var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

var isBrowser = (typeof window === "undefined" ? "undefined" : _typeof(window)) === "object" && (typeof document === "undefined" ? "undefined" : _typeof(document)) === 'object' && document.nodeType === 9;

function _arrayWithoutHoles(arr) {
  if (Array.isArray(arr)) {
    for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) {
      arr2[i] = arr[i];
    }

    return arr2;
  }
}

function _iterableToArray(iter) {
  if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === "[object Arguments]") return Array.from(iter);
}

function _nonIterableSpread() {
  throw new TypeError("Invalid attempt to spread non-iterable instance");
}

function _toConsumableArray(arr) {
  return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _nonIterableSpread();
}

// Export javascript style and css style vendor prefixes.
var js = '';
var css = '';
var vendor = '';
var browser = '';
var isTouch = isBrowser && 'ontouchstart' in document.documentElement; // We should not do anything if required serverside.

if (isBrowser) {
  // Order matters. We need to check Webkit the last one because
  // other vendors use to add Webkit prefixes to some properties
  var jsCssMap = {
    Moz: '-moz-',
    ms: '-ms-',
    O: '-o-',
    Webkit: '-webkit-'
  };

  var _document$createEleme = document.createElement('p'),
      style = _document$createEleme.style;

  var testProp = 'Transform';

  for (var key in jsCssMap) {
    if (key + testProp in style) {
      js = key;
      css = jsCssMap[key];
      break;
    }
  } // Correctly detect the Edge browser.


  if (js === 'Webkit' && 'msHyphens' in style) {
    js = 'ms';
    css = jsCssMap.ms;
    browser = 'edge';
  } // Correctly detect the Safari browser.


  if (js === 'Webkit' && '-apple-trailing-word' in style) {
    vendor = 'apple';
  }
}
/**
 * Vendor prefix string for the current browser.
 *
 * @type {{js: String, css: String, vendor: String, browser: String}}
 * @api public
 */


var prefix = {
  js: js,
  css: css,
  vendor: vendor,
  browser: browser,
  isTouch: isTouch
};

/**
 * Test if a keyframe at-rule should be prefixed or not
 *
 * @param {String} vendor prefix string for the current browser.
 * @return {String}
 * @api public
 */

function supportedKeyframes(key) {
  // Keyframes is already prefixed. e.g. key = '@-webkit-keyframes a'
  if (key[1] === '-') return key; // No need to prefix IE/Edge. Older browsers will ignore unsupported rules.
  // https://caniuse.com/#search=keyframes

  if (prefix.js === 'ms') return key;
  return "@" + prefix.css + "keyframes" + key.substr(10);
}

// https://caniuse.com/#search=appearance

var appearence = {
  noPrefill: ['appearance'],
  supportedProperty: function supportedProperty(prop) {
    if (prop !== 'appearance') return false;
    if (prefix.js === 'ms') return "-webkit-" + prop;
    return prefix.css + prop;
  }
};

var regExp = /[-\s]+(.)?/g;
/**
 * Replaces the letter with the capital letter
 *
 * @param {String} match
 * @param {String} c
 * @return {String}
 * @api private
 */

function toUpper(match, c) {
  return c ? c.toUpperCase() : '';
}
/**
 * Convert dash separated strings to camel-cased.
 *
 * @param {String} str
 * @return {String}
 * @api private
 */


function camelize(str) {
  return str.replace(regExp, toUpper);
}

/**
 * Convert dash separated strings to pascal cased.
 *
 * @param {String} str
 * @return {String}
 * @api private
 */

function pascalize(str) {
  return camelize("-" + str);
}

// https://caniuse.com/#search=multicolumn
// https://github.com/postcss/autoprefixer/issues/491
// https://github.com/postcss/autoprefixer/issues/177

var breakPropsOld = {
  supportedProperty: function supportedProperty(prop, style) {
    if (!/^break-/.test(prop)) return false;

    if (prefix.js === 'Webkit') {
      var jsProp = "WebkitColumn" + pascalize(prop);
      return jsProp in style ? prefix.css + "column-" + prop : false;
    }

    if (prefix.js === 'Moz') {
      var _jsProp = "page" + pascalize(prop);

      return _jsProp in style ? "page-" + prop : false;
    }

    return false;
  }
};

// https://caniuse.com/#search=color-adjust

var colorAdjust = {
  noPrefill: ['color-adjust'],
  supportedProperty: function supportedProperty(prop) {
    if (prop !== 'color-adjust') return false;
    if (prefix.js === 'Webkit') return prefix.css + "print-" + prop;
    return prop;
  }
};

var propMap = {
  flex: 'box-flex',
  'flex-grow': 'box-flex',
  'flex-direction': ['box-orient', 'box-direction'],
  order: 'box-ordinal-group',
  'align-items': 'box-align',
  'flex-flow': ['box-orient', 'box-direction'],
  'justify-content': 'box-pack'
};
var propKeys = Object.keys(propMap);

var prefixCss = function prefixCss(p) {
  return prefix.css + p;
}; // Support old flex spec from 2009.


var flex2009 = {
  supportedProperty: function supportedProperty(prop, style, _ref) {
    var multiple = _ref.multiple;

    if (propKeys.indexOf(prop) > -1) {
      var newProp = propMap[prop];

      if (!Array.isArray(newProp)) {
        return prefix.js + pascalize(newProp) in style ? prefix.css + newProp : false;
      }

      if (!multiple) return false;

      for (var i = 0; i < newProp.length; i++) {
        if (!(prefix.js + pascalize(newProp[0]) in style)) {
          return false;
        }
      }

      return newProp.map(prefixCss);
    }

    return false;
  }
};

var propMap$1 = {
  'flex-grow': 'flex-positive',
  'flex-shrink': 'flex-negative',
  'flex-basis': 'flex-preferred-size',
  'justify-content': 'flex-pack',
  order: 'flex-order',
  'align-items': 'flex-align',
  'align-content': 'flex-line-pack' // 'align-self' is handled by 'align-self' plugin.
  // Support old flex spec from 2012.

};
var flex2012 = {
  supportedProperty: function supportedProperty(prop, style) {
    var newProp = propMap$1[prop];
    if (!newProp) return false;
    return prefix.js + pascalize(newProp) in style ? prefix.css + newProp : false;
  }
};

// See https://github.com/postcss/autoprefixer/issues/324.

var inlineLogicalOld = {
  supportedProperty: function supportedProperty(prop, style) {
    if (!/^(border|margin|padding)-inline/.test(prop)) return false;
    if (prefix.js === 'Moz') return prop;
    var newProp = prop.replace('-inline', '');
    return prefix.js + pascalize(newProp) in style ? prefix.css + newProp : false;
  }
};

// but we can use a longhand property instead.
// https://caniuse.com/#search=mask

var mask = {
  noPrefill: ['mask'],
  supportedProperty: function supportedProperty(prop, style) {
    if (!/^mask/.test(prop)) return false;

    if (prefix.js === 'Webkit') {
      var longhand = 'mask-image';

      if (camelize(longhand) in style) {
        return prop;
      }

      if (prefix.js + pascalize(longhand) in style) {
        return prefix.css + prop;
      }
    }

    return prop;
  }
};

// https://caniuse.com/#search=overscroll-behavior

var overscrollBehavior = {
  supportedProperty: function supportedProperty(prop) {
    if (prop !== 'overscroll-behavior') return false;

    if (prefix.js === 'ms') {
      return prefix.css + "scroll-chaining";
    }

    return prop;
  }
};

var prefixed = {
  supportedProperty: function supportedProperty(prop, style) {
    var pascalized = pascalize(prop); // Return custom CSS variable without prefixing.

    if (prop[0] === '-') return prop; // Return already prefixed value without prefixing.

    if (prop[0] === '-' && prop[1] === '-') return prop;
    if (prefix.js + pascalized in style) return prefix.css + prop; // Try webkit fallback.

    if (prefix.js !== 'Webkit' && "Webkit" + pascalized in style) return "-webkit-" + prop;
    return false;
  }
};

// https://caniuse.com/#search=scroll-snap

var scrollSnap = {
  supportedProperty: function supportedProperty(prop) {
    if (prop.substring(0, 11) !== 'scroll-snap') return false;

    if (prefix.js === 'ms') {
      return "" + prefix.css + prop;
    }

    return prop;
  }
};

// https://caniuse.com/#search=text-orientation

var textOrientation = {
  noPrefill: ['text-orientation'],
  supportedProperty: function supportedProperty(prop) {
    if (prop !== 'text-orientation') return false;

    if (prefix.vendor === 'apple' && !prefix.isTouch) {
      return prefix.css + prop;
    }

    return prop;
  }
};

// https://caniuse.com/#search=transform

var transform = {
  noPrefill: ['transform'],
  supportedProperty: function supportedProperty(prop, style, options) {
    if (prop !== 'transform') return false;

    if (options.transform) {
      return prop;
    }

    return prefix.css + prop;
  }
};

