text: const html = baseEndpoint => `
  <!DOCTYPE html>
  <html>
    <head>
      <meta charset=utf-8 />
      <meta name="viewport" content="user-scalable=no, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, minimal-ui">
      <title>GraphQL Playground</title>
      <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/graphql-playground-react/build/static/css/index.css" />
      <link rel="shortcut icon" href="//cdn.jsdelivr.net/npm/graphql-playground-react/build/favicon.png" />
      <script src="//cdn.jsdelivr.net/npm/graphql-playground-react/build/static/js/middleware.js"></script>
    </head>
  
    <body>
      <style type="text/css">
        html {
          font-family: "Open Sans", sans-serif;
          overflow: hidden;
        }
        body {
          margin: 0;
          background: #172a3a;
        }
        .playgroundIn {
          -webkit-animation: playgroundIn 0.5s ease-out forwards;
          animation: playgroundIn 0.5s ease-out forwards;
        }
        @-webkit-keyframes playgroundIn {
          from {
            opacity: 0;
            -webkit-transform: translateY(10px);
            -ms-transform: translateY(10px);
            transform: translateY(10px);
          }
          to {
            opacity: 1;
            -webkit-transform: translateY(0);
            -ms-transform: translateY(0);
            transform: translateY(0);
          }
        }
        @keyframes playgroundIn {
          from {
            opacity: 0;
            -webkit-transform: translateY(10px);
            -ms-transform: translateY(10px);
            transform: translateY(10px);
          }
          to {
            opacity: 1;
            -webkit-transform: translateY(0);
            -ms-transform: translateY(0);
            transform: translateY(0);
          }
        }
      </style>
  
      <style type="text/css">
        .fadeOut {
          -webkit-animation: fadeOut 0.5s ease-out forwards;
          animation: fadeOut 0.5s ease-out forwards;
        }
        @-webkit-keyframes fadeIn {
          from {
            opacity: 0;
            -webkit-transform: translateY(-10px);
            -ms-transform: translateY(-10px);
            transform: translateY(-10px);
          }
          to {
            opacity: 1;
            -webkit-transform: translateY(0);
            -ms-transform: translateY(0);
            transform: translateY(0);
          }
        }
        @keyframes fadeIn {
          from {
            opacity: 0;
            -webkit-transform: translateY(-10px);
            -ms-transform: translateY(-10px);
            transform: translateY(-10px);
          }
          to {
            opacity: 1;
            -webkit-transform: translateY(0);
            -ms-transform: translateY(0);
            transform: translateY(0);
          }
        }
        @-webkit-keyframes fadeOut {
          from {
            opacity: 1;
            -webkit-transform: translateY(0);
            -ms-transform: translateY(0);
            transform: translateY(0);
          }
          to {
            opacity: 0;
            -webkit-transform: translateY(-10px);
            -ms-transform: translateY(-10px);
            transform: translateY(-10px);
          }
        }
        @keyframes fadeOut {
          from {
            opacity: 1;
            -webkit-transform: translateY(0);
            -ms-transform: translateY(0);
            transform: translateY(0);
          }
          to {
            opacity: 0;
            -webkit-transform: translateY(-10px);
            -ms-transform: translateY(-10px);
            transform: translateY(-10px);
          }
        }
        @-webkit-keyframes appearIn {
          from {
            opacity: 0;
            -webkit-transform: translateY(0px);
            -ms-transform: translateY(0px);
            transform: translateY(0px);
          }
          to {
            opacity: 1;
            -webkit-transform: translateY(0);
            -ms-transform: translateY(0);
            transform: translateY(0);
          }
        }
        @keyframes appearIn {
          from {
            opacity: 0;
            -webkit-transform: translateY(0px);
            -ms-transform: translateY(0px);
