Open Tab in iOS Safari with JavaScript vanilla

open-tab.js

const loadingPage = `
<style>
  /*Huge thanks to @tobiasahlin at http://tobiasahlin.com/spinkit/ */
  .spinner {
    margin: 100px auto 0;
    width: 70px;
    text-align: center;
  }

  .spinner > div {
    width: 18px;
    height: 18px;
    background-color: #333;

    border-radius: 100%;
    display: inline-block;
    -webkit-animation: sk-bouncedelay 1.4s infinite ease-in-out both;
    animation: sk-bouncedelay 1.4s infinite ease-in-out both;
  }

  .spinner .bounce1 {
    -webkit-animation-delay: -0.32s;
    animation-delay: -0.32s;
  }

  .spinner .bounce2 {
    -webkit-animation-delay: -0.16s;
    animation-delay: -0.16s;
  }

  @-webkit-keyframes sk-bouncedelay {
    0%, 80%, 100% { -webkit-transform: scale(0) }
    40% { -webkit-transform: scale(1.0) }
  }

  @keyframes sk-bouncedelay {
    0%, 80%, 100% {
      -webkit-transform: scale(0);
      transform: scale(0);
    } 40% {
      -webkit-transform: scale(1.0);
      transform: scale(1.0);
    }
  }
</style>
<div class="spinner">
  <div class="bounce1"></div>
  <div class="bounce2"></div>
  <div class="bounce3"></div>
</div>
`;

const asyncFunction = async (randomParams, newTab) => {
  try {
    /**
     * Process your requests or call async function
     */
    
    if (newTab.location) {
      newTab.location = "https://www.google.com";
    }
  } catch(err) {
    if (newTab.close) {
      newTab.close();
    }
    /**
     * Process error
     */
  }
}

const callAsyncFunction = () => {
  const randomParam = "Hello World";
  let newTab;

  if (typeof window === "object") {
    newTab = window.open();
  
    if (newTab) {
      newTab.document.body.innerHTML = loadingPage;
    }
  }
  
  asyncFunction(randomParam, newTab);
}