// https://caniuse.com/#search=transition

var transition = {
  noPrefill: ['transition'],
  supportedProperty: function supportedProperty(prop, style, options) {
    if (prop !== 'transition') return false;

    if (options.transition) {
      return prop;
    }

    return prefix.css + prop;
  }
};

// Camelization is required because we can't test using.
// CSS syntax for e.g. in FF.

var unprefixed = {
  supportedProperty: function supportedProperty(prop, style) {
    return camelize(prop) in style ? prop : false;
  }
};

// https://caniuse.com/#search=writing-mode

var writingMode = {
  noPrefill: ['writing-mode'],
  supportedProperty: function supportedProperty(prop) {
    if (prop !== 'writing-mode') return false;

    if (prefix.js === 'Webkit' || prefix.js === 'ms') {
      return prefix.css + prop;
    }

    return prop;
  }
};

// plugins = [
//   ...plugins,
//    breakPropsOld,
//    inlineLogicalOld,
//    unprefixed,
//    prefixed,
//    scrollSnap,
//    flex2012,
//    flex2009
// ]
// Plugins without 'noPrefill' value, going last.
// 'flex-*' plugins should be at the bottom.
// 'flex2009' going after 'flex2012'.
// 'prefixed' going after 'unprefixed'

var plugins = [appearence, colorAdjust, mask, textOrientation, transform, transition, writingMode, breakPropsOld, inlineLogicalOld, unprefixed, prefixed, scrollSnap, overscrollBehavior, flex2012, flex2009];
var propertyDetectors = plugins.filter(function (p) {
  return p.supportedProperty;
}).map(function (p) {
  return p.supportedProperty;
});
var noPrefill = plugins.filter(function (p) {
  return p.noPrefill;
}).reduce(function (a, p) {
  a.push.apply(a, _toConsumableArray(p.noPrefill));
  return a;
}, []);

var el;
var cache = {};

if (isBrowser) {
  el = document.createElement('p'); // We test every property on vendor prefix requirement.
  // Once tested, result is cached. It gives us up to 70% perf boost.
  // http://jsperf.com/element-style-object-access-vs-plain-object
  //
  // Prefill cache with known css properties to reduce amount of
  // properties we need to feature test at runtime.
  // http://davidwalsh.name/vendor-prefix

  var computed = window.getComputedStyle(document.documentElement, '');

  for (var key$1 in computed) {
    // eslint-disable-next-line no-restricted-globals
    if (!isNaN(key$1)) cache[computed[key$1]] = computed[key$1];
  } // Properties that cannot be correctly detected using the
  // cache prefill method.


  noPrefill.forEach(function (x) {
    return delete cache[x];
  });
}
/**
 * Test if a property is supported, returns supported property with vendor
 * prefix if required. Returns `false` if not supported.
 *
 * @param {String} prop dash separated
 * @param {Object} [options]
 * @return {String|Boolean}
 * @api public
 */


function supportedProperty(prop, options) {
  if (options === void 0) {
    options = {};
  }

  // For server-side rendering.
  if (!el) return prop; // Remove cache for benchmark tests or return property from the cache.

  if (cache[prop] != null) {
    return cache[prop];
  } // Check if 'transition' or 'transform' natively supported in browser.


  if (prop === 'transition' || prop === 'transform') {
    options[prop] = prop in el.style;
  } // Find a plugin for current prefix property.


  for (var i = 0; i < propertyDetectors.length; i++) {
    cache[prop] = propertyDetectors[i](prop, el.style, options); // Break loop, if value found.

    if (cache[prop]) break;
  } // Reset styles for current property.
  // Firefox can even throw an error for invalid properties, e.g., "0".


  try {
    el.style[prop] = '';
  } catch (err) {
    return false;
  }

  return cache[prop];
}

var cache$1 = {};
var transitionProperties = {
  transition: 1,
  'transition-property': 1,
  '-webkit-transition': 1,
  '-webkit-transition-property': 1
};
var transPropsRegExp = /(^\s*[\w-]+)|, (\s*[\w-]+)(?![^()]*\))/g;
var el$1;
/**
 * Returns prefixed value transition/transform if needed.
 *
 * @param {String} match
 * @param {String} p1
 * @param {String} p2
 * @return {String}
 * @api private
 */

function prefixTransitionCallback(match, p1, p2) {
  if (p1 === 'var') return 'var';
  if (p1 === 'all') return 'all';
  if (p2 === 'all') return ', all';
  return p1 ? supportedProperty(p1) : ", " + supportedProperty(p2);
}

if (isBrowser) el$1 = document.createElement('p');
/**
 * Returns prefixed value if needed. Returns `false` if value is not supported.
 *
 * @param {String} property
 * @param {String} value
 * @return {String|Boolean}
 * @api public
 */

function supportedValue(property, value) {
  // For server-side rendering.
  var prefixedValue = value;
  if (!el$1 || property === 'content') return value; // It is a string or a number as a string like '1'.
  // We want only prefixable values here.
  // eslint-disable-next-line no-restricted-globals

  if (typeof prefixedValue !== 'string' || !isNaN(parseInt(prefixedValue, 10))) {
    return prefixedValue;
  } // Create cache key for current value.


  var cacheKey = property + prefixedValue; // Remove cache for benchmark tests or return value from cache.

  if (cache$1[cacheKey] != null) {
    return cache$1[cacheKey];
  } // IE can even throw an error in some cases, for e.g. style.content = 'bar'.


  try {
    // Test value as it is.
    el$1.style[property] = prefixedValue;
  } catch (err) {
    // Return false if value not supported.
    cache$1[cacheKey] = false;
    return false;
  } // If 'transition' or 'transition-property' property.


  if (transitionProperties[property]) {
    prefixedValue = prefixedValue.replace(transPropsRegExp, prefixTransitionCallback);
  } else if (el$1.style[property] === '') {
    // Value with a vendor prefix.
    prefixedValue = prefix.css + prefixedValue; // Hardcode test to convert "flex" to "-ms-flexbox" for IE10.

    if (prefixedValue === '-ms-flex') el$1.style[property] = '-ms-flexbox'; // Test prefixed value.

    el$1.style[property] = prefixedValue; // Return false if value not supported.

    if (el$1.style[property] === '') {
      cache$1[cacheKey] = false;
      return false;
    }
  } // Reset styles for current property.


  el$1.style[property] = ''; // Write current value to cache.

  cache$1[cacheKey] = prefixedValue;
  return cache$1[cacheKey];
}

function _extends() {
  _extends = Object.assign || function (target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i];

      for (var key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[key] = source[key];
        }
      }
    }

    return target;
  };

  return _extends.apply(this, arguments);
}

function warning(condition, message) {
  {
    if (condition) {
      return;
    }

    var text = "Warning: " + message;

    if (typeof console !== 'undefined') {
      console.warn(text);
    }

    try {
      throw Error(text);
    } catch (x) {}
  }
}

function _defineProperties(target, props) {
  for (var i = 0; i < props.length; i++) {
    var descriptor = props[i];
    descriptor.enumerable = descriptor.enumerable || false;
    descriptor.configurable = true;
    if ("value" in descriptor) descriptor.writable = true;
    Object.defineProperty(target, descriptor.key, descriptor);
  }
}

function _createClass(Constructor, protoProps, staticProps) {
  if (protoProps) _defineProperties(Constructor.prototype, protoProps);
  if (staticProps) _defineProperties(Constructor, staticProps);
  return Constructor;
}

function _inheritsLoose(subClass, superClass) {
  subClass.prototype = Object.create(superClass.prototype);
  subClass.prototype.constructor = subClass;
  subClass.__proto__ = superClass;
}

function _assertThisInitialized(self) {
  if (self === void 0) {
    throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
  }

  return self;
}

function _objectWithoutPropertiesLoose(source, excluded) {
  if (source == null) return {};
  var target = {};
  var sourceKeys = Object.keys(source);
  var key, i;

  for (i = 0; i < sourceKeys.length; i++) {
    key = sourceKeys[i];
    if (excluded.indexOf(key) >= 0) continue;
    target[key] = source[key];
  }

  return target;
}

var plainObjectConstrurctor = {}.constructor;

function cloneStyle(style) {
  if (style == null || typeof style !== 'object') return style;
  if (Array.isArray(style)) return style.map(cloneStyle);
  if (style.constructor !== plainObjectConstrurctor) return style;
  var newStyle = {};

  for (var name in style) {
    newStyle[name] = cloneStyle(style[name]);
  }

  return newStyle;
}
/**
 * Create a rule instance.
 */


function createRule(name, decl, options) {
  if (name === void 0) {
    name = 'unnamed';
  }

  var jss = options.jss;
  var declCopy = cloneStyle(decl);
  var rule = jss.plugins.onCreateRule(name, declCopy, options);
  if (rule) return rule; // It is an at-rule and it has no instance.