            transform: translateY(0px);
          }
          to {
            opacity: 1;
            -webkit-transform: translateY(0);
            -ms-transform: translateY(0);
            transform: translateY(0);
          }
        }
        @-webkit-keyframes scaleIn {
          from {
            -webkit-transform: scale(0);
            -ms-transform: scale(0);
            transform: scale(0);
          }
          to {
            -webkit-transform: scale(1);
            -ms-transform: scale(1);
            transform: scale(1);
          }
        }
        @keyframes scaleIn {
          from {
            -webkit-transform: scale(0);
            -ms-transform: scale(0);
            transform: scale(0);
          }
          to {
            -webkit-transform: scale(1);
            -ms-transform: scale(1);
            transform: scale(1);
          }
        }
        @-webkit-keyframes innerDrawIn {
          0% {
            stroke-dashoffset: 70;
          }
          50% {
            stroke-dashoffset: 140;
          }
          100% {
            stroke-dashoffset: 210;
          }
        }
        @keyframes innerDrawIn {
          0% {
            stroke-dashoffset: 70;
          }
          50% {
            stroke-dashoffset: 140;
          }
          100% {
            stroke-dashoffset: 210;
          }
        }
        @-webkit-keyframes outerDrawIn {
          0% {
            stroke-dashoffset: 76;
          }
          100% {
            stroke-dashoffset: 152;
          }
        }
        @keyframes outerDrawIn {
          0% {
            stroke-dashoffset: 76;
          }
          100% {
            stroke-dashoffset: 152;
          }
        }
        .hHWjkv {
          -webkit-transform-origin: 0px 0px;
          -ms-transform-origin: 0px 0px;
          transform-origin: 0px 0px;
          -webkit-transform: scale(0);
          -ms-transform: scale(0);
          transform: scale(0);
          -webkit-animation: scaleIn 0.25s linear forwards 0.2222222222222222s;
          animation: scaleIn 0.25s linear forwards 0.2222222222222222s;
        }
        .gCDOzd {
          -webkit-transform-origin: 0px 0px;
          -ms-transform-origin: 0px 0px;
          transform-origin: 0px 0px;
          -webkit-transform: scale(0);
          -ms-transform: scale(0);
          transform: scale(0);
          -webkit-animation: scaleIn 0.25s linear forwards 0.4222222222222222s;
          animation: scaleIn 0.25s linear forwards 0.4222222222222222s;
        }
        .hmCcxi {
          -webkit-transform-origin: 0px 0px;
          -ms-transform-origin: 0px 0px;
          transform-origin: 0px 0px;
          -webkit-transform: scale(0);
          -ms-transform: scale(0);
          transform: scale(0);
          -webkit-animation: scaleIn 0.25s linear forwards 0.6222222222222222s;
          animation: scaleIn 0.25s linear forwards 0.6222222222222222s;
        }
        .eHamQi {
          -webkit-transform-origin: 0px 0px;
          -ms-transform-origin: 0px 0px;
          transform-origin: 0px 0px;
          -webkit-transform: scale(0);
          -ms-transform: scale(0);
          transform: scale(0);
          -webkit-animation: scaleIn 0.25s linear forwards 0.8222222222222223s;
          animation: scaleIn 0.25s linear forwards 0.8222222222222223s;
        }
        .byhgGu {
          -webkit-transform-origin: 0px 0px;
          -ms-transform-origin: 0px 0px;
          transform-origin: 0px 0px;
          -webkit-transform: scale(0);
          -ms-transform: scale(0);
          transform: scale(0);
          -webkit-animation: scaleIn 0.25s linear forwards 1.0222222222222221s;
          animation: scaleIn 0.25s linear forwards 1.0222222222222221s;
        }
        .llAKP {
          -webkit-transform-origin: 0px 0px;
          -ms-transform-origin: 0px 0px;
          transform-origin: 0px 0px;
          -webkit-transform: scale(0);
          -ms-transform: scale(0);
          transform: scale(0);
          -webkit-animation: scaleIn 0.25s linear forwards 1.2222222222222223s;
          animation: scaleIn 0.25s linear forwards 1.2222222222222223s;
        }
        .bglIGM {
          -webkit-transform-origin: 64px 28px;
