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cssnano.node_cli.txt
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┏━━━━━━━━━━━━━┓
┃ CSSNANO ┃
┗━━━━━━━━━━━━━┛
ALTERNATIVES ==> # - cssnano (prefer): more modular. Good compression but slow
# - cleancss
# - csso
VERSION ==> #3.5.2
#CSS minifier
CSSNANO.process('CSS', OPTS)-> #As Node module
PROMISE(RESULT) #OPTS are passed to PostCSS (e.g. sourcemap options)
OPTS.OPTIMIZATION #BOOL|PLUGIN_OPTS (def: true for all)
OPTS.safe #BOOL (def: false). Disable reduceIdents, zindex, discardUnused, convertValues
#Might be a good idea because it does not change size that much.
CSSNANO(OPTS) #As PostCSS plugin
cssnano [FILE.css...] [FILE2.css] #CLI (1.0.3)
--no-FEATURE #
--safe #
--sourcemap #
┌──────────┐
│ CORE │
└──────────┘
core #Does:
# - remove whitespaces
# - remove last semicolon of ruleset
autoprefixer #See autoprefixer doc
#Can e.g. remove useless vendor prefixes
svgo #Reduce SVG embedded as data URI, using svgo
#PLUGIN_OPTS:
# - encode BOOL: if true, URL-encodes. If false, URL-decodes. If undefined (def), do nothing
# - plugins OBJ_ARR: PLUGIN: SVGO_PLUGIN_OPTS (see svgo doc)
┌──────────────────────┐
│ SIMPLE SHORTENER │
└──────────────────────┘
minifySelectors #Remove whitespaces in SELECTORS
convertValues #Minify LEN|TIME|ANGLE
#PLUGIN_OPTS: length|time|angle BOOL (def: true)
colormin #Minify COLOR
minifyGradients #Minify *-gradient()
reduceTransforms #Minify transform: FUNC()
calc #Reduce calc(), see CSS doc for PLUGIN_OPTS
┌────────────────┐
│ DUPLICATES │
└────────────────┘
uniqueSelectors #Remove duplicate SELECTOR inside same SELECTORS
discardDuplicates #Remove duplicate rules, i.e. exact same RULE + SELECTORS
minifyFontValues #Minify font-family|weight and duplicate font families
#PLUGIN_OPTS: removeAfterKeyword|removeDuplicates|removeQuotes BOOL (def: true)
┌───────────┐
│ MERGE │
└───────────┘
mergeRules #If two identical rules from two adjacent rulesets, merge it into one ruleset.
mergeLonghand #Use shorthand properties
mergeIndents #Merge duplicate @counter-style, @keyframes if same rules but different variable name
┌────────────┐
│ UNUSED │
└────────────┘
discardComments #Remove /* COMMENT */ but not /*! COMMENT */
#PLUGIN_OPTS:
# - removeAll BOOL (def: false): remove /*! COMMENT */
# - removeAllButFirst BOOL (def: false): remove /*! COMMENT */ but not first one
# - remove(STR)->BOOL: custom filter
discardEmpty #Remove empty rulesets
discardUnused #Remove unused @counter-style, @keyframes, @font-face, @namespace
#PLUGIN_OPTS: counterStyle|keyframes|fontFace|namespace BOOL (def: true)
┌───────────────┐
│ NORMALIZE │
└───────────────┘
normalizeCharset #Remove duplicate @charset
#If PLUGIN_OPTS.add true (def), add it if not present
reduceIdents #Minify @counter*, @keyframes, @counter-style variable names
#PLUGIN_OPTS: counter|keyframes|counterStyle BOOL (def: true)
normalizeUrl #Normalize|minify url()
#Does:
# - remove quotes
# - put lowercase
# - prepend http: if starts with '//', if PLUGIN_OPTS.normalizeProtocol true (def)
# - remove www., if PLUGIN_OPTS.stripWWW true (def)
# - remove default port
# - resolve . and ..
# - remove extra slashes
# - sort query variables
# - remove #HASH, if PLUGIN_OPTS.stripFragment true (def)
zindex #Normalize z-index NUM
orderedValues #Sort shorthand properties values