  if (name[0] === '@') {
    warning(false, "[JSS] Unknown rule " + name);
  }

  return null;
}

var join = function join(value, by) {
  var result = '';

  for (var i = 0; i < value.length; i++) {
    // Remove !important from the value, it will be readded later.
    if (value[i] === '!important') break;
    if (result) result += by;
    result += value[i];
  }

  return result;
};
/**
 * Converts array values to string.
 *
 * `margin: [['5px', '10px']]` > `margin: 5px 10px;`
 * `border: ['1px', '2px']` > `border: 1px, 2px;`
 * `margin: [['5px', '10px'], '!important']` > `margin: 5px 10px !important;`
 * `color: ['red', !important]` > `color: red !important;`
 */


function toCssValue(value, ignoreImportant) {
  if (ignoreImportant === void 0) {
    ignoreImportant = false;
  }

  if (!Array.isArray(value)) return value;
  var cssValue = ''; // Support space separated values via `[['5px', '10px']]`.

  if (Array.isArray(value[0])) {
    for (var i = 0; i < value.length; i++) {
      if (value[i] === '!important') break;
      if (cssValue) cssValue += ', ';
      cssValue += join(value[i], ' ');
    }
  } else cssValue = join(value, ', '); // Add !important, because it was ignored.


  if (!ignoreImportant && value[value.length - 1] === '!important') {
    cssValue += ' !important';
  }

  return cssValue;
}
/**
 * Indent a string.
 * http://jsperf.com/array-join-vs-for
 */


function indentStr(str, indent) {
  var result = '';

  for (var index = 0; index < indent; index++) {
    result += '  ';
  }

  return result + str;
}
/**
 * Converts a Rule to CSS string.
 */


function toCss(selector, style, options) {
  if (options === void 0) {
    options = {};
  }

  var result = '';
  if (!style) return result;
  var _options = options,
      _options$indent = _options.indent,
      indent = _options$indent === void 0 ? 0 : _options$indent;
  var fallbacks = style.fallbacks;
  if (selector) indent++; // Apply fallbacks first.

  if (fallbacks) {
    // Array syntax {fallbacks: [{prop: value}]}
    if (Array.isArray(fallbacks)) {
      for (var index = 0; index < fallbacks.length; index++) {
        var fallback = fallbacks[index];

        for (var prop in fallback) {
          var value = fallback[prop];

          if (value != null) {
            if (result) result += '\n';
            result += "" + indentStr(prop + ": " + toCssValue(value) + ";", indent);
          }
        }
      }
    } else {
      // Object syntax {fallbacks: {prop: value}}
      for (var _prop in fallbacks) {
        var _value = fallbacks[_prop];

        if (_value != null) {
          if (result) result += '\n';
          result += "" + indentStr(_prop + ": " + toCssValue(_value) + ";", indent);
        }
      }
    }
  }

  for (var _prop2 in style) {
    var _value2 = style[_prop2];

    if (_value2 != null && _prop2 !== 'fallbacks') {
      if (result) result += '\n';
      result += "" + indentStr(_prop2 + ": " + toCssValue(_value2) + ";", indent);
    }
  } // Allow empty style in this case, because properties will be added dynamically.


  if (!result && !options.allowEmpty) return result; // When rule is being stringified before selector was defined.

  if (!selector) return result;
  indent--;
  if (result) result = "\n" + result + "\n";
  return indentStr(selector + " {" + result, indent) + indentStr('}', indent);
}

var escapeRegex = /([[\].#*$><+~=|^:(),"'`\s])/g;
var nativeEscape = typeof CSS !== 'undefined' && CSS.escape;

var escape = function escape(str) {
  return nativeEscape ? nativeEscape(str) : str.replace(escapeRegex, '\\$1');
};

var BaseStyleRule =
/*#__PURE__*/
function () {
  function BaseStyleRule(key, style, options) {
    this.type = 'style';
    this.key = void 0;
    this.isProcessed = false;
    this.style = void 0;
    this.renderer = void 0;
    this.renderable = void 0;
    this.options = void 0;
    var sheet = options.sheet,
        Renderer = options.Renderer;
    this.key = key;
    this.options = options;
    this.style = style;
    if (sheet) this.renderer = sheet.renderer;else if (Renderer) this.renderer = new Renderer();
  }
  /**
   * Get or set a style property.
   */


  var _proto = BaseStyleRule.prototype;

  _proto.prop = function prop(name, value, options) {
    // It's a getter.
    if (value === undefined) return this.style[name]; // Don't do anything if the value has not changed.

    var force = options ? options.force : false;
    if (!force && this.style[name] === value) return this;
    var newValue = value;

    if (!options || options.process !== false) {
      newValue = this.options.jss.plugins.onChangeValue(value, name, this);
    }

    var isEmpty = newValue == null || newValue === false;
    var isDefined = name in this.style; // Value is empty and wasn't defined before.

    if (isEmpty && !isDefined && !force) return this; // We are going to remove this value.

    var remove = isEmpty && isDefined;
    if (remove) delete this.style[name];else this.style[name] = newValue; // Renderable is defined if StyleSheet option `link` is true.

    if (this.renderable && this.renderer) {
      if (remove) this.renderer.removeProperty(this.renderable, name);else this.renderer.setProperty(this.renderable, name, newValue);
      return this;
    }

    var sheet = this.options.sheet;

    if (sheet && sheet.attached) {
      warning(false, '[JSS] Rule is not linked. Missing sheet option "link: true".');
    }

    return this;
  };

  return BaseStyleRule;
}();

var StyleRule =
/*#__PURE__*/
function (_BaseStyleRule) {
  _inheritsLoose(StyleRule, _BaseStyleRule);

  function StyleRule(key, style, options) {
    var _this;

    _this = _BaseStyleRule.call(this, key, style, options) || this;
    _this.selectorText = void 0;
    _this.id = void 0;
    _this.renderable = void 0;
    var selector = options.selector,
        scoped = options.scoped,
        sheet = options.sheet,
        generateId = options.generateId;

    if (selector) {
      _this.selectorText = selector;
    } else if (scoped !== false) {
      _this.id = generateId(_assertThisInitialized(_assertThisInitialized(_this)), sheet);
      _this.selectorText = "." + escape(_this.id);
    }

    return _this;
  }
  /**
   * Set selector string.
   * Attention: use this with caution. Most browsers didn't implement
   * selectorText setter, so this may result in rerendering of entire Style Sheet.
   */


  var _proto2 = StyleRule.prototype;
  /**
   * Apply rule to an element inline.
   */

  _proto2.applyTo = function applyTo(renderable) {
    var renderer = this.renderer;

    if (renderer) {
      var json = this.toJSON();

      for (var prop in json) {
        renderer.setProperty(renderable, prop, json[prop]);
      }
    }

    return this;
  }
  /**
   * Returns JSON representation of the rule.
   * Fallbacks are not supported.
   * Useful for inline styles.
   */
  ;

  _proto2.toJSON = function toJSON() {
    var json = {};

    for (var prop in this.style) {
      var value = this.style[prop];
      if (typeof value !== 'object') json[prop] = value;else if (Array.isArray(value)) json[prop] = toCssValue(value);
    }

    return json;
  }
  /**
   * Generates a CSS string.
   */
  ;

  _proto2.toString = function toString(options) {
    var sheet = this.options.sheet;
    var link = sheet ? sheet.options.link : false;
    var opts = link ? _extends({}, options, {
      allowEmpty: true
    }) : options;
    return toCss(this.selectorText, this.style, opts);
  };

  _createClass(StyleRule, [{
    key: "selector",
    set: function set(selector) {
      if (selector === this.selectorText) return;
      this.selectorText = selector;
      var renderer = this.renderer,
          renderable = this.renderable;
      if (!renderable || !renderer) return;
      var hasChanged = renderer.setSelector(renderable, selector); // If selector setter is not implemented, rerender the rule.

      if (!hasChanged) {
        renderer.replaceRule(renderable, this);
      }
    }
    /**
     * Get selector string.
     */
    ,
    get: function get() {
      return this.selectorText;
    }
  }]);

  return StyleRule;
}(BaseStyleRule);

var pluginStyleRule = {
  onCreateRule: function onCreateRule(name, style, options) {
    if (name[0] === '@' || options.parent && options.parent.type === 'keyframes') {
      return null;
    }

    return new StyleRule(name, style, options);
  }
};
var defaultToStringOptions = {
  indent: 1,
  children: true
};
var atRegExp = /@([\w-]+)/;
/**
 * Conditional rule for @media, @supports
 */

var ConditionalRule =
/*#__PURE__*/
function () {
  function ConditionalRule(key, styles, options) {
    this.type = 'conditional';
    this.at = void 0;
    this.key = void 0;
    this.rules = void 0;
    this.options = void 0;
    this.isProcessed = false;
    this.renderable = void 0;
    this.key = key;
    var atMatch = key.match(atRegExp);
    this.at = atMatch ? atMatch[1] : 'unknown';
    this.options = options;
    this.rules = new RuleList(_extends({}, options, {
      parent: this
    }));

    for (var name in styles) {
      this.rules.add(name, styles[name]);
    }

    this.rules.process();
  }
  /**
   * Get a rule.
   */


  var _proto = ConditionalRule.prototype;

