update node modules

node_modules/clean-css/lib/optimizer/level-1/optimize.js

@@ -1,6 +1,3 @@
-var shortenHex = require('./shorten-hex');
-var shortenHsl = require('./shorten-hsl');
-var shortenRgb = require('./shorten-rgb');
 var sortSelectors = require('./sort-selectors');
 var tidyRules = require('./tidy-rules');
 var tidyBlock = require('./tidy-block');
@@ -11,399 +8,85 @@ var removeUnused = require('../remove-unused');
 var restoreFromOptimizing = require('../restore-from-optimizing');
 var wrapForOptimizing = require('../wrap-for-optimizing').all;
 
+var configuration = require('../configuration');
+var optimizers = require('./value-optimizers');
+
 var OptimizationLevel = require('../../options/optimization-level').OptimizationLevel;
 
 var Token = require('../../tokenizer/token');
 var Marker = require('../../tokenizer/marker');
 
 var formatPosition = require('../../utils/format-position');
-var split = require('../../utils/split');
 
 var serializeRules = require('../../writer/one-time').rules;
 
-var IgnoreProperty = 'ignore-property';
-
 var CHARSET_TOKEN = '@charset';
 var CHARSET_REGEXP = new RegExp('^' + CHARSET_TOKEN, 'i');
 
 var DEFAULT_ROUNDING_PRECISION = require('../../options/rounding-precision').DEFAULT;
 
-var WHOLE_PIXEL_VALUE = /(?:^|\s|\()(-?\d+)px/;
-var TIME_VALUE = /^(\-?[\d\.]+)(m?s)$/;
-
-var HEX_VALUE_PATTERN = /[0-9a-f]/i;
-var PROPERTY_NAME_PATTERN = /^(?:\-chrome\-|\-[\w\-]+\w|\w[\w\-]+\w|\-\-\S+)$/;
+var PROPERTY_NAME_PATTERN = /^(?:\-chrome\-|\-[\w\-]+\w|\w[\w\-]+\w|\w{1,}|\-\-\S+)$/;
 var IMPORT_PREFIX_PATTERN = /^@import/i;
-var QUOTED_PATTERN = /^('.*'|".*")$/;
-var QUOTED_BUT_SAFE_PATTERN = /^['"][a-zA-Z][a-zA-Z\d\-_]+['"]$/;
 var URL_PREFIX_PATTERN = /^url\(/i;
-var LOCAL_PREFIX_PATTERN = /^local\(/i;
 var VARIABLE_NAME_PATTERN = /^--\S+$/;
 
-function isLocal(value){
-  return LOCAL_PREFIX_PATTERN.test(value);
-}
-
-function isNegative(value) {
-  return value && value[1][0] == '-' && parseFloat(value[1]) < 0;
-}
-
-function isQuoted(value) {
-  return QUOTED_PATTERN.test(value);
-}
-
-function isUrl(value) {
+function startsAsUrl(value) {
   return URL_PREFIX_PATTERN.test(value);
 }
 
-function normalizeUrl(value) {
-  return value
-    .replace(URL_PREFIX_PATTERN, 'url(')
-    .replace(/\\?\n|\\?\r\n/g, '');
+function isImport(token) {
+  return IMPORT_PREFIX_PATTERN.test(token[1]);
 }
 
-function optimizeBackground(property) {
-  var values = property.value;
+function isLegacyFilter(property) {
+  var value;
 
-  if (values.length == 1 && values[0][1] == 'none') {
-    values[0][1] = '0 0';
-  }
+  if (property.name == 'filter' || property.name == '-ms-filter') {
+    value = property.value[0][1];
 
