nodes

Map<string, VariableNode[]>

properties

Map<string, postcss.AtRule[]>

safelist

StringRegExpArray

usedVariables

Set<string>

addProperty(atRule)

Register an @property at-rule so it can be removed along with the declarations of the variable it defines

addVariable(declaration)

addVariableUsage(declaration, matchedVariables)

addVariableUsageInProperties(matchedVariables)

isVariablesSafelisted(variable)

removeUnused()

setAsUsed(variableName)

Mark every declaration of the variable as used. The variables it uses are not marked, removeUnused adds them to the used variables first.