  _proto.getRule = function getRule(name) {
    return this.rules.get(name);
  }
  /**
   * Get index of a rule.
   */
  ;

  _proto.indexOf = function indexOf(rule) {
    return this.rules.indexOf(rule);
  }
  /**
   * Create and register rule, run plugins.
   */
  ;

  _proto.addRule = function addRule(name, style, options) {
    var rule = this.rules.add(name, style, options);
    if (!rule) return null;
    this.options.jss.plugins.onProcessRule(rule);
    return rule;
  }
  /**
   * Generates a CSS string.
   */
  ;

  _proto.toString = function toString(options) {
    if (options === void 0) {
      options = defaultToStringOptions;
    }

    if (options.indent == null) options.indent = defaultToStringOptions.indent;
    if (options.children == null) options.children = defaultToStringOptions.children;

    if (options.children === false) {
      return this.key + " {}";
    }

    var children = this.rules.toString(options);
    return children ? this.key + " {\n" + children + "\n}" : '';
  };

  return ConditionalRule;
}();

var keyRegExp = /@media|@supports\s+/;
var pluginConditionalRule = {
  onCreateRule: function onCreateRule(key, styles, options) {
    return keyRegExp.test(key) ? new ConditionalRule(key, styles, options) : null;
  }
};
var defaultToStringOptions$1 = {
  indent: 1,
  children: true
};
var nameRegExp = /@keyframes\s+([\w-]+)/;
/**
 * Rule for @keyframes
 */

var KeyframesRule =
/*#__PURE__*/
function () {
  function KeyframesRule(key, frames, options) {
    this.type = 'keyframes';
    this.at = '@keyframes';
    this.key = void 0;
    this.name = void 0;
    this.id = void 0;
    this.rules = void 0;
    this.options = void 0;
    this.isProcessed = false;
    this.renderable = void 0;
    var nameMatch = key.match(nameRegExp);

    if (nameMatch && nameMatch[1]) {
      this.name = nameMatch[1];
    } else {
      this.name = 'noname';
      warning(false, "[JSS] Bad keyframes name " + key);
    }

    this.key = this.type + "-" + this.name;
    this.options = options;
    var scoped = options.scoped,
        sheet = options.sheet,
        generateId = options.generateId;
    this.id = scoped === false ? this.name : escape(generateId(this, sheet));
    this.rules = new RuleList(_extends({}, options, {
      parent: this
    }));

    for (var name in frames) {
      this.rules.add(name, frames[name], _extends({}, options, {
        parent: this
      }));
    }

    this.rules.process();
  }
  /**
   * Generates a CSS string.
   */


  var _proto = KeyframesRule.prototype;

  _proto.toString = function toString(options) {
    if (options === void 0) {
      options = defaultToStringOptions$1;
    }

    if (options.indent == null) options.indent = defaultToStringOptions$1.indent;
    if (options.children == null) options.children = defaultToStringOptions$1.children;

    if (options.children === false) {
      return this.at + " " + this.id + " {}";
    }

    var children = this.rules.toString(options);
    if (children) children = "\n" + children + "\n";
    return this.at + " " + this.id + " {" + children + "}";
  };

  return KeyframesRule;
}();

var keyRegExp$1 = /@keyframes\s+/;
var refRegExp = /\$([\w-]+)/g;

var findReferencedKeyframe = function findReferencedKeyframe(val, keyframes) {
  if (typeof val === 'string') {
    return val.replace(refRegExp, function (match, name) {
      if (name in keyframes) {
        return keyframes[name];
      }

      warning(false, "[JSS] Referenced keyframes rule \"" + name + "\" is not defined.");
      return match;
    });
  }

  return val;
};
/**
 * Replace the reference for a animation name.
 */


var replaceRef = function replaceRef(style, prop, keyframes) {
  var value = style[prop];
  var refKeyframe = findReferencedKeyframe(value, keyframes);

  if (refKeyframe !== value) {
    style[prop] = refKeyframe;
  }
};

var plugin = {
  onCreateRule: function onCreateRule(key, frames, options) {
    return typeof key === 'string' && keyRegExp$1.test(key) ? new KeyframesRule(key, frames, options) : null;
  },
  // Animation name ref replacer.
  onProcessStyle: function onProcessStyle(style, rule, sheet) {
    if (rule.type !== 'style' || !sheet) return style;
    if ('animation-name' in style) replaceRef(style, 'animation-name', sheet.keyframes);
    if ('animation' in style) replaceRef(style, 'animation', sheet.keyframes);
    return style;
  },
  onChangeValue: function onChangeValue(val, prop, rule) {
    var sheet = rule.options.sheet;

    if (!sheet) {
      return val;
    }

    switch (prop) {
      case 'animation':
        return findReferencedKeyframe(val, sheet.keyframes);

      case 'animation-name':
        return findReferencedKeyframe(val, sheet.keyframes);

      default:
        return val;
    }
  }
};

var KeyframeRule =
/*#__PURE__*/
function (_BaseStyleRule) {
  _inheritsLoose(KeyframeRule, _BaseStyleRule);

  function KeyframeRule() {
    var _this;

    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    _this = _BaseStyleRule.call.apply(_BaseStyleRule, [this].concat(args)) || this;
    _this.renderable = void 0;
    return _this;
  }

  var _proto = KeyframeRule.prototype;
  /**
   * Generates a CSS string.
   */

  _proto.toString = function toString(options) {
    var sheet = this.options.sheet;
    var link = sheet ? sheet.options.link : false;
    var opts = link ? _extends({}, options, {
      allowEmpty: true
    }) : options;
    return toCss(this.key, this.style, opts);
  };

  return KeyframeRule;
}(BaseStyleRule);

var pluginKeyframeRule = {
  onCreateRule: function onCreateRule(key, style, options) {
    if (options.parent && options.parent.type === 'keyframes') {
      return new KeyframeRule(key, style, options);
    }

    return null;
  }
};

var FontFaceRule =
/*#__PURE__*/
function () {
  function FontFaceRule(key, style, options) {
    this.type = 'font-face';
    this.at = '@font-face';
    this.key = void 0;
    this.style = void 0;
    this.options = void 0;
    this.isProcessed = false;
    this.renderable = void 0;
    this.key = key;
    this.style = style;
    this.options = options;
  }
  /**
   * Generates a CSS string.
   */


  var _proto = FontFaceRule.prototype;

  _proto.toString = function toString(options) {
    if (Array.isArray(this.style)) {
      var str = '';

      for (var index = 0; index < this.style.length; index++) {
        str += toCss(this.key, this.style[index]);
        if (this.style[index + 1]) str += '\n';
      }

      return str;
    }

    return toCss(this.key, this.style, options);
  };

  return FontFaceRule;
}();

var pluginFontFaceRule = {
  onCreateRule: function onCreateRule(key, style, options) {
    return key === '@font-face' ? new FontFaceRule(key, style, options) : null;
  }
};

var ViewportRule =
/*#__PURE__*/
function () {
  function ViewportRule(key, style, options) {
    this.type = 'viewport';
    this.at = '@viewport';
    this.key = void 0;
    this.style = void 0;
    this.options = void 0;
    this.isProcessed = false;
    this.renderable = void 0;
    this.key = key;
    this.style = style;
    this.options = options;
  }
  /**
   * Generates a CSS string.
   */


  var _proto = ViewportRule.prototype;

  _proto.toString = function toString(options) {
    return toCss(this.key, this.style, options);
  };

  return ViewportRule;
}();

var pluginViewportRule = {
  onCreateRule: function onCreateRule(key, style, options) {
    return key === '@viewport' || key === '@-ms-viewport' ? new ViewportRule(key, style, options) : null;
  }
};

var SimpleRule =
/*#__PURE__*/
function () {
  function SimpleRule(key, value, options) {
    this.type = 'simple';
    this.key = void 0;
    this.value = void 0;
    this.options = void 0;
    this.isProcessed = false;
    this.renderable = void 0;
    this.key = key;
    this.value = value;
    this.options = options;
  }
  /**
   * Generates a CSS string.
   */
  // eslint-disable-next-line no-unused-vars


  var _proto = SimpleRule.prototype;

  _proto.toString = function toString(options) {
    if (Array.isArray(this.value)) {
      var str = '';

      for (var index = 0; index < this.value.length; index++) {
        str += this.key + " " + this.value[index] + ";";
        if (this.value[index + 1]) str += '\n';
      }

      return str;
    }

    return this.key + " " + this.value + ";";
  };

  return SimpleRule;
}();

var keysMap = {
  '@charset': true,
  '@import': true,
  '@namespace': true
};
var pluginSimpleRule = {
  onCreateRule: function onCreateRule(key, value, options) {
    return key in keysMap ? new SimpleRule(key, value, options) : null;
  }
};
var plugins$1 = [pluginStyleRule, pluginConditionalRule, plugin, pluginKeyframeRule, pluginFontFaceRule, pluginViewportRule, pluginSimpleRule];
var defaultUpdateOptions = {
  process: true
};
var forceUpdateOptions = {
  force: true,
  process: true
  /**
   * Contains rules objects and allows adding/removing etc.
   * Is used for e.g. by `StyleSheet` or `ConditionalRule`.
   */

