{"version":3,"sources":["../../../../../../src/build/webpack/loaders/next-style-loader/runtime/injectStylesIntoStyleTag.ts"],"sourcesContent":["/// <reference types=\"webpack/module.d.ts\" />\n\nconst isOldIE = (function isOldIE() {\n  let memo: any\n\n  return function memorize() {\n    if (typeof memo === 'undefined') {\n      // Test for IE <= 9 as proposed by Browserhacks\n      // @see http://browserhacks.com/#hack-e71d8692f65334173fee715c222cb805\n      // Tests for existence of standard globals is to allow style-loader\n      // to operate correctly into non-standard environments\n      // @see https://github.com/webpack-contrib/style-loader/issues/177\n      memo = Boolean(window && document && document.all && !window.atob)\n    }\n\n    return memo\n  }\n})()\n\nconst getTargetElement = (function () {\n  const memo: any = {}\n\n  return function memorize(target: any) {\n    if (typeof memo[target] === 'undefined') {\n      let styleTarget: any = document.querySelector(target)\n\n      // Special case to return head of iframe instead of iframe itself\n      if (\n        window.HTMLIFrameElement &&\n        styleTarget instanceof window.HTMLIFrameElement\n      ) {\n        try {\n          // This will throw an exception if access to iframe is blocked\n          // due to cross-origin restrictions\n          styleTarget = (styleTarget as any).contentDocument.head\n        } catch (e) {\n          // istanbul ignore next\n          styleTarget = null\n        }\n      }\n\n      memo[target] = styleTarget\n    }\n\n    return memo[target]\n  }\n})()\n\nconst stylesInDom: any = []\n\nfunction getIndexByIdentifier(identifier: any) {\n  let result = -1\n\n  for (let i = 0; i < stylesInDom.length; i++) {\n    if (stylesInDom[i].identifier === identifier) {\n      result = i\n      break\n    }\n  }\n\n  return result\n}\n\nfunction modulesToDom(list: any, options: any) {\n  const idCountMap: any = {}\n  const identifiers = []\n\n  for (let i = 0; i < list.length; i++) {\n    const item = list[i]\n    const id = options.base ? item[0] + options.base : item[0]\n    const count = idCountMap[id] || 0\n    const identifier = id + ' ' + count.toString()\n\n    idCountMap[id] = count + 1\n\n    const index = getIndexByIdentifier(identifier)\n    const obj = {\n      css: item[1],\n      media: item[2],\n      sourceMap: item[3],\n    }\n\n    if (index !== -1) {\n      stylesInDom[index].references++\n      stylesInDom[index].updater(obj)\n    } else {\n      stylesInDom.push({\n        identifier: identifier,\n        updater: addStyle(obj, options),\n        references: 1,\n      })\n    }\n\n    identifiers.push(identifier)\n  }\n\n  return identifiers\n}\n\nfunction insertStyleElement(options: any) {\n  const style = document.createElement('style')\n  const attributes = options.attributes || {}\n\n  if (typeof attributes.nonce === 'undefined') {\n    const nonce =\n      typeof __webpack_nonce__ !== 'undefined' ? __webpack_nonce__ : null\n\n    if (nonce) {\n      attributes.nonce = nonce\n    }\n  }\n\n  Object.keys(attributes).forEach(function (key) {\n    style.setAttribute(key, attributes[key])\n  })\n\n  if (typeof options.insert === 'function') {\n    options.insert(style)\n  } else {\n    const target = getTargetElement(options.insert || 'head')\n\n    if (!target) {\n      throw new Error(\n        \"Couldn't find a style target. 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