OptionalcommentsOptionalforceEnables merging of
OptionalrestructureDisable or enable a structure optimisations.
OptionalcloneTransform a copy of input AST if true. Useful in case of AST reuse.
OptionalusageUsage data for advanced optimisations.
OptionalloggerFunction to track every step of transformation.
OptionalsourceGenerate a source map when true.
OptionalfilenameFilename of input CSS, uses for source map generation.
OptionaldebugOutput debug information to stderr.
OptionalbeforeCalled right after parse is run.
OptionalafterCalled right after compress() is run.
Specify what comments to leave: