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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <!-- For sloppy testing: Add os_iOS or os_Android to <main> -->

<!-- Better to use a real device though -->

<main class=os_iOS-or-os_Android>

  <h1>Hide an unsupported OS download button on mobile</h1>

  <section class=btns_cnt-downloads>

    <a class=dwnld_lnk-apple href>
      <svg class=dwnld_img-apple aria-label="Apple app: Download from the App Store"><use xlink:href="#btn_app_store"></use></svg>
    </a>

    <a class=dwnld_lnk-android href>
      <svg class=dwnld_img-google aria-label="Android app: Get it on Google Play"><use xlink:href="#btn_google_play"></use></svg>
    </a>

  </section>

  <p>Detection script adds <code>.os_iOS</code> or <code>.os_Android</code> to the <code>html</code> element.<br>
    Buttons below fake that detection purely for visualisation purposes:
  </p>
  
  <section class=btns_cnt-fakes>
    <button class=fake_btn-os_iOS>Fake iOS</button>
    <button class=fake_btn-os_Android>Fake Android</button>
  </section>

</main>

<svg class=visually-hidden id=buttons-appStore-googlePlay>
  <defs>

    <symbol id="btn_app_store" width="135" height="40" fill="#FFF" viewBox="0 0 135 40">

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[[[https://codepen.io/2kool2/pen/mKeeGM]]]
            
          
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  color: hsl(269,19%,30%);
  background-color: hsla(32,100%,85%,.35);
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg width='100%25' xmlns='http://www.w3.org/2000/svg'%3E%3Cdefs%3E%3Cfilter id='a'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.4'/%3E%3C/filter%3E%3C/defs%3E%3C!-- %3Cpath filter='url(%23a)' opacity='.3' d='M0 0h1200v256H0z'/%3E--%3E%3Crect filter='url(%23a)' opacity='.3' width='100%25' height='100%25'/%3E%3C/svg%3E");
}
h1 {
  font-weight: 100;
  line-height: 1.3;
  text-align: center;
  margin-bottom: .5rem;
}
p {
  text-align: center;
  margin: 1rem 0 .5rem;
}
code {
  font-size: 16px;
  text-shadow: 1px 1px #fff;
}
.visually-hidden {
  position: absolute !important;
  height: 1px;
  width: 1px; 
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
}

[class^="btns_cnt"] {
  display: grid;
  grid-gap: var(--gap);
  grid-template-columns: var(--columns);
  justify-content: center;
  max-width: 330px;
  margin: 0 auto;
  padding: 1rem 0;
}
[class^="dwnld_lnk"] {
  background-color: #000;
  border-radius: 4px;
  box-shadow: 0 .25em .25em rgba(0,0,0,.3);
  transition: all 0.3s ease-out;
  display: block;
  margin: 0 auto;
  text-decoration: none;
}
[class^="dwnld_lnk"]:hover,
[class^="dwnld_lnk"]:focus {
  transform: scale(1.1);
  box-shadow: 0 .35em .35em rgba(0,0,0,.4);
}
[class^="dwnld_img"] {
  display: block;
  margin: 0 auto;
  width: 135px;
  height: 40px;
}


/* Hide unsupported button */
:root[class^="os_"] .btns_cnt-downloads {
  --columns: 1fr;
  --gap: 1rem;
}
.os_Android .dwnld_lnk-apple,
.os_iOS .dwnld_lnk-android {
  display: none;
}


/* Faking the OS buttons */

[class^="fake_btn"] {
  font: inherit;
  color: #503660;
  background-color: #fff;
  min-width: 98px;
  border: 2px solid hsl(269,19%,30%);
  padding: .5rem 1rem .25rem;
  border-radius: 4px;
  transition: all 0.3s ease-out;
  display: block;
  margin: 0 auto;
  text-decoration: none;
  box-shadow: 0 .25em .25em rgba(0,0,0,.3);
}
[class^="fake_btn"]:hover,
[class^="fake_btn"]:focus {
  color: #418cec;
  border-color: #418cec;
  box-shadow: 0 .5em .5em rgba(0,0,0,.4);
}

.os_iOS .fake_btn-os_iOS,
.os_Android .fake_btn-os_Android {
  background-color: lightgreen;
}

            
          
!
            
              // Uses device detection to add a class to <html> but only if an Android or Apple mobile.
// Purposefully ES5
// Based on: https://stackoverflow.com/questions/21741841/detecting-ios-android-operating-system

var detect_OS_set_HTML_class = (function() {
  
  "use strict";

  var html = document.documentElement;
  var userAgent = navigator.userAgent || navigator.vendor || window.opera;

  // Windows Phone must come first because its UA also contains "Android"

  if (/windows phone/i.test(userAgent)) {
    // html.className += " os_Windows";
    return "Windows";
  }

  if (/android/i.test(userAgent)) {
    html.className += " os_Android";
    return "Android";
  }

  // iOS detection from: http://stackoverflow.com/a/9039885/177710

  if (/iPad|iPhone|iPod/.test(userAgent) && !window.MSStream) {
    html.className += " os_iOS";
    return "iOS";
  }

  return "Unknown";

})();




/* Faking-up the OS buttons
   Buttons add .os_iOS or .os_Android to <html> */

const fake_OS_detection_set_HTML_class_from_button = (function() {

  "use strict";

  const class_iOS = "os_iOS";
  const class_Android = "os_Android";
  const html = document.documentElement;
  const buttons = document.querySelectorAll("[class*=fake_btn]");

  if (!buttons) return false;

  const resetHTMLClass = () => {
    html.classList.remove(class_iOS, class_Android);
  };
  
  const setHTMLClass = (btn, clss, is_os) => {
    if (btn.className.match(clss)) {
      if (!is_os) {
        html.classList.add(clss);
      }
    }
  };

  const fakeBtnClick = (event) => {
    const btn = event.target;
    const is_iOS = html.classList.contains(class_iOS);
    const is_Android = html.classList.contains(class_Android);
    resetHTMLClass();
    setHTMLClass(btn, class_iOS, is_iOS);
    setHTMLClass(btn, class_Android, is_Android);
  };

  for (let btn of buttons) {
    btn.addEventListener("click", fakeBtnClick);
  }
})();
            
          
!
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