![]() Common side effects of minification include shortening variable names to one character and removing comments and unnecessary whitespace.Ĭonsider the following JavaScript function: AddAltToImg = function (imageTagAndImageID, imageContext) The result is a significant size reduction in requested assets (such as CSS, images, and JavaScript files). Minification removes unnecessary characters from code without altering functionality. This results in improved first page load performance. Fewer files mean fewer HTTP requests from the browser to the server or from the service providing your application. You can create any number of individual bundles specifically for CSS, JavaScript, etc. Bundling reduces the number of server requests that are necessary to render a web asset, such as a web page. Bundlingīundling combines multiple files into a single file. In this case, bundling and minification provide a performance improvement even after the first page request. Additionally, the browser requires a validation request for each asset. If the expires header isn't set correctly on the assets and if bundling and minification isn't used, the browser's freshness heuristics mark the assets stale after a few days. So, bundling and minification don't improve performance when requesting the same page, or pages, on the same site requesting the same assets. Once a web page has been requested, the browser caches the static assets (JavaScript, CSS, and images). Used together, bundling and minification improve performance by reducing the number of server requests and reducing the size of the requested static assets.īundling and minification primarily improve the first page request load time. What is bundling and minificationīundling and minification are two distinct performance optimizations you can apply in a web app. So there is another idea where we can apply some optimizations as a part of the loader and some optimizations in a plugin.This article explains the benefits of applying bundling and minification, including how these features can be used with ASP.NET Core web apps. But this will be a lot slower as the file size is usually really huge. A webpack plugin can operate on the entire chunk/bundle output and can optimize the whole bundle and you can see some differences in minified output.When you use the babel-loader with webpack, the code generated by webpack for the module system doesn't go through the loader and is not optimized by babel-minify.When you exclude node_modules from being run through the babel-loader, babel-minify optimizations are not applied to the excluded files as it doesn't pass through the minifier.To enable optimizations to take place in the top level scope of the file, use mangle: in minifyOptions. A webpack loader operates on single files and the minify preset as a webpack loader is going to consider each file to be executed directly in the browser global scope (by default) and will not optimize some things in the toplevel scope.But then, why does this plugin exist at all?. You can also use babel-loader for webpack and include minify as a preset and should be much faster than using this - as babel-minify will operate on smaller file sizes. minifyPreset: Pass in a custom babel-minify preset instead.babel: Pass in a custom babel-core instead. ![]() parserOpts: Configure babel with special parser options.sourceMap: Configure a sourcemap style.Accepts function, object with property test (regex), and values. Default: falsy value to remove all comments. You can find a list of all available options in the package directory. MinifyOpts are passed on to babel-preset-minify. A Webpack Plugin for babel-minify - A babel based minifier Install npm install babel-minify-webpack-plugin -save-dev Usage // const MinifyPlugin = require ( "babel-minify-webpack-plugin" )
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