-  if (values.length == 1 && values[0][1] == 'transparent') {
-    values[0][1] = '0 0';
-  }
-}
-
-function optimizeBorderRadius(property) {
-  var values = property.value;
-  var spliceAt;
-
-  if (values.length == 3 && values[1][1] == '/' && values[0][1] == values[2][1]) {
-    spliceAt = 1;
-  } else if (values.length == 5 && values[2][1] == '/' && values[0][1] == values[3][1] && values[1][1] == values[4][1]) {
-    spliceAt = 2;
-  } else if (values.length == 7 && values[3][1] == '/' && values[0][1] == values[4][1] && values[1][1] == values[5][1] && values[2][1] == values[6][1]) {
-    spliceAt = 3;
-  } else if (values.length == 9 && values[4][1] == '/' && values[0][1] == values[5][1] && values[1][1] == values[6][1] && values[2][1] == values[7][1] && values[3][1] == values[8][1]) {
-    spliceAt = 4;
-  }
-
-  if (spliceAt) {
-    property.value.splice(spliceAt);
-    property.dirty = true;
-  }
-}
-
-/**
- * @param {string} name
- * @param {string} value
- * @param {Object} compatibility
- * @return {string}
- */
-function optimizeColors(name, value, compatibility) {
-  if (!value.match(/#|rgb|hsl/gi)) {
-    return shortenHex(value);
-  }
-
-  value = value
-    .replace(/(rgb|hsl)a?\((\-?\d+),(\-?\d+\%?),(\-?\d+\%?),(0*[1-9]+[0-9]*(\.?\d*)?)\)/gi, function (match, colorFn, p1, p2, p3, alpha) {
-      return (parseInt(alpha, 10) >= 1 ? colorFn + '(' + [p1,p2,p3].join(',') + ')' : match);
-    })
-    .replace(/rgb\((\-?\d+),(\-?\d+),(\-?\d+)\)/gi, function (match, red, green, blue) {
-      return shortenRgb(red, green, blue);
-    })
-    .replace(/hsl\((-?\d+),(-?\d+)%?,(-?\d+)%?\)/gi, function (match, hue, saturation, lightness) {
-      return shortenHsl(hue, saturation, lightness);
-    })
-    .replace(/(^|[^='"])#([0-9a-f]{6})/gi, function (match, prefix, color, at, inputValue) {
-      var suffix = inputValue[at + match.length];
-
-      if (suffix && HEX_VALUE_PATTERN.test(suffix)) {
-        return match;
-      } else if (color[0] == color[1] && color[2] == color[3] && color[4] == color[5]) {
-        return (prefix + '#' + color[0] + color[2] + color[4]).toLowerCase();
-      } else {
-        return (prefix + '#' + color).toLowerCase();
-      }
-    })
-    .replace(/(^|[^='"])#([0-9a-f]{3})/gi, function (match, prefix, color) {
-      return prefix + '#' + color.toLowerCase();
-    })
-    .replace(/(rgb|rgba|hsl|hsla)\(([^\)]+)\)/gi, function (match, colorFunction, colorDef) {
-      var tokens = colorDef.split(',');
-      var colorFnLowercase = colorFunction && colorFunction.toLowerCase();
-      var applies = (colorFnLowercase == 'hsl' && tokens.length == 3) ||
-        (colorFnLowercase == 'hsla' && tokens.length == 4) ||
-        (colorFnLowercase == 'rgb' && tokens.length === 3 && colorDef.indexOf('%') > 0) ||
-        (colorFnLowercase == 'rgba' && tokens.length == 4 && colorDef.indexOf('%') > 0);
-
-      if (!applies) {
-        return match;
-      }
-
-      if (tokens[1].indexOf('%') == -1) {
-        tokens[1] += '%';
-      }
-
-      if (tokens[2].indexOf('%') == -1) {
-        tokens[2] += '%';
-      }
-
-      return colorFunction + '(' + tokens.join(',') + ')';
-    });
-
-  if (compatibility.colors.opacity && name.indexOf('background') == -1) {
-    value = value.replace(/(?:rgba|hsla)\(0,0%?,0%?,0\)/g, function (match) {
-      if (split(value, ',').pop().indexOf('gradient(') > -1) {
-        return match;
-      }
-
-      return 'transparent';
-    });
-  }
-
-  return shortenHex(value);
-}
-
-function optimizeFilter(property) {
-  if (property.value.length == 1) {
-    property.value[0][1] = property.value[0][1].replace(/progid:DXImageTransform\.Microsoft\.(Alpha|Chroma)(\W)/, function (match, filter, suffix) {
-      return filter.toLowerCase() + suffix;
-    });
-  }
-
-  property.value[0][1] = property.value[0][1]
-    .replace(/,(\S)/g, ', $1')
-    .replace(/ ?= ?/g, '=');
-}
-
-function optimizeFontWeight(property, atIndex) {
-  var value = property.value[atIndex][1];
-
-  if (value == 'normal') {
-    value = '400';
-  } else if (value == 'bold') {
-    value = '700';
-  }
-
-  property.value[atIndex][1] = value;
-}
-
-function optimizeMultipleZeros(property) {
-  var values = property.value;
-  var spliceAt;
-
-  if (values.length == 4 && values[0][1] === '0' && values[1][1] === '0' && values[2][1] === '0' && values[3][1] === '0') {
-    if (property.name.indexOf('box-shadow') > -1) {
-      spliceAt = 2;
-    } else {
-      spliceAt = 1;
-    }
-  }
-
-  if (spliceAt) {
-    property.value.splice(spliceAt);
-    property.dirty = true;
-  }
-}
-
-function optimizeOutline(property) {
-  var values = property.value;
-
-  if (values.length == 1 && values[0][1] == 'none') {
-    values[0][1] = '0';
-  }
-}
-
-function optimizePixelLengths(_, value, compatibility) {
-  if (!WHOLE_PIXEL_VALUE.test(value)) {
-    return value;
-  }
-
-  return value.replace(WHOLE_PIXEL_VALUE, function (match, val) {
-    var newValue;
-    var intVal = parseInt(val);
-
-    if (intVal === 0) {
-      return match;
-    }
-
-    if (compatibility.properties.shorterLengthUnits && compatibility.units.pt && intVal * 3 % 4 === 0) {
-      newValue = intVal * 3 / 4 + 'pt';
-    }
-
-    if (compatibility.properties.shorterLengthUnits && compatibility.units.pc && intVal % 16 === 0) {
-      newValue = intVal / 16 + 'pc';
-    }
-
-    if (compatibility.properties.shorterLengthUnits && compatibility.units.in && intVal % 96 === 0) {
-      newValue = intVal / 96 + 'in';
-    }
-
-    if (newValue) {
-      newValue = match.substring(0, match.indexOf(val)) + newValue;
-    }
-
-    return newValue && newValue.length < match.length ? newValue : match;
-  });
-}
-
-function optimizePrecision(_, value, precisionOptions) {
-  if (!precisionOptions.enabled || value.indexOf('.') === -1) {
-    return value;
-  }
-
-  return value
-    .replace(precisionOptions.decimalPointMatcher, '$1$2$3')
-    .replace(precisionOptions.zeroMatcher, function (match, integerPart, fractionPart, unit) {
-      var multiplier = precisionOptions.units[unit].multiplier;
-      var parsedInteger = parseInt(integerPart);
-      var integer = isNaN(parsedInteger) ? 0 : parsedInteger;
-      var fraction = parseFloat(fractionPart);
-
-      return Math.round((integer + fraction) * multiplier) / multiplier + unit;
-    });
-}
-
-function optimizeTimeUnits(_, value) {
-  if (!TIME_VALUE.test(value))
-    return value;
-
-  return value.replace(TIME_VALUE, function (match, val, unit) {
-    var newValue;
-
-    if (unit == 'ms') {
-      newValue = parseInt(val) / 1000 + 's';
-    } else if (unit == 's') {
-      newValue = parseFloat(val) * 1000 + 'ms';
-    }
-
-    return newValue.length < match.length ? newValue : match;
-  });
-}
-
-function optimizeUnits(name, value, unitsRegexp) {
-  if (/^(?:\-moz\-calc|\-webkit\-calc|calc|rgb|hsl|rgba|hsla)\(/.test(value)) {
-    return value;
-  }
-
-  if (name == 'flex' || name == '-ms-flex' || name == '-webkit-flex' || name == 'flex-basis' || name == '-webkit-flex-basis') {
-    return value;
-  }
-
-  if (value.indexOf('%') > 0 && (name == 'height' || name == 'max-height' || name == 'width' || name == 'max-width')) {
-    return value;
-  }
-
-  return value
-    .replace(unitsRegexp, '$1' + '0' + '$2')
-    .replace(unitsRegexp, '$1' + '0' + '$2');
-}
-
-function optimizeWhitespace(name, value) {
-  if (name.indexOf('filter') > -1 || value.indexOf(' ') == -1 || value.indexOf('expression') === 0) {
-    return value;
-  }
-
-  if (value.indexOf(Marker.SINGLE_QUOTE) > -1 || value.indexOf(Marker.DOUBLE_QUOTE) > -1) {
-    return value;
-  }
-
-  value = value.replace(/\s+/g, ' ');
-
-  if (value.indexOf('calc') > -1) {
-    value = value.replace(/\) ?\/ ?/g, ')/ ');
-  }
-
-  return value
-    .replace(/(\(;?)\s+/g, '$1')
-    .replace(/\s+(;?\))/g, '$1')
-    .replace(/, /g, ',');
-}
-
-function optimizeZeroDegUnit(_, value) {
-  if (value.indexOf('0deg') == -1) {
-    return value;
-  }
-
-  return value.replace(/\(0deg\)/g, '(0)');
-}
-
-function optimizeZeroUnits(name, value) {
-  if (value.indexOf('0') == -1) {
-    return value;
-  }
-
-  if (value.indexOf('-') > -1) {
-    value = value
-      .replace(/([^\w\d\-]|^)\-0([^\.]|$)/g, '$10$2')
-      .replace(/([^\w\d\-]|^)\-0([^\.]|$)/g, '$10$2');
-  }
-
-  return value
-    .replace(/(^|\s)0+([1-9])/g, '$1$2')
-    .replace(/(^|\D)\.0+(\D|$)/g, '$10$2')
-    .replace(/(^|\D)\.0+(\D|$)/g, '$10$2')
-    .replace(/\.([1-9]*)0+(\D|$)/g, function (match, nonZeroPart, suffix) {
-      return (nonZeroPart.length > 0 ? '.' : '') + nonZeroPart + suffix;
-    })
-    .replace(/(^|\D)0\.(\d)/g, '$1.$2');
-}
-
-function removeQuotes(name, value) {
-  if (name == 'content' || name.indexOf('font-variation-settings') > -1 || name.indexOf('font-feature-settings') > -1 || name == 'grid' || name.indexOf('grid-') > -1) {
-    return value;
-  }
-
-  return QUOTED_BUT_SAFE_PATTERN.test(value) ?
-    value.substring(1, value.length - 1) :
-    value;
-}
-
-function removeUrlQuotes(value) {
-  return /^url\(['"].+['"]\)$/.test(value) && !/^url\(['"].*[\*\s\(\)'"].*['"]\)$/.test(value) && !/^url\(['"]data:[^;]+;charset/.test(value) ?
-    value.replace(/["']/g, '') :
-    value;
-}
-
-function transformValue(propertyName, propertyValue, rule, transformCallback) {
-  var selector = serializeRules(rule);
-  var transformedValue = transformCallback(propertyName, propertyValue, selector);
-
-  if (transformedValue === undefined) {
-    return propertyValue;
-  } else if (transformedValue === false) {
-    return IgnoreProperty;
+    return value.indexOf('progid') > -1 ||
+      value.indexOf('alpha') === 0 ||
+      value.indexOf('chroma') === 0;
   } else {
-    return transformedValue;
+    return false;
   }
 }
 
