{
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  "sources": ["site.ts"],
  "sourcesContent": ["/*!\n * @license\n * Copyright 2019-2020 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n/**\n * site.ts contains a set of functions that should be invoked for\n * all page views before other scripts are added to the page.\n */\n\n/**\n * A bit of navigation related code for handling dismissible elements.\n */\n(function registerHeaderListeners() {\n  'use strict';\n\n  const header = document.querySelector('.js-header');\n  const menuButtons = document.querySelectorAll('.js-headerMenuButton');\n  menuButtons.forEach(button => {\n    button.addEventListener('click', e => {\n      e.preventDefault();\n      header?.classList.toggle('is-active');\n      button.setAttribute('aria-expanded', `${header?.classList.contains('is-active') ?? false}`);\n    });\n  });\n\n  const scrim = document.querySelector('.js-scrim');\n  // eslint-disable-next-line no-prototype-builtins\n  if (scrim && scrim.hasOwnProperty('addEventListener')) {\n    scrim.addEventListener('click', e => {\n      e.preventDefault();\n      header?.classList.remove('is-active');\n      menuButtons.forEach(button => {\n        button.setAttribute('aria-expanded', `${header?.classList.contains('is-active') ?? false}`);\n      });\n    });\n  }\n})();\n\ninterface TagManagerEvent {\n  event: string;\n  'gtm.start': number;\n}\n\n// eslint-disable-next-line @typescript-eslint/no-unused-vars\ninterface Window {\n  dataLayer?: (TagManagerEvent | VoidFunction)[];\n}\n\n/**\n * setupGoogleTagManager intializes Google Tag Manager.\n */\n(function setupGoogleTagManager() {\n  window.dataLayer = window.dataLayer || [];\n  window.dataLayer.push({\n    'gtm.start': new Date().getTime(),\n    event: 'gtm.js',\n  });\n})();\n\n/**\n * removeUTMSource removes the utm_source GET parameter if present.\n * This is done using JavaScript, so that the utm_source is still\n * captured by Google Analytics.\n */\nfunction removeUTMSource() {\n  const urlParams = new URLSearchParams(window.location.search);\n  const utmSource = urlParams.get('utm_source');\n  if (utmSource !== 'gopls' && utmSource !== 'godoc') {\n    return;\n  }\n\n  /** Strip the utm_source query parameter and replace the URL. **/\n  const newURL = new URL(window.location.href);\n  urlParams.delete('utm_source');\n  newURL.search = urlParams.toString();\n  window.history.replaceState(null, '', newURL.toString());\n}\n\nif (document.querySelector<HTMLElement>('.js-gtmID')?.dataset.gtmid && window.dataLayer) {\n  window.dataLayer.push(function () {\n    removeUTMSource();\n  });\n} else {\n  removeUTMSource();\n}\n"],
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