};

var RuleList =
/*#__PURE__*/
function () {
  // Rules registry for access by .get() method.
  // It contains the same rule registered by name and by selector.
  // Original styles object.
  // Used to ensure correct rules order.
  function RuleList(options) {
    this.map = {};
    this.raw = {};
    this.index = [];
    this.options = void 0;
    this.classes = void 0;
    this.keyframes = void 0;
    this.options = options;
    this.classes = options.classes;
    this.keyframes = options.keyframes;
  }
  /**
   * Create and register rule.
   *
   * Will not render after Style Sheet was rendered the first time.
   */


  var _proto = RuleList.prototype;

  _proto.add = function add(key, decl, ruleOptions) {
    var _this$options = this.options,
        parent = _this$options.parent,
        sheet = _this$options.sheet,
        jss = _this$options.jss,
        Renderer = _this$options.Renderer,
        generateId = _this$options.generateId,
        scoped = _this$options.scoped;

    var options = _extends({
      classes: this.classes,
      parent: parent,
      sheet: sheet,
      jss: jss,
      Renderer: Renderer,
      generateId: generateId,
      scoped: scoped
    }, ruleOptions); // We need to save the original decl before creating the rule
    // because cache plugin needs to use it as a key to return a cached rule.


    this.raw[key] = decl;

    if (key in this.classes) {
      // For e.g. rules inside of @media container
      options.selector = "." + escape(this.classes[key]);
    }

    var rule = createRule(key, decl, options);
    if (!rule) return null;
    this.register(rule);
    var index = options.index === undefined ? this.index.length : options.index;
    this.index.splice(index, 0, rule);
    return rule;
  }
  /**
   * Get a rule.
   */
  ;

  _proto.get = function get(name) {
    return this.map[name];
  }
  /**
   * Delete a rule.
   */
  ;

  _proto.remove = function remove(rule) {
    this.unregister(rule);
    delete this.raw[rule.key];
    this.index.splice(this.indexOf(rule), 1);
  }
  /**
   * Get index of a rule.
   */
  ;

  _proto.indexOf = function indexOf(rule) {
    return this.index.indexOf(rule);
  }
  /**
   * Run `onProcessRule()` plugins on every rule.
   */
  ;

  _proto.process = function process() {
    var plugins$$1 = this.options.jss.plugins; // We need to clone array because if we modify the index somewhere else during a loop
    // we end up with very hard-to-track-down side effects.

    this.index.slice(0).forEach(plugins$$1.onProcessRule, plugins$$1);
  }
  /**
   * Register a rule in `.map` and `.classes` maps.
   */
  ;

  _proto.register = function register(rule) {
    this.map[rule.key] = rule;

    if (rule instanceof StyleRule) {
      this.map[rule.selector] = rule;
      if (rule.id) this.classes[rule.key] = rule.id;
    } else if (rule instanceof KeyframesRule && this.keyframes) {
      this.keyframes[rule.name] = rule.id;
    }
  }
  /**
   * Unregister a rule.
   */
  ;

  _proto.unregister = function unregister(rule) {
    delete this.map[rule.key];

    if (rule instanceof StyleRule) {
      delete this.map[rule.selector];
      delete this.classes[rule.key];
    } else if (rule instanceof KeyframesRule) {
      delete this.keyframes[rule.name];
    }
  }
  /**
   * Update the function values with a new data.
   */
  ;

  _proto.update = function update() {
    var name;
    var data;
    var options;

    if (typeof (arguments.length <= 0 ? undefined : arguments[0]) === 'string') {
      name = arguments.length <= 0 ? undefined : arguments[0]; // $FlowFixMe

      data = arguments.length <= 1 ? undefined : arguments[1]; // $FlowFixMe

      options = arguments.length <= 2 ? undefined : arguments[2];
    } else {
      data = arguments.length <= 0 ? undefined : arguments[0]; // $FlowFixMe

      options = arguments.length <= 1 ? undefined : arguments[1];
      name = null;
    }

    if (name) {
      this.onUpdate(data, this.get(name), options);
    } else {
      for (var index = 0; index < this.index.length; index++) {
        this.onUpdate(data, this.index[index], options);
      }
    }
  }
  /**
   * Execute plugins, update rule props.
   */
  ;

  _proto.onUpdate = function onUpdate(data, rule, options) {
    if (options === void 0) {
      options = defaultUpdateOptions;
    }

    var _this$options2 = this.options,
        plugins$$1 = _this$options2.jss.plugins,
        sheet = _this$options2.sheet; // It is a rules container like for e.g. ConditionalRule.

    if (rule.rules instanceof RuleList) {
      rule.rules.update(data, options);
      return;
    }

    var styleRule = rule;
    var style = styleRule.style;
    plugins$$1.onUpdate(data, rule, sheet, options); // We rely on a new `style` ref in case it was mutated during onUpdate hook.

    if (options.process && style && style !== styleRule.style) {
      // We need to run the plugins in case new `style` relies on syntax plugins.
      plugins$$1.onProcessStyle(styleRule.style, styleRule, sheet); // Update and add props.

      for (var prop in styleRule.style) {
        var nextValue = styleRule.style[prop];
        var prevValue = style[prop]; // We need to use `force: true` because `rule.style` has been updated during onUpdate hook, so `rule.prop()` will not update the CSSOM rule.
        // We do this comparison to avoid unneeded `rule.prop()` calls, since we have the old `style` object here.

        if (nextValue !== prevValue) {
          styleRule.prop(prop, nextValue, forceUpdateOptions);
        }
      } // Remove props.


      for (var _prop in style) {
        var _nextValue = styleRule.style[_prop];
        var _prevValue = style[_prop]; // We need to use `force: true` because `rule.style` has been updated during onUpdate hook, so `rule.prop()` will not update the CSSOM rule.
        // We do this comparison to avoid unneeded `rule.prop()` calls, since we have the old `style` object here.

        if (_nextValue == null && _nextValue !== _prevValue) {
          styleRule.prop(_prop, null, forceUpdateOptions);
        }
      }
    }
  }
  /**
   * Convert rules to a CSS string.
   */
  ;

  _proto.toString = function toString(options) {
    var str = '';
    var sheet = this.options.sheet;
    var link = sheet ? sheet.options.link : false;

    for (var index = 0; index < this.index.length; index++) {
      var rule = this.index[index];
      var css = rule.toString(options); // No need to render an empty rule.

      if (!css && !link) continue;
      if (str) str += '\n';
      str += css;
    }

    return str;
  };

  return RuleList;
}();

var StyleSheet =
/*#__PURE__*/
function () {
  function StyleSheet(styles, options) {
    this.options = void 0;
    this.deployed = void 0;
    this.attached = void 0;
    this.rules = void 0;
    this.renderer = void 0;
    this.classes = void 0;
    this.keyframes = void 0;
    this.queue = void 0;
    this.attached = false;
    this.deployed = false;
    this.classes = {};
    this.keyframes = {};
    this.options = _extends({}, options, {
      sheet: this,
      parent: this,
      classes: this.classes,
      keyframes: this.keyframes
    });

    if (options.Renderer) {
      this.renderer = new options.Renderer(this);
    }

    this.rules = new RuleList(this.options);

    for (var name in styles) {
      this.rules.add(name, styles[name]);
    }

    this.rules.process();
  }
  /**
   * Attach renderable to the render tree.
   */


  var _proto = StyleSheet.prototype;

  _proto.attach = function attach() {
    if (this.attached) return this;
    if (this.renderer) this.renderer.attach();
    this.attached = true; // Order is important, because we can't use insertRule API if style element is not attached.

    if (!this.deployed) this.deploy();
    return this;
  }
  /**
   * Remove renderable from render tree.
   */
  ;

  _proto.detach = function detach() {
    if (!this.attached) return this;
    if (this.renderer) this.renderer.detach();
    this.attached = false;
    return this;
  }
  /**
   * Add a rule to the current stylesheet.
   * Will insert a rule also after the stylesheet has been rendered first time.
   */
  ;

  _proto.addRule = function addRule(name, decl, options) {
    var queue = this.queue; // Plugins can create rules.
    // In order to preserve the right order, we need to queue all `.addRule` calls,
    // which happen after the first `rules.add()` call.

    if (this.attached && !queue) this.queue = [];
    var rule = this.rules.add(name, decl, options);
    if (!rule) return null;
    this.options.jss.plugins.onProcessRule(rule);

    if (this.attached) {
      if (!this.deployed) return rule; // Don't insert rule directly if there is no stringified version yet.
      // It will be inserted all together when .attach is called.