-//
+function noop() {}
 
 function optimizeBody(rule, properties, context) {
   var options = context.options;
-  var levelOptions = options.level[OptimizationLevel.One];
+  var valueOptimizers;
   var property, name, type, value;
-  var valueIsUrl;
   var propertyToken;
-  var _properties = wrapForOptimizing(properties, true);
+  var propertyOptimizer;
+  var serializedRule = serializeRules(rule);
+  var _properties = wrapForOptimizing(properties);
+  var pluginValueOptimizers = context.options.plugins.level1Value;
+  var pluginPropertyOptimizers = context.options.plugins.level1Property;
+  var i, l;
 
   propertyLoop:
-  for (var i = 0, l = _properties.length; i < l; i++) {
+  for (i = 0, l = _properties.length; i < l; i++) {
+    var j, k, m, n;
+
     property = _properties[i];
     name = property.name;
+    propertyOptimizer = configuration[name] && configuration[name].propertyOptimizer || noop;
+    valueOptimizers = configuration[name] && configuration[name].valueOptimizers || [optimizers.whiteSpace];
 
     if (!PROPERTY_NAME_PATTERN.test(name)) {
       propertyToken = property.all[property.position];
       context.warnings.push('Invalid property name \'' + name + '\' at ' + formatPosition(propertyToken[1][2][0]) + '. Ignoring.');
       property.unused = true;
+      continue;
     }
 
     if (property.value.length === 0) {
       propertyToken = property.all[property.position];
       context.warnings.push('Empty property \'' + name + '\' at ' + formatPosition(propertyToken[1][2][0]) + '. Ignoring.');
       property.unused = true;
+      continue;
     }
 
     if (property.hack && (
@@ -411,17 +94,11 @@ function optimizeBody(rule, properties, context) {
         property.hack[0] == Hack.BACKSLASH && !options.compatibility.properties.ieSuffixHack ||
         property.hack[0] == Hack.BANG && !options.compatibility.properties.ieBangHack)) {
       property.unused = true;
-    }
-
-    if (levelOptions.removeNegativePaddings && name.indexOf('padding') === 0 && (isNegative(property.value[0]) || isNegative(property.value[1]) || isNegative(property.value[2]) || isNegative(property.value[3]))) {
-      property.unused = true;
+      continue;
     }
 
     if (!options.compatibility.properties.ieFilters && isLegacyFilter(property)) {
       property.unused = true;
-    }
-
-    if (property.unused) {
       continue;
     }
 
@@ -434,10 +111,10 @@ function optimizeBody(rule, properties, context) {
       continue;
     }
 
-    for (var j = 0, m = property.value.length; j < m; j++) {
+    valuesLoop:
+    for (j = 0, m = property.value.length; j < m; j++) {
       type = property.value[j][0];
       value = property.value[j][1];
-      valueIsUrl = isUrl(value);
 
       if (type == Token.PROPERTY_BLOCK) {
         property.unused = true;
@@ -445,70 +122,27 @@ function optimizeBody(rule, properties, context) {
         break;
       }
 
