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codekit purgecss features videos help about updates menu buy now purgecss view topics close topics first steps getting started live reload browsers browser sync set language options set output paths action second steps defaults for new projects build your project set target browsers stuff to know codekit git troubleshooting license recovery postcss tools autoprefixer purgecss custom postcss plugins other tools npm babel js transpiler terser js minifier rollup js bundler cache buster html minifier lightningcss bless languages sass less stylus javascript coffeescript typescript pug haml slim kit markdown json image optimizers webp png jpeg svg gif frameworks codekit frameworks tailwind bootstrap bourbon bitters zurb foundation susy nib jeet syntax checkers eslint advanced hooks environment variables adding custom languages team workflows scripting codekit editor plugins nova atom sublime text coda 2 more read only mode upgrading from 2 0 faq what s purgecss 4 12 watch the screencast purgecss removes unused css rules from your stylesheets to reduce their size and therefore speed up page loads it s very important that you configure this tool correctly or it will remove css rules that you need enabling purgecss first make sure you ve read setting language options purgecss is available for sass less stylus and regular css files select one of those files then click the purge unused css rules pop up button you can also turn on purgecss for all files at once open project settings choose one of the languages above then click the purge unused css pop up button build environments along with always and never you can set purgecss to run only when your project s build environment is set to production or development you can change this environment in project settings general using the build environment options lets you rapidly toggle various tools on and off all at once simply by changing the environment purgecss options open project settings purgecss to adjust settings critical pages to scan this list must contain every type of file where you use css rules purgecss will look only in these files to decide if each rule is used or not if you use a custom filetype and forget to add it to this list purgecss may remove rules you need in your final css follow the pattern to add your own entries the html means look in every subfolder for any file with an html extension and scan it skipped content if you need to exclude certain folders use this list the default entry node_modules will prevent purgecss from scanning files of any type in and below the node_modules folder safe block lists these lists let you tell purgecss to always keep or delete a certain rule regardless of whether it s used or not each entry can be a string class name id element name etc or regex pattern danger things to know purgecss is deliberately naive when scanning for used css rules it would be too slow to parse and run each file so purgecss simply looks for the text of each rule this means if you do clever things with css rules in your javascript such as combine different parts of a rule s name instead of using the full name all in one string purgecss may not detect that a rule is used by your script for details read the official purgecss documentation made in san diego ca follow the developer on twitter email support report a bug privacy policy