      if (queue) queue.push(rule);else {
        this.insertRule(rule);

        if (this.queue) {
          this.queue.forEach(this.insertRule, this);
          this.queue = undefined;
        }
      }
      return rule;
    } // We can't add rules to a detached style node.
    // We will redeploy the sheet once user will attach it.


    this.deployed = false;
    return rule;
  }
  /**
   * Insert rule into the StyleSheet
   */
  ;

  _proto.insertRule = function insertRule(rule) {
    if (this.renderer) {
      this.renderer.insertRule(rule);
    }
  }
  /**
   * Create and add rules.
   * Will render also after Style Sheet was rendered the first time.
   */
  ;

  _proto.addRules = function addRules(styles, options) {
    var added = [];

    for (var name in styles) {
      var rule = this.addRule(name, styles[name], options);
      if (rule) added.push(rule);
    }

    return added;
  }
  /**
   * Get a rule by name.
   */
  ;

  _proto.getRule = function getRule(name) {
    return this.rules.get(name);
  }
  /**
   * Delete a rule by name.
   * Returns `true`: if rule has been deleted from the DOM.
   */
  ;

  _proto.deleteRule = function deleteRule(name) {
    var rule = this.rules.get(name);
    if (!rule) return false;
    this.rules.remove(rule);

    if (this.attached && rule.renderable && this.renderer) {
      return this.renderer.deleteRule(rule.renderable);
    }

    return true;
  }
  /**
   * Get index of a rule.
   */
  ;

  _proto.indexOf = function indexOf(rule) {
    return this.rules.indexOf(rule);
  }
  /**
   * Deploy pure CSS string to a renderable.
   */
  ;

  _proto.deploy = function deploy() {
    if (this.renderer) this.renderer.deploy();
    this.deployed = true;
    return this;
  }
  /**
   * Update the function values with a new data.
   */
  ;

  _proto.update = function update() {
    var _this$rules;

    (_this$rules = this.rules).update.apply(_this$rules, arguments);

    return this;
  }
  /**
   * Convert rules to a CSS string.
   */
  ;

  _proto.toString = function toString(options) {
    return this.rules.toString(options);
  };

  return StyleSheet;
}();

var PluginsRegistry =
/*#__PURE__*/
function () {
  function PluginsRegistry() {
    this.plugins = {
      internal: [],
      external: []
    };
    this.registry = void 0;
  }

  var _proto = PluginsRegistry.prototype;
  /**
   * Call `onCreateRule` hooks and return an object if returned by a hook.
   */

  _proto.onCreateRule = function onCreateRule(name, decl, options) {
    for (var i = 0; i < this.registry.onCreateRule.length; i++) {
      var rule = this.registry.onCreateRule[i](name, decl, options);
      if (rule) return rule;
    }

    return null;
  }
  /**
   * Call `onProcessRule` hooks.
   */
  ;

  _proto.onProcessRule = function onProcessRule(rule) {
    if (rule.isProcessed) return;
    var sheet = rule.options.sheet;

    for (var i = 0; i < this.registry.onProcessRule.length; i++) {
      this.registry.onProcessRule[i](rule, sheet);
    }

    if (rule.style) this.onProcessStyle(rule.style, rule, sheet);
    rule.isProcessed = true;
  }
  /**
   * Call `onProcessStyle` hooks.
   */
  ;

  _proto.onProcessStyle = function onProcessStyle(style, rule, sheet) {
    for (var i = 0; i < this.registry.onProcessStyle.length; i++) {
      // $FlowFixMe
      rule.style = this.registry.onProcessStyle[i](rule.style, rule, sheet);
    }
  }
  /**
   * Call `onProcessSheet` hooks.
   */
  ;

  _proto.onProcessSheet = function onProcessSheet(sheet) {
    for (var i = 0; i < this.registry.onProcessSheet.length; i++) {
      this.registry.onProcessSheet[i](sheet);
    }
  }
  /**
   * Call `onUpdate` hooks.
   */
  ;

  _proto.onUpdate = function onUpdate(data, rule, sheet, options) {
    for (var i = 0; i < this.registry.onUpdate.length; i++) {
      this.registry.onUpdate[i](data, rule, sheet, options);
    }
  }
  /**
   * Call `onChangeValue` hooks.
   */
  ;

  _proto.onChangeValue = function onChangeValue(value, prop, rule) {
    var processedValue = value;

    for (var i = 0; i < this.registry.onChangeValue.length; i++) {
      processedValue = this.registry.onChangeValue[i](processedValue, prop, rule);
    }

    return processedValue;
  }
  /**
   * Register a plugin.
   */
  ;

  _proto.use = function use(newPlugin, options) {
    if (options === void 0) {
      options = {
        queue: 'external'
      };
    }

    var plugins = this.plugins[options.queue]; // Avoids applying same plugin twice, at least based on ref.

    if (plugins.indexOf(newPlugin) !== -1) {
      return;
    }

    plugins.push(newPlugin);
    this.registry = [].concat(this.plugins.external, this.plugins.internal).reduce(function (registry, plugin) {
      for (var name in plugin) {
        if (name in registry) {
          registry[name].push(plugin[name]);
        } else {
          warning(false, "[JSS] Unknown hook \"" + name + "\".");
        }
      }

      return registry;
    }, {
      onCreateRule: [],
      onProcessRule: [],
      onProcessStyle: [],
      onProcessSheet: [],
      onChangeValue: [],
      onUpdate: []
    });
  };

  return PluginsRegistry;
}();
/**
 * Sheets registry to access them all at one place.
 */


var SheetsRegistry =
/*#__PURE__*/
function () {
  function SheetsRegistry() {
    this.registry = [];
  }

  var _proto = SheetsRegistry.prototype;
  /**
   * Register a Style Sheet.
   */

  _proto.add = function add(sheet) {
    var registry = this.registry;
    var index = sheet.options.index;
    if (registry.indexOf(sheet) !== -1) return;

    if (registry.length === 0 || index >= this.index) {
      registry.push(sheet);
      return;
    } // Find a position.


    for (var i = 0; i < registry.length; i++) {
      if (registry[i].options.index > index) {
        registry.splice(i, 0, sheet);
        return;
      }
    }
  }
  /**
   * Reset the registry.
   */
  ;

  _proto.reset = function reset() {
    this.registry = [];
  }
  /**
   * Remove a Style Sheet.
   */
  ;

  _proto.remove = function remove(sheet) {
    var index = this.registry.indexOf(sheet);
    this.registry.splice(index, 1);
  }
  /**
   * Convert all attached sheets to a CSS string.
   */
  ;

  _proto.toString = function toString(_temp) {
    var _ref = _temp === void 0 ? {} : _temp,
        attached = _ref.attached,
        options = _objectWithoutPropertiesLoose(_ref, ["attached"]);

    var css = '';

    for (var i = 0; i < this.registry.length; i++) {
      var sheet = this.registry[i];

      if (attached != null && sheet.attached !== attached) {
        continue;
      }

      if (css) css += '\n';
      css += sheet.toString(options);
    }

    return css;
  };

  _createClass(SheetsRegistry, [{
    key: "index",

    /**
     * Current highest index number.
     */
    get: function get() {
      return this.registry.length === 0 ? 0 : this.registry[this.registry.length - 1].options.index;
    }
  }]);

  return SheetsRegistry;
}();
/**
 * This is a global sheets registry. Only DomRenderer will add sheets to it.
 * On the server one should use an own SheetsRegistry instance and add the
 * sheets to it, because you need to make sure to create a new registry for
 * each request in order to not leak sheets across requests.
 */


var sheets = new SheetsRegistry();
/* eslint-disable */
// https://github.com/zloirock/core-js/issues/86#issuecomment-115759028

var globalThis = typeof window != 'undefined' && window.Math == Math ? window : typeof self != 'undefined' && self.Math == Math ? self : Function('return this')();
var ns = '2f1acc6c3a606b082e5eef5e54414ffb';
if (globalThis[ns] == null) globalThis[ns] = 0; // Bundle may contain multiple JSS versions at the same time. In order to identify
// the current version with just one short number and use it for classes generation
// we use a counter. Also it is more accurate, because user can manually reevaluate
// the module.