-      if (valueIsUrl && !context.validator.isUrl(value)) {
+      if (startsAsUrl(value) && !context.validator.isUrl(value)) {
         property.unused = true;
         context.warnings.push('Broken URL \'' + value + '\' at ' + formatPosition(property.value[j][2][0]) + '. Ignoring.');
         break;
       }
 
-      if (valueIsUrl) {
-        value = levelOptions.normalizeUrls ?
-          normalizeUrl(value) :
-          value;
-        value = !options.compatibility.properties.urlQuotes ?
-          removeUrlQuotes(value) :
-          value;
-      } else if (isQuoted(value) || isLocal(value)) {
-        value = levelOptions.removeQuotes ?
-          removeQuotes(name, value) :
-          value;
-      } else {
-        value = levelOptions.removeWhitespace ?
-          optimizeWhitespace(name, value) :
-          value;
-        value = optimizePrecision(name, value, options.precision);
-        value = optimizePixelLengths(name, value, options.compatibility);
-        value = levelOptions.replaceTimeUnits ?
-          optimizeTimeUnits(name, value) :
-          value;
-        value = levelOptions.replaceZeroUnits ?
-          optimizeZeroUnits(name, value) :
-          value;
-
-        if (options.compatibility.properties.zeroUnits) {
-          value = optimizeZeroDegUnit(name, value);
-          value = optimizeUnits(name, value, options.unitsRegexp);
-        }
-
-        if (options.compatibility.properties.colors) {
-          value = optimizeColors(name, value, options.compatibility);
-        }
+      for (k = 0, n = valueOptimizers.length; k < n; k++) {
+        value = valueOptimizers[k](name, value, options);
       }
 
-      value = transformValue(name, value, rule, levelOptions.transform);
-
-      if (value === IgnoreProperty) {
-        property.unused = true;
-        continue propertyLoop;
+      for (k = 0, n = pluginValueOptimizers.length; k < n; k++) {
+        value = pluginValueOptimizers[k](name, value, options);
       }
 
       property.value[j][1] = value;
     }
 
-    if (levelOptions.replaceMultipleZeros) {
-      optimizeMultipleZeros(property);
-    }
+    propertyOptimizer(serializedRule, property, options);
 
-    if (name == 'background' && levelOptions.optimizeBackground) {
-      optimizeBackground(property);
-    } else if (name.indexOf('border') === 0 && name.indexOf('radius') > 0 && levelOptions.optimizeBorderRadius) {
-      optimizeBorderRadius(property);
-    } else if (name == 'filter'&& levelOptions.optimizeFilter && options.compatibility.properties.ieFilters) {
-      optimizeFilter(property);
-    } else if (name == 'font-weight' && levelOptions.optimizeFontWeight) {
-      optimizeFontWeight(property, 0);
-    } else if (name == 'outline' && levelOptions.optimizeOutline) {
-      optimizeOutline(property);
+    for (j = 0, m = pluginPropertyOptimizers.length; j < m; j++) {
+      pluginPropertyOptimizers[j](serializedRule, property, options);
     }
   }
 
@@ -613,24 +247,6 @@ function buildPrecisionOptions(roundingPrecision) {
   return precisionOptions;
 }
 
-function isImport(token) {
-  return IMPORT_PREFIX_PATTERN.test(token[1]);
-}
-
-function isLegacyFilter(property) {
-  var value;
-
-  if (property.name == 'filter' || property.name == '-ms-filter') {
-    value = property.value[0][1];
-
-    return value.indexOf('progid') > -1 ||
-      value.indexOf('alpha') === 0 ||
-      value.indexOf('chroma') === 0;
-  } else {
-    return false;
-  }
-}
-
 function level1Optimize(tokens, context) {
   var options = context.options;
   var levelOptions = options.level[OptimizationLevel.One];

node_modules/clean-css/lib/optimizer/level-1/property-optimizers.js

@@ -0,0 +1,10 @@
+module.exports = {
+  background: require('./property-optimizers/background').level1.property,
+  boxShadow: require('./property-optimizers/box-shadow').level1.property,
+  borderRadius: require('./property-optimizers/border-radius').level1.property,
+  filter: require('./property-optimizers/filter').level1.property,
+  fontWeight: require('./property-optimizers/font-weight').level1.property,
+  margin: require('./property-optimizers/margin').level1.property,
+  outline: require('./property-optimizers/outline').level1.property,
+  padding: require('./property-optimizers/padding').level1.property
+};

node_modules/clean-css/lib/optimizer/level-1/property-optimizers/background.js

@@ -0,0 +1,23 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var plugin = {
+  level1: {
+    property: function background(_rule, property, options) {
+      var values = property.value;
+
+      if (!options.level[OptimizationLevel.One].optimizeBackground) {
+        return;
+      }
+
+      if (values.length == 1 && values[0][1] == 'none') {
+        values[0][1] = '0 0';
+      }
+
+      if (values.length == 1 && values[0][1] == 'transparent') {
+        values[0][1] = '0 0';
+      }
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/property-optimizers/border-radius.js

@@ -0,0 +1,29 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var plugin = {
+  level1: {
+    property: function borderRadius(_rule, property, options) {
+      var values = property.value;
+
+      if (!options.level[OptimizationLevel.One].optimizeBorderRadius) {
+        return;
+      }
+
+      if (values.length == 3 && values[1][1] == '/' && values[0][1] == values[2][1]) {
+        property.value.splice(1);
+        property.dirty = true;
+      } else if (values.length == 5 && values[2][1] == '/' && values[0][1] == values[3][1] && values[1][1] == values[4][1]) {
+        property.value.splice(2);
+        property.dirty = true;
+      } else if (values.length == 7 && values[3][1] == '/' && values[0][1] == values[4][1] && values[1][1] == values[5][1] && values[2][1] == values[6][1]) {
+        property.value.splice(3);
+        property.dirty = true;
+      } else if (values.length == 9 && values[4][1] == '/' && values[0][1] == values[5][1] && values[1][1] == values[6][1] && values[2][1] == values[7][1] && values[3][1] == values[8][1]) {
+        property.value.splice(4);
+        property.dirty = true;
+      }
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/property-optimizers/box-shadow.js