          -ms-transform-origin: 64px 28px;
          transform-origin: 64px 28px;
          -webkit-transform: scale(0);
          -ms-transform: scale(0);
          transform: scale(0);
          -webkit-animation: scaleIn 0.25s linear forwards 0.2222222222222222s;
          animation: scaleIn 0.25s linear forwards 0.2222222222222222s;
        }
        .ksxRII {
          -webkit-transform-origin: 95.98500061035156px 46.510000228881836px;
          -ms-transform-origin: 95.98500061035156px 46.510000228881836px;
          transform-origin: 95.98500061035156px 46.510000228881836px;
          -webkit-transform: scale(0);
          -ms-transform: scale(0);
          transform: scale(0);
          -webkit-animation: scaleIn 0.25s linear forwards 0.4222222222222222s;
          animation: scaleIn 0.25s linear forwards 0.4222222222222222s;
        }
        .cWrBmb {
          -webkit-transform-origin: 95.97162628173828px 83.4900016784668px;
          -ms-transform-origin: 95.97162628173828px 83.4900016784668px;
          transform-origin: 95.97162628173828px 83.4900016784668px;
          -webkit-transform: scale(0);
          -ms-transform: scale(0);
          transform: scale(0);
          -webkit-animation: scaleIn 0.25s linear forwards 0.6222222222222222s;
          animation: scaleIn 0.25s linear forwards 0.6222222222222222s;
        }
        .Wnusb {
          -webkit-transform-origin: 64px 101.97999572753906px;
          -ms-transform-origin: 64px 101.97999572753906px;
          transform-origin: 64px 101.97999572753906px;
          -webkit-transform: scale(0);
          -ms-transform: scale(0);
          transform: scale(0);
          -webkit-animation: scaleIn 0.25s linear forwards 0.8222222222222223s;
          animation: scaleIn 0.25s linear forwards 0.8222222222222223s;
        }
        .bfPqf {
          -webkit-transform-origin: 32.03982162475586px 83.4900016784668px;
          -ms-transform-origin: 32.03982162475586px 83.4900016784668px;
          transform-origin: 32.03982162475586px 83.4900016784668px;
          -webkit-transform: scale(0);
          -ms-transform: scale(0);
          transform: scale(0);
          -webkit-animation: scaleIn 0.25s linear forwards 1.0222222222222221s;
          animation: scaleIn 0.25s linear forwards 1.0222222222222221s;
        }
        .edRCTN {
          -webkit-transform-origin: 32.033552169799805px 46.510000228881836px;
          -ms-transform-origin: 32.033552169799805px 46.510000228881836px;
          transform-origin: 32.033552169799805px 46.510000228881836px;
          -webkit-transform: scale(0);
          -ms-transform: scale(0);
          transform: scale(0);
          -webkit-animation: scaleIn 0.25s linear forwards 1.2222222222222223s;
          animation: scaleIn 0.25s linear forwards 1.2222222222222223s;
        }
        .iEGVWn {
          opacity: 0;
          stroke-dasharray: 76;
          -webkit-animation: outerDrawIn 0.5s ease-out forwards 0.3333333333333333s, appearIn 0.1s ease-out forwards 0.3333333333333333s;
          animation: outerDrawIn 0.5s ease-out forwards 0.3333333333333333s, appearIn 0.1s ease-out forwards 0.3333333333333333s;
          -webkit-animation-iteration-count: 1, 1;
          animation-iteration-count: 1, 1;
        }
        .bsocdx {
          opacity: 0;
          stroke-dasharray: 76;
          -webkit-animation: outerDrawIn 0.5s ease-out forwards 0.5333333333333333s, appearIn 0.1s ease-out forwards 0.5333333333333333s;
          animation: outerDrawIn 0.5s ease-out forwards 0.5333333333333333s, appearIn 0.1s ease-out forwards 0.5333333333333333s;
          -webkit-animation-iteration-count: 1, 1;
          animation-iteration-count: 1, 1;
        }
        .jAZXmP {
          opacity: 0;
          stroke-dasharray: 76;
          -webkit-animation: outerDrawIn 0.5s ease-out forwards 0.7333333333333334s, appearIn 0.1s ease-out forwards 0.7333333333333334s;
          animation: outerDrawIn 0.5s ease-out forwards 0.7333333333333334s, appearIn 0.1s ease-out forwards 0.7333333333333334s;
          -webkit-animation-iteration-count: 1, 1;
          animation-iteration-count: 1, 1;
        }
        .hSeArx {
          opacity: 0;
          stroke-dasharray: 76;