var moduleId = globalThis[ns]++;
var maxRules = 1e10;
/**
 * Returns a function which generates unique class names based on counters.
 * When new generator function is created, rule counter is reseted.
 * We need to reset the rule counter for SSR for each request.
 */

var createGenerateId = function createGenerateId(options) {
  if (options === void 0) {
    options = {};
  }

  var ruleCounter = 0;
  return function (rule, sheet) {
    ruleCounter += 1;

    if (ruleCounter > maxRules) {
      warning(false, "[JSS] You might have a memory leak. Rule counter is at " + ruleCounter + ".");
    }

    var jssId = '';
    var prefix = '';

    if (sheet) {
      if (sheet.options.classNamePrefix) {
        prefix = sheet.options.classNamePrefix;
      }

      if (sheet.options.jss.id != null) {
        jssId = String(sheet.options.jss.id);
      }
    }

    if (options.minify) {
      // Using "c" because a number can't be the first char in a class name.
      return "" + (prefix || 'c') + moduleId + jssId + ruleCounter;
    }

    return prefix + rule.key + "-" + moduleId + (jssId ? "-" + jssId : '') + "-" + ruleCounter;
  };
};
/**
 * Cache the value from the first time a function is called.
 */


var memoize = function memoize(fn) {
  var value;
  return function () {
    if (!value) value = fn();
    return value;
  };
};
/**
 * Get a style property value.
 */


function getPropertyValue(cssRule, prop) {
  try {
    // Support CSSTOM.
    if (cssRule.attributeStyleMap) {
      return cssRule.attributeStyleMap.get(prop);
    }

    return cssRule.style.getPropertyValue(prop);
  } catch (err) {
    // IE may throw if property is unknown.
    return '';
  }
}
/**
 * Set a style property.
 */


function setProperty(cssRule, prop, value) {
  try {
    var cssValue = value;

    if (Array.isArray(value)) {
      cssValue = toCssValue(value, true);

      if (value[value.length - 1] === '!important') {
        cssRule.style.setProperty(prop, cssValue, 'important');
        return true;
      }
    } // Support CSSTOM.


    if (cssRule.attributeStyleMap) {
      cssRule.attributeStyleMap.set(prop, cssValue);
    } else {
      cssRule.style.setProperty(prop, cssValue);
    }
  } catch (err) {
    // IE may throw if property is unknown.
    return false;
  }

  return true;
}
/**
 * Remove a style property.
 */


function removeProperty(cssRule, prop) {
  try {
    // Support CSSTOM.
    if (cssRule.attributeStyleMap) {
      cssRule.attributeStyleMap.delete(prop);
    } else {
      cssRule.style.removeProperty(prop);
    }
  } catch (err) {
    warning(false, "[JSS] DOMException \"" + err.message + "\" was thrown. Tried to remove property \"" + prop + "\".");
  }
}
/**
 * Set the selector.
 */


function setSelector(cssRule, selectorText) {
  cssRule.selectorText = selectorText; // Return false if setter was not successful.
  // Currently works in chrome only.

  return cssRule.selectorText === selectorText;
}
/**
 * Gets the `head` element upon the first call and caches it.
 * We assume it can't be null.
 */


var getHead = memoize(function () {
  return document.querySelector('head');
});
/**
 * Find attached sheet with an index higher than the passed one.
 */

function findHigherSheet(registry, options) {
  for (var i = 0; i < registry.length; i++) {
    var sheet = registry[i];

    if (sheet.attached && sheet.options.index > options.index && sheet.options.insertionPoint === options.insertionPoint) {
      return sheet;
    }
  }

  return null;
}
/**
 * Find attached sheet with the highest index.
 */


function findHighestSheet(registry, options) {
  for (var i = registry.length - 1; i >= 0; i--) {
    var sheet = registry[i];

    if (sheet.attached && sheet.options.insertionPoint === options.insertionPoint) {
      return sheet;
    }
  }

  return null;
}
/**
 * Find a comment with "jss" inside.
 */


function findCommentNode(text) {
  var head = getHead();

  for (var i = 0; i < head.childNodes.length; i++) {
    var node = head.childNodes[i];

    if (node.nodeType === 8 && node.nodeValue.trim() === text) {
      return node;
    }
  }

  return null;
}
/**
 * Find a node before which we can insert the sheet.
 */


function findPrevNode(options) {
  var registry = sheets.registry;

  if (registry.length > 0) {
    // Try to insert before the next higher sheet.
    var sheet = findHigherSheet(registry, options);

    if (sheet && sheet.renderer) {
      return {
        parent: sheet.renderer.element.parentNode,
        node: sheet.renderer.element
      };
    } // Otherwise insert after the last attached.


    sheet = findHighestSheet(registry, options);

    if (sheet && sheet.renderer) {
      return {
        parent: sheet.renderer.element.parentNode,
        node: sheet.renderer.element.nextSibling
      };
    }
  } // Try to find a comment placeholder if registry is empty.


  var insertionPoint = options.insertionPoint;

  if (insertionPoint && typeof insertionPoint === 'string') {
    var comment = findCommentNode(insertionPoint);

    if (comment) {
      return {
        parent: comment.parentNode,
        node: comment.nextSibling
      };
    } // If user specifies an insertion point and it can't be found in the document -
    // bad specificity issues may appear.


    warning(false, "[JSS] Insertion point \"" + insertionPoint + "\" not found.");
  }

  return false;
}
/**
 * Insert style element into the DOM.
 */


function insertStyle(style, options) {
  var insertionPoint = options.insertionPoint;
  var nextNode = findPrevNode(options);

  if (nextNode !== false && nextNode.parent) {
    nextNode.parent.insertBefore(style, nextNode.node);
    return;
  } // Works with iframes and any node types.


  if (insertionPoint && typeof insertionPoint.nodeType === 'number') {
    // https://stackoverflow.com/questions/41328728/force-casting-in-flow
    var insertionPointElement = insertionPoint;
    var parentNode = insertionPointElement.parentNode;
    if (parentNode) parentNode.insertBefore(style, insertionPointElement.nextSibling);else warning(false, '[JSS] Insertion point is not in the DOM.');
    return;
  }

  getHead().appendChild(style);
}
/**
 * Read jss nonce setting from the page if the user has set it.
 */


var getNonce = memoize(function () {
  var node = document.querySelector('meta[property="csp-nonce"]');
  return node ? node.getAttribute('content') : null;
});

var _insertRule = function insertRule(container, rule, index) {
  var maxIndex = container.cssRules.length; // In case previous insertion fails, passed index might be wrong

  if (index === undefined || index > maxIndex) {
    // eslint-disable-next-line no-param-reassign
    index = maxIndex;
  }

  try {
    if ('insertRule' in container) {
      var c = container;
      c.insertRule(rule, index);
    } // Keyframes rule.
    else if ('appendRule' in container) {
        var _c = container;

        _c.appendRule(rule);
      }
  } catch (err) {
    warning(false, "[JSS] " + err.message);
    return false;
  }

  return container.cssRules[index];
};

var createStyle = function createStyle() {
  var el = document.createElement('style'); // Without it, IE will have a broken source order specificity if we
  // insert rules after we insert the style tag.
  // It seems to kick-off the source order specificity algorithm.

  el.textContent = '\n';
  return el;
};

var DomRenderer =
/*#__PURE__*/
function () {
  // HTMLStyleElement needs fixing https://github.com/facebook/flow/issues/2696
  function DomRenderer(sheet) {
    this.getPropertyValue = getPropertyValue;
    this.setProperty = setProperty;
    this.removeProperty = removeProperty;
    this.setSelector = setSelector;
    this.element = void 0;
    this.sheet = void 0;
    this.hasInsertedRules = false; // There is no sheet when the renderer is used from a standalone StyleRule.

    if (sheet) sheets.add(sheet);
    this.sheet = sheet;

    var _ref = this.sheet ? this.sheet.options : {},
        media = _ref.media,
        meta = _ref.meta,
        element = _ref.element;

    this.element = element || createStyle();
    this.element.setAttribute('data-jss', '');
    if (media) this.element.setAttribute('media', media);
    if (meta) this.element.setAttribute('data-meta', meta);
    var nonce = getNonce();
    if (nonce) this.element.setAttribute('nonce', nonce);
  }
  /**
   * Insert style element into render tree.
   */


  var _proto = DomRenderer.prototype;

  _proto.attach = function attach() {
    // In the case the element node is external and it is already in the DOM.
    if (this.element.parentNode || !this.sheet) return;
    insertStyle(this.element, this.sheet.options); // When rules are inserted using `insertRule` API, after `sheet.detach().attach()`
    // most browsers create a new CSSStyleSheet, except of all IEs.

    var deployed = Boolean(this.sheet && this.sheet.deployed);

    if (this.hasInsertedRules && deployed) {
      this.hasInsertedRules = false;
      this.deploy();
    }
  }
  /**
   * Remove style element from render tree.
   */
  ;

  _proto.detach = function detach() {
    var parentNode = this.element.parentNode;
    if (parentNode) parentNode.removeChild(this.element);
  }
  /**
   * Inject CSS string into element.
   */
  ;

  _proto.deploy = function deploy() {
    var sheet = this.sheet;
    if (!sheet) return;

    if (sheet.options.link) {
      this.insertRules(sheet.rules);
      return;
    }

    this.element.textContent = "\n" + sheet.toString() + "\n";
  }
  /**
   * Insert RuleList into an element.
   */
  ;

  _proto.insertRules = function insertRules(rules, nativeParent) {
    for (var i = 0; i < rules.index.length; i++) {
      this.insertRule(rules.index[i], i, nativeParent);
    }
  }
  /**
   * Insert a rule into element.
   */
  ;