@@ -0,0 +1,15 @@
+var plugin = {
+  level1: {
+    property: function boxShadow(_rule, property) {
+      var values = property.value;
+
+      // remove multiple zeros
+      if (values.length == 4 && values[0][1] === '0' && values[1][1] === '0' && values[2][1] === '0' && values[3][1] === '0') {
+        property.value.splice(2);
+        property.dirty = true;
+      }
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/property-optimizers/filter.js

@@ -0,0 +1,31 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var ALPHA_OR_CHROMA_FILTER_PATTERN = /progid:DXImageTransform\.Microsoft\.(Alpha|Chroma)(\W)/;
+var NO_SPACE_AFTER_COMMA_PATTERN = /,(\S)/g;
+var WHITESPACE_AROUND_EQUALS_PATTERN = / ?= ?/g;
+
+var plugin = {
+  level1: {
+    property: function filter(_rule, property, options) {
+      if (!options.compatibility.properties.ieFilters) {
+        return;
+      }
+
+      if (!options.level[OptimizationLevel.One].optimizeFilter) {
+        return;
+      }
+
+      if (property.value.length == 1) {
+        property.value[0][1] = property.value[0][1].replace(ALPHA_OR_CHROMA_FILTER_PATTERN, function (match, filter, suffix) {
+          return filter.toLowerCase() + suffix;
+        });
+      }
+
+      property.value[0][1] = property.value[0][1]
+        .replace(NO_SPACE_AFTER_COMMA_PATTERN, ', $1')
+        .replace(WHITESPACE_AROUND_EQUALS_PATTERN, '=');
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/property-optimizers/font-weight.js

@@ -0,0 +1,23 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var plugin = {
+  level1: {
+    property: function fontWeight(_rule, property, options) {
+      var value = property.value[0][1];
+
+      if (!options.level[OptimizationLevel.One].optimizeFontWeight) {
+        return;
+      }
+
+      if (value == 'normal') {
+        value = '400';
+      } else if (value == 'bold') {
+        value = '700';
+      }
+
+      property.value[0][1] = value;
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/property-optimizers/margin.js

@@ -0,0 +1,21 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var plugin = {
+  level1: {
+    property: function margin(_rule, property, options) {
+      var values = property.value;
+
+      if (!options.level[OptimizationLevel.One].replaceMultipleZeros) {
+        return;
+      }
+
+      // remove multiple zeros
+      if (values.length == 4 && values[0][1] === '0' && values[1][1] === '0' && values[2][1] === '0' && values[3][1] === '0') {
+        property.value.splice(1);
+        property.dirty = true;
+      }
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/property-optimizers/outline.js

@@ -0,0 +1,19 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var plugin = {
+  level1: {
+    property: function outline(_rule, property, options) {
+      var values = property.value;
+
+      if (!options.level[OptimizationLevel.One].optimizeOutline) {
+        return;
+      }
+
+      if (values.length == 1 && values[0][1] == 'none') {
+        values[0][1] = '0';
+      }
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/property-optimizers/padding.js

@@ -0,0 +1,26 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+function isNegative(value) {
+  return value && value[1][0] == '-' && parseFloat(value[1]) < 0;
+}
+
+var plugin = {
+  level1: {
+    property: function padding(_rule, property, options) {
+      var values = property.value;
+
+      // remove multiple zeros
+      if (values.length == 4 && values[0][1] === '0' && values[1][1] === '0' && values[2][1] === '0' && values[3][1] === '0') {
+        property.value.splice(1);
+        property.dirty = true;
+      }
+
+      // remove negative paddings
+      if (options.level[OptimizationLevel.One].removeNegativePaddings && (isNegative(property.value[0]) || isNegative(property.value[1]) || isNegative(property.value[2]) || isNegative(property.value[3]))) {
+        property.unused = true;
+      }
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/tidy-block.js

@@ -1,20 +1,31 @@
 var SUPPORTED_COMPACT_BLOCK_MATCHER = /^@media\W/;
+var SUPPORTED_QUOTE_REMOVAL_MATCHER = /^@(?:keyframes|-moz-keyframes|-o-keyframes|-webkit-keyframes)\W/;
 
 function tidyBlock(values, spaceAfterClosingBrace) {
   var withoutSpaceAfterClosingBrace;
+  var withoutQuotes;
   var i;
 
   for (i = values.length - 1; i >= 0; i--) {
     withoutSpaceAfterClosingBrace = !spaceAfterClosingBrace && SUPPORTED_COMPACT_BLOCK_MATCHER.test(values[i][1]);
+    withoutQuotes = SUPPORTED_QUOTE_REMOVAL_MATCHER.test(values[i][1]);
 
     values[i][1] = values[i][1]
       .replace(/\n|\r\n/g, ' ')
       .replace(/\s+/g, ' ')
       .replace(/(,|:|\() /g, '$1')
-      .replace(/ \)/g, ')')
-      .replace(/'([a-zA-Z][a-zA-Z\d\-_]+)'/, '$1')
-      .replace(/"([a-zA-Z][a-zA-Z\d\-_]+)"/, '$1')
-      .replace(withoutSpaceAfterClosingBrace ? /\) /g : null, ')');
+      .replace(/ \)/g, ')');
+
+    if (withoutQuotes) {
+      values[i][1] = values[i][1]
+        .replace(/'([a-zA-Z][a-zA-Z\d\-_]+)'/, '$1')
+        .replace(/"([a-zA-Z][a-zA-Z\d\-_]+)"/, '$1');
+    }
+
+    if (withoutSpaceAfterClosingBrace) {
+      values[i][1] = values[i][1]
+        .replace(/\) /g, ')');
+    }
   }
 
   return values;

node_modules/clean-css/lib/optimizer/level-1/tidy-rules.js

@@ -16,6 +16,18 @@ var ASTERISK_PLUS_HTML_HACK = '*+html ';
 var ASTERISK_FIRST_CHILD_PLUS_HTML_HACK = '*:first-child+html ';
 var LESS_THAN = '<';
 
