CSS Master

it’sinstalledwhenNPMprintsitsinstallationpathtothecommandlinewindow,

andthecommandlinepromptreappears,asdepictedinFigure3.25.

Figure 3.25. Installing CSSO using Windows’ command prompt

Nowwe’rereadytominifyourCSS.

Minification with CSSO

TominifyCSSfiles,runthecssocommand,passingthenameofafileasanargu-

ment:

csso style.css

Thiswillperformbasiccompression.CSSOstripsunneededwhitespace,removes

superfloussemicolons,anddeletescommentsfromyourCSSinputfile.

Oncecomplete,CSSOwillprinttheoptimizedCSStostandardoutput,meaning

thecurrentterminalorcommandpromptwindow.Inmostcases,however,we’ll

wanttosavethatoutputtoafile.Todothat,passasecondargumenttocsso―the

name of the minified file. For example, if we wanted to save the minified version

of style.cssasstyle.min.css,we’dusethefollowing:

118 CSS Master