          -webkit-animation: outerDrawIn 0.5s ease-out forwards 0.9333333333333333s, appearIn 0.1s ease-out forwards 0.9333333333333333s;
          animation: outerDrawIn 0.5s ease-out forwards 0.9333333333333333s, appearIn 0.1s ease-out forwards 0.9333333333333333s;
          -webkit-animation-iteration-count: 1, 1;
          animation-iteration-count: 1, 1;
        }
        .bVgqGk {
          opacity: 0;
          stroke-dasharray: 76;
          -webkit-animation: outerDrawIn 0.5s ease-out forwards 1.1333333333333333s, appearIn 0.1s ease-out forwards 1.1333333333333333s;
          animation: outerDrawIn 0.5s ease-out forwards 1.1333333333333333s, appearIn 0.1s ease-out forwards 1.1333333333333333s;
          -webkit-animation-iteration-count: 1, 1;
          animation-iteration-count: 1, 1;
        }
        .hEFqBt {
          opacity: 0;
          stroke-dasharray: 76;
          -webkit-animation: outerDrawIn 0.5s ease-out forwards 1.3333333333333333s, appearIn 0.1s ease-out forwards 1.3333333333333333s;
          animation: outerDrawIn 0.5s ease-out forwards 1.3333333333333333s, appearIn 0.1s ease-out forwards 1.3333333333333333s;
          -webkit-animation-iteration-count: 1, 1;
          animation-iteration-count: 1, 1;
        }
        .dzEKCM {
          opacity: 0;
          stroke-dasharray: 70;
          -webkit-animation: innerDrawIn 1s ease-in-out forwards 1.3666666666666667s, appearIn 0.1s linear forwards 1.3666666666666667s;
          animation: innerDrawIn 1s ease-in-out forwards 1.3666666666666667s, appearIn 0.1s linear forwards 1.3666666666666667s;
          -webkit-animation-iteration-count: infinite, 1;
          animation-iteration-count: infinite, 1;
        }
        .DYnPx {
          opacity: 0;
          stroke-dasharray: 70;
          -webkit-animation: innerDrawIn 1s ease-in-out forwards 1.5333333333333332s, appearIn 0.1s linear forwards 1.5333333333333332s;
          animation: innerDrawIn 1s ease-in-out forwards 1.5333333333333332s, appearIn 0.1s linear forwards 1.5333333333333332s;
          -webkit-animation-iteration-count: infinite, 1;
          animation-iteration-count: infinite, 1;
        }
        .hjPEAQ {
          opacity: 0;
          stroke-dasharray: 70;
          -webkit-animation: innerDrawIn 1s ease-in-out forwards 1.7000000000000002s, appearIn 0.1s linear forwards 1.7000000000000002s;
          animation: innerDrawIn 1s ease-in-out forwards 1.7000000000000002s, appearIn 0.1s linear forwards 1.7000000000000002s;
          -webkit-animation-iteration-count: infinite, 1;
          animation-iteration-count: infinite, 1;
        }
        #loading-wrapper {
          position: absolute;
          width: 100vw;
          height: 100vh;
          display: -webkit-box;
          display: -webkit-flex;
          display: -ms-flexbox;
          display: flex;
          -webkit-align-items: center;
          -webkit-box-align: center;
          -ms-flex-align: center;
          align-items: center;
          -webkit-box-pack: center;
          -webkit-justify-content: center;
          -ms-flex-pack: center;
          justify-content: center;
          -webkit-flex-direction: column;
          -ms-flex-direction: column;
          flex-direction: column;
        }
        .logo {
          width: 75px;
          height: 75px;
          margin-bottom: 20px;
          opacity: 0;
          -webkit-animation: fadeIn 0.5s ease-out forwards;
          animation: fadeIn 0.5s ease-out forwards;
        }
        .text {
          font-size: 32px;
          font-weight: 200;
          text-align: center;
          color: rgba(255, 255, 255, 0.6);
          opacity: 0;
          -webkit-animation: fadeIn 0.5s ease-out forwards;
          animation: fadeIn 0.5s ease-out forwards;
        }
        .dGfHfc {
          font-weight: 400;
        }
      </style>
      <div id="loading-wrapper">
        <svg class="logo" viewBox="0 0 128 128" xmlns:xlink="http://www.w3.org/1999/xlink">
          <title>GraphQL Playground Logo</title>
          <defs>
            <linearGradient id="linearGradient-1" x1="4.86%" x2="96.21%" y1="0%" y2="99.66%">
              <stop stop-color="#E00082" stop-opacity=".8" offset="0%"></stop>