+var PSEUDO_CLASSES_WITH_SELECTORS = [
+  ':current',
+  ':future',
+  ':has',
+  ':host',
+  ':host-context',
+  ':is',
+  ':not',
+  ':past',
+  ':where'
+];
+
 function hasInvalidCharacters(value) {
   var isEscaped;
   var isInvalid = false;
@@ -57,7 +69,9 @@ function removeWhitespace(value, format) {
   var isAttribute;
   var isRelation;
   var isWhitespace;
+  var isSpaceAwarePseudoClass;
   var roundBracketLevel = 0;
+  var wasComma = false;
   var wasRelation = false;
   var wasWhitespace = false;
   var withCaseAttribute = CASE_ATTRIBUTE_PATTERN.test(value);
@@ -72,6 +86,9 @@ function removeWhitespace(value, format) {
     isQuoted = isSingleQuoted || isDoubleQuoted;
     isRelation = !isAttribute && !isEscaped && roundBracketLevel === 0 && RELATION_PATTERN.test(character);
     isWhitespace = WHITESPACE_PATTERN.test(character);
+    isSpaceAwarePseudoClass = roundBracketLevel == 1 && character == Marker.CLOSE_ROUND_BRACKET ?
+      false :
+      isSpaceAwarePseudoClass || (roundBracketLevel === 0 && character == Marker.COLON && isPseudoClassWithSelectors(value, i));
 
     if (wasEscaped && isQuoted && isNewLineWin) {
       // swallow escaped new windows lines in comments
@@ -111,6 +128,10 @@ function removeWhitespace(value, format) {
     } else if (!isWhitespace && wasRelation && spaceAroundRelation) {
       stripped.push(Marker.SPACE);
       stripped.push(character);
+    } else if (isWhitespace && !wasWhitespace && wasComma && roundBracketLevel > 0 && isSpaceAwarePseudoClass) {
+      // skip space
+    } else if (isWhitespace && !wasWhitespace && roundBracketLevel > 0 && isSpaceAwarePseudoClass) {
+      stripped.push(character);
     } else if (isWhitespace && (isAttribute || roundBracketLevel > 0) && !isQuoted) {
       // skip space
     } else if (isWhitespace && wasWhitespace && !isQuoted) {
@@ -133,6 +154,7 @@ function removeWhitespace(value, format) {
     isEscaped = character == Marker.BACK_SLASH;
     wasRelation = isRelation;
     wasWhitespace = isWhitespace;
+    wasComma = character == Marker.COMMA;
   }
 
   return withCaseAttribute ?
@@ -140,6 +162,12 @@ function removeWhitespace(value, format) {
     stripped.join('');
 }
 
+function isPseudoClassWithSelectors(value, colonPosition) {
+  var pseudoClass = value.substring(colonPosition, value.indexOf(Marker.OPEN_ROUND_BRACKET, colonPosition));
+
+  return PSEUDO_CLASSES_WITH_SELECTORS.indexOf(pseudoClass) > -1;
+}
+
 function removeQuotes(value) {
   if (value.indexOf('\'') == -1 && value.indexOf('"') == -1) {
     return value;

node_modules/clean-css/lib/optimizer/level-1/value-optimizers.js

@@ -0,0 +1,14 @@
+module.exports = {
+  color: require('./value-optimizers/color').level1.value,
+  degrees: require('./value-optimizers/degrees').level1.value,
+  fraction: require('./value-optimizers/fraction').level1.value,
+  precision: require('./value-optimizers/precision').level1.value,
+  textQuotes: require('./value-optimizers/text-quotes').level1.value,
+  time: require('./value-optimizers/time').level1.value,
+  unit: require('./value-optimizers/unit').level1.value,
+  urlPrefix: require('./value-optimizers/url-prefix').level1.value,
+  urlQuotes: require('./value-optimizers/url-quotes').level1.value,
+  urlWhiteSpace: require('./value-optimizers/url-whitespace').level1.value,
+  whiteSpace: require('./value-optimizers/whitespace').level1.value,
+  zero: require('./value-optimizers/zero').level1.value
+};

node_modules/clean-css/lib/optimizer/level-1/value-optimizers/color.js

@@ -0,0 +1,90 @@
+var shortenHex = require('./color/shorten-hex');
+var shortenHsl = require('./color/shorten-hsl');
+var shortenRgb = require('./color/shorten-rgb');
+
+var split = require('../../../utils/split');
+
+var ANY_COLOR_FUNCTION_PATTERN = /(rgb|rgba|hsl|hsla)\(([^\(\)]+)\)/gi;
+var COLOR_PREFIX_PATTERN = /#|rgb|hsl/gi;
+var HEX_LONG_PATTERN = /(^|[^='"])#([0-9a-f]{6})/gi;
+var HEX_SHORT_PATTERN = /(^|[^='"])#([0-9a-f]{3})/gi;
+var HEX_VALUE_PATTERN = /[0-9a-f]/i;
+var HSL_PATTERN = /hsl\((-?\d+),(-?\d+)%?,(-?\d+)%?\)/gi;
+var RGBA_HSLA_PATTERN = /(rgb|hsl)a?\((\-?\d+),(\-?\d+\%?),(\-?\d+\%?),(0*[1-9]+[0-9]*(\.?\d*)?)\)/gi;
+var RGB_PATTERN = /rgb\((\-?\d+),(\-?\d+),(\-?\d+)\)/gi;
+var TRANSPARENT_FUNCTION_PATTERN = /(?:rgba|hsla)\(0,0%?,0%?,0\)/g;
+
+var plugin = {
+  level1: {
+    value: function color(name, value, options) {
+      if (!options.compatibility.properties.colors) {
+        return value;
+      }
+
+      if (!value.match(COLOR_PREFIX_PATTERN)) {
+        return shortenHex(value);
+      }
+
+      value = value
+        .replace(RGBA_HSLA_PATTERN, function (match, colorFn, p1, p2, p3, alpha) {
+          return (parseInt(alpha, 10) >= 1 ? colorFn + '(' + [p1,p2,p3].join(',') + ')' : match);
+        })
+        .replace(RGB_PATTERN, function (match, red, green, blue) {
+          return shortenRgb(red, green, blue);
+        })
+        .replace(HSL_PATTERN, function (match, hue, saturation, lightness) {
+          return shortenHsl(hue, saturation, lightness);
+        })
+        .replace(HEX_LONG_PATTERN, function (match, prefix, color, at, inputValue) {
+          var suffix = inputValue[at + match.length];
+
+          if (suffix && HEX_VALUE_PATTERN.test(suffix)) {
+            return match;
+          } else if (color[0] == color[1] && color[2] == color[3] && color[4] == color[5]) {
+            return (prefix + '#' + color[0] + color[2] + color[4]).toLowerCase();
+          } else {
+            return (prefix + '#' + color).toLowerCase();
+          }
+        })
+        .replace(HEX_SHORT_PATTERN, function (match, prefix, color) {
+          return prefix + '#' + color.toLowerCase();
+        })
+        .replace(ANY_COLOR_FUNCTION_PATTERN, function (match, colorFunction, colorDef) {
+          var tokens = colorDef.split(',');
+          var colorFnLowercase = colorFunction && colorFunction.toLowerCase();
+          var applies = (colorFnLowercase == 'hsl' && tokens.length == 3) ||
+            (colorFnLowercase == 'hsla' && tokens.length == 4) ||
+            (colorFnLowercase == 'rgb' && tokens.length === 3 && colorDef.indexOf('%') > 0) ||
+            (colorFnLowercase == 'rgba' && tokens.length == 4 && colorDef.indexOf('%') > 0);
+
+          if (!applies) {
+            return match;
+          }
+
+          if (tokens[1].indexOf('%') == -1) {
+            tokens[1] += '%';
+          }
+
+          if (tokens[2].indexOf('%') == -1) {
+            tokens[2] += '%';
+          }
+
+          return colorFunction + '(' + tokens.join(',') + ')';
+        });
+
+      if (options.compatibility.colors.opacity && name.indexOf('background') == -1) {
+        value = value.replace(TRANSPARENT_FUNCTION_PATTERN, function (match) {
+          if (split(value, ',').pop().indexOf('gradient(') > -1) {
+            return match;
+          }
+
+          return 'transparent';
+        });
+      }
+
+      return shortenHex(value);
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/value-optimizers/degrees.js

