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Edit File: emotion-sheet.cjs.js

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var isDevelopment = false;

Based off glamor's StyleSheet, thanks Sunil ❤️

high performance StyleSheet for css-in-js systems

- uses multiple style tags behind the scenes for millions of rules
- uses `insertRule` for appending in production for *much* faster performance

// usage

import { StyleSheet } from '@emotion/sheet'

let styleSheet = new StyleSheet({ key: '', container: document.head })

styleSheet.insert('#box { border: 1px solid red; }')
- appends a css rule into the stylesheet

styleSheet.flush()
- empties the stylesheet of all its contents

function sheetForTag(tag) {
  if (tag.sheet) {
    return tag.sheet;
  } // this weirdness brought to you by firefox

/* istanbul ignore next */

for (var i = 0; i < document.styleSheets.length; i++) {
    if (document.styleSheets[i].ownerNode === tag) {
      return document.styleSheets[i];
    }
  } // this function should always return with a value
  // TS can't understand it though so we make it stop complaining here

return undefined;
}

function createStyleElement(options) {
  var tag = document.createElement('style');
  tag.setAttribute('data-emotion', options.key);

if (options.nonce !== undefined) {
    tag.setAttribute('nonce', options.nonce);
  }

tag.appendChild(document.createTextNode(''));
  tag.setAttribute('data-s', '');
  return tag;
}

var StyleSheet = /*#__PURE__*/function () {
  // Using Node instead of HTMLElement since container may be a ShadowRoot
  function StyleSheet(options) {
    var _this = this;

this._insertTag = function (tag) {
      var before;

if (_this.tags.length === 0) {
        if (_this.insertionPoint) {
          before = _this.insertionPoint.nextSibling;
        } else if (_this.prepend) {
          before = _this.container.firstChild;
        } else {
          before = _this.before;
        }
      } else {
        before = _this.tags[_this.tags.length - 1].nextSibling;
      }

_this.container.insertBefore(tag, before);

_this.tags.push(tag);
    };

this.isSpeedy = options.speedy === undefined ? !isDevelopment : options.speedy;
    this.tags = [];
    this.ctr = 0;
    this.nonce = options.nonce; // key is the value of the data-emotion attribute, it's used to identify different sheets

this.key = options.key;
    this.container = options.container;
    this.prepend = options.prepend;
    this.insertionPoint = options.insertionPoint;
    this.before = null;
  }

var _proto = StyleSheet.prototype;

_proto.hydrate = function hydrate(nodes) {
    nodes.forEach(this._insertTag);
  };

_proto.insert = function insert(rule) {
    // the max length is how many rules we have per style tag, it's 65000 in speedy mode
    // it's 1 in dev because we insert source maps that map a single rule to a location
    // and you can only have one source map per style tag
    if (this.ctr % (this.isSpeedy ? 65000 : 1) === 0) {
      this._insertTag(createStyleElement(this));
    }

var tag = this.tags[this.tags.length - 1];

if (this.isSpeedy) {
      var sheet = sheetForTag(tag);

try {
        // this is the ultrafast version, works across browsers
        // the big drawback is that the css won't be editable in devtools
        sheet.insertRule(rule, sheet.cssRules.length);
      } catch (e) {
      }
    } else {
      tag.appendChild(document.createTextNode(rule));
    }

this.ctr++;
  };

_proto.flush = function flush() {
    this.tags.forEach(function (tag) {
      var _tag$parentNode;

return (_tag$parentNode = tag.parentNode) == null ? void 0 : _tag$parentNode.removeChild(tag);
    });
    this.tags = [];
    this.ctr = 0;
  };

return StyleSheet;
}();

exports.StyleSheet = StyleSheet;