webpack documentation is. Used compression-webpack-plugin to learn how to write the plugin.Big thanks to image-webpack-loader for the idea.I'm trying to keep this a small single-purpose plugin, but if you want a feature feel free to open an issue and I'll take a look. Plus image-webpack-loader is currently using an older version of imagemin. This plugin will optimize ANY images regardless of how they were added to webpack. I was suprised that there weren't any Imagemin plugins for webpack, so I made one!Ä«ecause I had other things like the favicons-webpack-plugin and responsive-loader that were generating images that I couldn't have image-webpack-loader optimize. A workaround can be found here from They also made an issue upstream which should fix it at the source here. If you get an error similar to Error in parsing SVG: Unquoted attribute value while using SVGO, you most likely have un-quoted attributes in the SVG image. True used to be the default behavior in version 2 of this plugin! Troubleshooting If set to true, this plugin will use the original image if the optimization process makes it larger. You can also use Imagemin by itself as a Node script.Module. If you use one of these build tools, checkout the codelabs for Imagemin with webpack, gulp, or grunt. To compress the images in the "images/" directory and save them to the same directory, run the following command (overwrites the original files): $ imagemin images/* -out-dir =images Imagemin npm module # Imagemin uses the appropriate plugin based on the image format of the input. The library is currently pretty plain: it offers a wrapper to gifsicle and a method to optimize gifs, wrapping the options for gifsicle. On Windows you will need to download and install the correct port of the library for your OS. The Imagemin CLI works with 5 different plugins: imagemin-gifsicle, imagemin-jpegtran, imagemin-optipng, imagemin-pngquant, and imagemin-svgo. On Linux you will need to install gifsicle using apt-get as follows: sudo apt-get install gifsicle. These aren't the only plugins available, but they'd all be good choices for your project. The table below lists popular Imagemin plugins. To modify GIF files in place, use the -batch option. Use options like -delay, -loopcount, and -optimize to tune your animations. By default, it combines two or more input files into a lqflipbookrq animation: gifsicle pic1.gif pic2.gif pic3.gif > animation.gif. Also, I use the 3rd level of optimization. For these files you can run the same command with a higher optimization level than the default: gifsicle -batch -optimize3 .gif Multiple GIFs.gifsicle-optimize 3 aD1gwwG460svvp9.gif-k16-color-method median-cut > optimized2. Install sudo apt install gifsicle and use. They offer significantly greater filesize savings, and you can customize the compression levels to meet your needs. Gifsicle is good at creating and manipulating GIF animations. After that, I want to optimize it with gifsicle. If a plugin doesn't mention whether it is "lossy" or "lossless," you can tell by its API: if you can specify the image quality of the output, then it is "lossy."įor most people, lossy plugins are the best choice. Lossy compression reduces file size, but at the expense of possibly reducing image quality. The most important thing to consider when choosing a plugin is whether it is "lossy" or "lossless." In lossless compression, no data is lost. Popular image formats may have multiple plugins to pick from. ![]() Imagemin is built around "plugins." A plugin is an npm package that compresses a particular image format (e.g. The highest level took a single megabyte off of a 27 mb gif. ![]() You can specify three levels of optimization. I tried it on some of the larger ffmpeg-created gifs and it didnât seem to do a whole lot. Generally, the npm module is the best choice because it offers more configuration options, but the CLI can be a decent alternative if you want to try Imagemin without touching any code. I first heard about gifsicle a while ago as a tool to optimize gifs. Imagemin is available as both a CLI and an npm module. Imagemin is an excellent choice for image compression because it supports a wide variety of image formats and is easily integrated with build scripts and build tools. Lighthouse currently reports on opportunities to compress images in JPEG format only. ![]()
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