@@ -0,0 +1,19 @@
+var ZERO_DEG_PATTERN = /\(0deg\)/g;
+
+var plugin = {
+  level1: {
+    value: function degrees(_name, value, options) {
+      if (!options.compatibility.properties.zeroUnits) {
+        return value;
+      }
+
+      if (value.indexOf('0deg') == -1) {
+        return value;
+      }
+
+      return value.replace(ZERO_DEG_PATTERN, '(0)');
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/value-optimizers/fraction.js

@@ -0,0 +1,43 @@
+var startsAsUrl = require('./starts-as-url');
+
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var DOT_ZERO_PATTERN = /(^|\D)\.0+(\D|$)/g;
+var FRACTION_PATTERN = /\.([1-9]*)0+(\D|$)/g;
+var LEADING_ZERO_FRACTION_PATTERN = /(^|\D)0\.(\d)/g;
+var MINUS_ZERO_FRACTION_PATTERN = /([^\w\d\-]|^)\-0([^\.]|$)/g;
+var ZERO_PREFIXED_UNIT_PATTERN = /(^|\s)0+([1-9])/g;
+
+var plugin = {
+  level1: {
+    value: function fraction(name, value, options) {
+      if (!options.level[OptimizationLevel.One].replaceZeroUnits) {
+        return value;
+      }
+
+      if (startsAsUrl(value)) {
+        return value;
+      }
+
+      if (value.indexOf('0') == -1) {
+        return value;
+      }
+
+      if (value.indexOf('-') > -1) {
+        value = value
+          .replace(MINUS_ZERO_FRACTION_PATTERN, '$10$2')
+          .replace(MINUS_ZERO_FRACTION_PATTERN, '$10$2');
+      }
+
+      return value
+        .replace(ZERO_PREFIXED_UNIT_PATTERN, '$1$2')
+        .replace(DOT_ZERO_PATTERN, '$10$2')
+        .replace(FRACTION_PATTERN, function (match, nonZeroPart, suffix) {
+          return (nonZeroPart.length > 0 ? '.' : '') + nonZeroPart + suffix;
+        })
+        .replace(LEADING_ZERO_FRACTION_PATTERN, '$1.$2');
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/value-optimizers/precision.js

@@ -0,0 +1,22 @@
+var plugin = {
+  level1: {
+    value: function precision(_name, value, options) {
+      if (!options.precision.enabled || value.indexOf('.') === -1) {
+        return value;
+      }
+
+      return value
+        .replace(options.precision.decimalPointMatcher, '$1$2$3')
+        .replace(options.precision.zeroMatcher, function (match, integerPart, fractionPart, unit) {
+          var multiplier = options.precision.units[unit].multiplier;
+          var parsedInteger = parseInt(integerPart);
+          var integer = isNaN(parsedInteger) ? 0 : parsedInteger;
+          var fraction = parseFloat(fractionPart);
+
+          return Math.round((integer + fraction) * multiplier) / multiplier + unit;
+        });
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/value-optimizers/starts-as-url.js

@@ -0,0 +1,7 @@
+var URL_PREFIX_PATTERN = /^url\(/i;
+
+function startsAsUrl(value) {
+  return URL_PREFIX_PATTERN.test(value);
+}
+
+module.exports = startsAsUrl;

node_modules/clean-css/lib/optimizer/level-1/value-optimizers/text-quotes.js

@@ -0,0 +1,25 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var LOCAL_PREFIX_PATTERN = /^local\(/i;
+var QUOTED_PATTERN = /^('.*'|".*")$/;
+var QUOTED_BUT_SAFE_PATTERN = /^['"][a-zA-Z][a-zA-Z\d\-_]+['"]$/;
+
+var plugin = {
+  level1: {
+    value: function textQuotes(_name, value, options) {
+      if (!options.level[OptimizationLevel.One].removeQuotes) {
+        return value;
+      }
+
+      if (!QUOTED_PATTERN.test(value) && !LOCAL_PREFIX_PATTERN.test(value)) {
+        return value;
+      }
+
+      return QUOTED_BUT_SAFE_PATTERN.test(value) ?
+        value.substring(1, value.length - 1) :
+        value;
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/value-optimizers/time.js

@@ -0,0 +1,31 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var TIME_VALUE = /^(\-?[\d\.]+)(m?s)$/;
+
+var plugin = {
+  level1: {
+    value: function time(name, value, options) {
+      if (!options.level[OptimizationLevel.One].replaceTimeUnits) {
+        return value;
+      }
+
+      if (!TIME_VALUE.test(value)) {
+        return value;
+      }
+
+      return value.replace(TIME_VALUE, function (match, val, unit) {
+        var newValue;
+
+        if (unit == 'ms') {
+          newValue = parseInt(val) / 1000 + 's';
+        } else if (unit == 's') {
+          newValue = parseFloat(val) * 1000 + 'ms';
+        }
+
+        return newValue.length < match.length ? newValue : match;
+      });
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/value-optimizers/unit.js