              <stop stop-color="#E00082" offset="100%"></stop>
            </linearGradient>
          </defs>
          <g>
            <rect id="Gradient" width="127.96" height="127.96" y="1" fill="url(#linearGradient-1)" rx="4"></rect>
            <path id="Border" fill="#E00082" fill-rule="nonzero" d="M4.7 2.84c-1.58 0-2.86 1.28-2.86 2.85v116.57c0 1.57 1.28 2.84 2.85 2.84h116.57c1.57 0 2.84-1.26 2.84-2.83V5.67c0-1.55-1.26-2.83-2.83-2.83H4.67zM4.7 0h116.58c3.14 0 5.68 2.55 5.68 5.7v116.58c0 3.14-2.54 5.68-5.68 5.68H4.68c-3.13 0-5.68-2.54-5.68-5.68V5.68C-1 2.56 1.55 0 4.7 0z"></path>
            <path class="bglIGM" x="64" y="28" fill="#fff" d="M64 36c-4.42 0-8-3.58-8-8s3.58-8 8-8 8 3.58 8 8-3.58 8-8 8" style="transform: translate(100px, 100px);"></path>
            <path class="ksxRII" x="95.98500061035156" y="46.510000228881836" fill="#fff" d="M89.04 50.52c-2.2-3.84-.9-8.73 2.94-10.96 3.83-2.2 8.72-.9 10.95 2.94 2.2 3.84.9 8.73-2.94 10.96-3.85 2.2-8.76.9-10.97-2.94"
              style="transform: translate(100px, 100px);"></path>
            <path class="cWrBmb" x="95.97162628173828" y="83.4900016784668" fill="#fff" d="M102.9 87.5c-2.2 3.84-7.1 5.15-10.94 2.94-3.84-2.2-5.14-7.12-2.94-10.96 2.2-3.84 7.12-5.15 10.95-2.94 3.86 2.23 5.16 7.12 2.94 10.96"
              style="transform: translate(100px, 100px);"></path>
            <path class="Wnusb" x="64" y="101.97999572753906" fill="#fff" d="M64 110c-4.43 0-8-3.6-8-8.02 0-4.44 3.57-8.02 8-8.02s8 3.58 8 8.02c0 4.4-3.57 8.02-8 8.02"
              style="transform: translate(100px, 100px);"></path>
            <path class="bfPqf" x="32.03982162475586" y="83.4900016784668" fill="#fff" d="M25.1 87.5c-2.2-3.84-.9-8.73 2.93-10.96 3.83-2.2 8.72-.9 10.95 2.94 2.2 3.84.9 8.73-2.94 10.96-3.85 2.2-8.74.9-10.95-2.94"
              style="transform: translate(100px, 100px);"></path>
            <path class="edRCTN" x="32.033552169799805" y="46.510000228881836" fill="#fff" d="M38.96 50.52c-2.2 3.84-7.12 5.15-10.95 2.94-3.82-2.2-5.12-7.12-2.92-10.96 2.2-3.84 7.12-5.15 10.95-2.94 3.83 2.23 5.14 7.12 2.94 10.96"
              style="transform: translate(100px, 100px);"></path>
            <path class="iEGVWn" stroke="#fff" stroke-width="4" stroke-linecap="round" stroke-linejoin="round" d="M63.55 27.5l32.9 19-32.9-19z"></path>
            <path class="bsocdx" stroke="#fff" stroke-width="4" stroke-linecap="round" stroke-linejoin="round" d="M96 46v38-38z"></path>
            <path class="jAZXmP" stroke="#fff" stroke-width="4" stroke-linecap="round" stroke-linejoin="round" d="M96.45 84.5l-32.9 19 32.9-19z"></path>
            <path class="hSeArx" stroke="#fff" stroke-width="4" stroke-linecap="round" stroke-linejoin="round" d="M64.45 103.5l-32.9-19 32.9 19z"></path>
            <path class="bVgqGk" stroke="#fff" stroke-width="4" stroke-linecap="round" stroke-linejoin="round" d="M32 84V46v38z"></path>
            <path class="hEFqBt" stroke="#fff" stroke-width="4" stroke-linecap="round" stroke-linejoin="round" d="M31.55 46.5l32.9-19-32.9 19z"></path>
            <path class="dzEKCM" id="Triangle-Bottom" stroke="#fff" stroke-width="4" d="M30 84h70" stroke-linecap="round"></path>
            <path class="DYnPx" id="Triangle-Left" stroke="#fff" stroke-width="4" d="M65 26L30 87" stroke-linecap="round"></path>
            <path class="hjPEAQ" id="Triangle-Right" stroke="#fff" stroke-width="4" d="M98 87L63 26" stroke-linecap="round"></path>
          </g>
        </svg>
        <div class="text">Loading
          <span class="dGfHfc">GraphQL Playground</span>
        </div>
      </div>
  
      <div id="root" />
      <script type="text/javascript">
        window.addEventListener('load', function (event) {
          const loadingWrapper = document.getElementById('loading-wrapper');
          loadingWrapper.classList.add('fadeOut');
          const root = document.getElementById('root');
          root.classList.add('playgroundIn');
          GraphQLPlayground.init(root, { endpoint: "${baseEndpoint}" })
        })
      </script>
    </body>
  </html>
  `
  
  const headers = { 'Content-Type': 'text/html' }
  const playground = (request, { baseEndpoint }) => new Response(html(baseEndpoint), { headers })
  
  export default playground