  _proto.insertRule = function insertRule(rule, index, nativeParent) {
    if (nativeParent === void 0) {
      nativeParent = this.element.sheet;
    }

    if (rule.rules) {
      var parent = rule;
      var latestNativeParent = nativeParent;

      if (rule.type === 'conditional' || rule.type === 'keyframes') {
        // We need to render the container without children first.
        latestNativeParent = _insertRule(nativeParent, parent.toString({
          children: false
        }), index);

        if (latestNativeParent === false) {
          return false;
        }
      }

      this.insertRules(parent.rules, latestNativeParent);
      return latestNativeParent;
    } // IE keeps the CSSStyleSheet after style node has been reattached,
    // so we need to check if the `renderable` reference the right style sheet and not
    // rerender those rules.


    if (rule.renderable && rule.renderable.parentStyleSheet === this.element.sheet) {
      return rule.renderable;
    }

    var ruleStr = rule.toString();
    if (!ruleStr) return false;

    var nativeRule = _insertRule(nativeParent, ruleStr, index);

    if (nativeRule === false) {
      return false;
    }

    this.hasInsertedRules = true;
    rule.renderable = nativeRule;
    return nativeRule;
  }
  /**
   * Delete a rule.
   */
  ;

  _proto.deleteRule = function deleteRule(cssRule) {
    var sheet = this.element.sheet;
    var index = this.indexOf(cssRule);
    if (index === -1) return false;
    sheet.deleteRule(index);
    return true;
  }
  /**
   * Get index of a CSS Rule.
   */
  ;

  _proto.indexOf = function indexOf(cssRule) {
    var cssRules = this.element.sheet.cssRules;

    for (var index = 0; index < cssRules.length; index++) {
      if (cssRule === cssRules[index]) return index;
    }

    return -1;
  }
  /**
   * Generate a new CSS rule and replace the existing one.
   *
   * Only used for some old browsers because they can't set a selector.
   */
  ;

  _proto.replaceRule = function replaceRule(cssRule, rule) {
    var index = this.indexOf(cssRule);
    if (index === -1) return false;
    this.element.sheet.deleteRule(index);
    return this.insertRule(rule, index);
  }
  /**
   * Get all rules elements.
   */
  ;

  _proto.getRules = function getRules() {
    return this.element.sheet.cssRules;
  };

  return DomRenderer;
}();

var instanceCounter = 0;

var Jss =
/*#__PURE__*/
function () {
  function Jss(options) {
    this.id = instanceCounter++;
    this.version = "10.0.0";
    this.plugins = new PluginsRegistry();
    this.options = {
      id: {
        minify: false
      },
      createGenerateId: createGenerateId,
      Renderer: isBrowser ? DomRenderer : null,
      plugins: []
    };
    this.generateId = createGenerateId({
      minify: false
    });

    for (var i = 0; i < plugins$1.length; i++) {
      this.plugins.use(plugins$1[i], {
        queue: 'internal'
      });
    }

    this.setup(options);
  }
  /**
   * Prepares various options, applies plugins.
   * Should not be used twice on the same instance, because there is no plugins
   * deduplication logic.
   */


  var _proto = Jss.prototype;

  _proto.setup = function setup(options) {
    if (options === void 0) {
      options = {};
    }

    if (options.createGenerateId) {
      this.options.createGenerateId = options.createGenerateId;
    }

    if (options.id) {
      this.options.id = _extends({}, this.options.id, options.id);
    }

    if (options.createGenerateId || options.id) {
      this.generateId = this.options.createGenerateId(this.options.id);
    }

    if (options.insertionPoint != null) this.options.insertionPoint = options.insertionPoint;

    if ('Renderer' in options) {
      this.options.Renderer = options.Renderer;
    } // eslint-disable-next-line prefer-spread


    if (options.plugins) this.use.apply(this, options.plugins);
    return this;
  }
  /**
   * Create a Style Sheet.
   */
  ;

  _proto.createStyleSheet = function createStyleSheet(styles, options) {
    if (options === void 0) {
      options = {};
    }

    var _options = options,
        index = _options.index;

    if (typeof index !== 'number') {
      index = sheets.index === 0 ? 0 : sheets.index + 1;
    }

    var sheet = new StyleSheet(styles, _extends({}, options, {
      jss: this,
      generateId: options.generateId || this.generateId,
      insertionPoint: this.options.insertionPoint,
      Renderer: this.options.Renderer,
      index: index
    }));
    this.plugins.onProcessSheet(sheet);
    return sheet;
  }
  /**
   * Detach the Style Sheet and remove it from the registry.
   */
  ;

  _proto.removeStyleSheet = function removeStyleSheet(sheet) {
    sheet.detach();
    sheets.remove(sheet);
    return this;
  }
  /**
   * Create a rule without a Style Sheet.
   */
  ;

  _proto.createRule = function createRule$$1(name, style, options) {
    if (style === void 0) {
      style = {};
    }

    if (options === void 0) {
      options = {};
    } // Enable rule without name for inline styles.


    if (typeof name === 'object') {
      return this.createRule(undefined, name, style);
    }

    var ruleOptions = _extends({}, options, {
      jss: this,
      Renderer: this.options.Renderer
    });

    if (!ruleOptions.generateId) ruleOptions.generateId = this.generateId;
    if (!ruleOptions.classes) ruleOptions.classes = {};
    if (!ruleOptions.keyframes) ruleOptions.keyframes = {};
    var rule = createRule(name, style, ruleOptions);
    if (rule) this.plugins.onProcessRule(rule);
    return rule;
  }
  /**
   * Register plugin. Passed function will be invoked with a rule instance.
   */
  ;

  _proto.use = function use() {
    var _this = this;

    for (var _len = arguments.length, plugins$$1 = new Array(_len), _key = 0; _key < _len; _key++) {
      plugins$$1[_key] = arguments[_key];
    }

    plugins$$1.forEach(function (plugin) {
      _this.plugins.use(plugin);
    });
    return this;
  };

  return Jss;
}();
/**
 * SheetsManager is like a WeakMap which is designed to count StyleSheet
 * instances and attach/detach automatically.
 */


var SheetsManager =
/*#__PURE__*/
function () {
  function SheetsManager() {
    this.length = 0;
    this.sheets = new WeakMap();
  }

  var _proto = SheetsManager.prototype;

  _proto.get = function get(key) {
    var entry = this.sheets.get(key);
    return entry && entry.sheet;
  };

  _proto.add = function add(key, sheet) {
    if (this.sheets.has(key)) return;
    this.length++;
    this.sheets.set(key, {
      sheet: sheet,
      refs: 0
    });
  };

  _proto.manage = function manage(key) {
    var entry = this.sheets.get(key);

    if (entry) {
      if (entry.refs === 0) {
        entry.sheet.attach();
      }

      entry.refs++;
      return entry.sheet;
    }

    warning(false, "[JSS] SheetsManager: can't find sheet to manage");
    return undefined;
  };

  _proto.unmanage = function unmanage(key) {
    var entry = this.sheets.get(key);

    if (entry) {
      if (entry.refs > 0) {
        entry.refs--;
        if (entry.refs === 0) entry.sheet.detach();
      }
    } else {
      warning(false, "SheetsManager: can't find sheet to unmanage");
    }
  };

  _createClass(SheetsManager, [{
    key: "size",
    get: function get() {
      return this.length;
    }
  }]);

  return SheetsManager;
}();
/**
 * Creates a new instance of Jss.
 */

var create = function create(options) {
  return new Jss(options);
};
/**
 * A global Jss instance.
 */


var index = create();

/**
 * Add vendor prefix to a property name when needed.
 *
 * @api public
 */

function jssVendorPrefixer() {
  function onProcessRule(rule) {
    if (rule.type === 'keyframes') {
      var atRule = rule;
      atRule.at = supportedKeyframes(atRule.at);
    }
  }

  function prefixStyle(style) {
    for (var prop in style) {
      var value = style[prop];

      if (prop === 'fallbacks' && Array.isArray(value)) {
        style[prop] = value.map(prefixStyle);
        continue;
      }

      var changeProp = false;
      var supportedProp = supportedProperty(prop);
      if (supportedProp && supportedProp !== prop) changeProp = true;
      var changeValue = false;
      var supportedValue$$1 = supportedValue(supportedProp, toCssValue(value));
      if (supportedValue$$1 && supportedValue$$1 !== value) changeValue = true;

      if (changeProp || changeValue) {
        if (changeProp) delete style[prop];
        style[supportedProp || prop] = supportedValue$$1 || value;
      }
    }

    return style;
  }

  function onProcessStyle(style, rule) {
    if (rule.type !== 'style') return style;
    return prefixStyle(style);
  }

  function onChangeValue(value, prop) {
    return supportedValue(prop, toCssValue(value)) || value;
  }

  return {
    onProcessRule: onProcessRule,
    onProcessStyle: onProcessStyle,
    onChangeValue: onChangeValue
  };
}

export default jssVendorPrefixer;