@@ -0,0 +1,40 @@
+var WHOLE_PIXEL_VALUE = /(?:^|\s|\()(-?\d+)px/;
+
+var plugin = {
+  level1: {
+    value: function unit(_name, value, options) {
+      if (!WHOLE_PIXEL_VALUE.test(value)) {
+        return value;
+      }
+
+      return value.replace(WHOLE_PIXEL_VALUE, function (match, val) {
+        var newValue;
+        var intVal = parseInt(val);
+
+        if (intVal === 0) {
+          return match;
+        }
+
+        if (options.compatibility.properties.shorterLengthUnits && options.compatibility.units.pt && intVal * 3 % 4 === 0) {
+          newValue = intVal * 3 / 4 + 'pt';
+        }
+
+        if (options.compatibility.properties.shorterLengthUnits && options.compatibility.units.pc && intVal % 16 === 0) {
+          newValue = intVal / 16 + 'pc';
+        }
+
+        if (options.compatibility.properties.shorterLengthUnits && options.compatibility.units.in && intVal % 96 === 0) {
+          newValue = intVal / 96 + 'in';
+        }
+
+        if (newValue) {
+          newValue = match.substring(0, match.indexOf(val)) + newValue;
+        }
+
+        return newValue && newValue.length < match.length ? newValue : match;
+      });
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/value-optimizers/url-prefix.js

@@ -0,0 +1,23 @@
+var startsAsUrl = require('./starts-as-url');
+
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var URL_PREFIX_PATTERN = /^url\(/i;
+
+var plugin = {
+  level1: {
+    value: function urlPrefix(_name, value, options) {
+      if (!options.level[OptimizationLevel.One].normalizeUrls) {
+        return value;
+      }
+
+      if (!startsAsUrl(value)) {
+        return value;
+      }
+
+      return value.replace(URL_PREFIX_PATTERN, 'url(');
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/value-optimizers/url-quotes.js

@@ -0,0 +1,20 @@
+var QUOTED_URL_PATTERN = /^url\(['"].+['"]\)$/;
+var QUOTED_URL_WITH_WHITESPACE_PATTERN = /^url\(['"].*[\*\s\(\)'"].*['"]\)$/;
+var QUOTES_PATTERN = /["']/g;
+var URL_DATA_PATTERN = /^url\(['"]data:[^;]+;charset/;
+
+var plugin = {
+  level1: {
+    value: function urlQuotes(_name, value, options) {
+      if (options.compatibility.properties.urlQuotes) {
+        return value;
+      }
+
+      return QUOTED_URL_PATTERN.test(value) && !QUOTED_URL_WITH_WHITESPACE_PATTERN.test(value) && !URL_DATA_PATTERN.test(value) ?
+        value.replace(QUOTES_PATTERN, '') :
+        value;
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/value-optimizers/url-whitespace.js

@@ -0,0 +1,17 @@
+var startsAsUrl = require('./starts-as-url');
+
+var WHITESPACE_PATTERN = /\\?\n|\\?\r\n/g;
+
+var plugin = {
+  level1: {
+    value: function urlWhitespace(_name, value) {
+      if (!startsAsUrl(value)) {
+        return value;
+      }
+
+      return value.replace(WHITESPACE_PATTERN, '');
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/value-optimizers/whitespace.js

@@ -0,0 +1,40 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var Marker = require('../../../tokenizer/marker');
+
+var CALC_DIVISION_WHITESPACE_PATTERN = /\) ?\/ ?/g;
+var COMMA_AND_SPACE_PATTERN = /, /g;
+var MULTI_WHITESPACE_PATTERN = /\s+/g;
+var FUNCTION_CLOSING_BRACE_WHITESPACE_PATTERN = /\s+(;?\))/g;
+var FUNCTION_OPENING_BRACE_WHITESPACE_PATTERN = /(\(;?)\s+/g;
+
+var plugin = {
+  level1: {
+    value: function whitespace(name, value, options) {
+      if (!options.level[OptimizationLevel.One].removeWhitespace) {
+        return value;
+      }
+
+      if (value.indexOf(' ') == -1 || value.indexOf('expression') === 0) {
+        return value;
+      }
+
+      if (value.indexOf(Marker.SINGLE_QUOTE) > -1 || value.indexOf(Marker.DOUBLE_QUOTE) > -1) {
+        return value;
+      }
+
+      value = value.replace(MULTI_WHITESPACE_PATTERN, ' ');
+
+      if (value.indexOf('calc') > -1) {
+        value = value.replace(CALC_DIVISION_WHITESPACE_PATTERN, ')/ ');
+      }
+
+      return value
+        .replace(FUNCTION_OPENING_BRACE_WHITESPACE_PATTERN, '$1')
+        .replace(FUNCTION_CLOSING_BRACE_WHITESPACE_PATTERN, '$1')
+        .replace(COMMA_AND_SPACE_PATTERN, ',');
+    }
+  }
+};
+
+module.exports = plugin;

node_modules/clean-css/lib/optimizer/level-1/value-optimizers/zero.js

@@ -0,0 +1,25 @@
+var FUNCTION_PATTERN = /^(?:\-moz\-calc|\-webkit\-calc|calc|rgb|hsl|rgba|hsla|min|max|clamp)\(/;
+
+var plugin = {
+  level1: {
+    value: function zero(name, value, options) {
+      if (!options.compatibility.properties.zeroUnits) {
+        return value;
+      }
+
+      if (FUNCTION_PATTERN.test(value)) {
+        return value;
+      }
+
+      if (value.indexOf('%') > 0 && (name == 'height' || name == 'max-height' || name == 'width' || name == 'max-width')) {
+        return value;
+      }
+
+      return value
+        .replace(options.unitsRegexp, '$1' + '0' + '$2')
+        .replace(options.unitsRegexp, '$1' + '0' + '$2');
+    }
+  }
+};
+
+module.exports = plugin;