ionic-keyboard-cover-input-fix.js

const fixScrollToInput = () => {
  // resize is not finished (body height must be smaller because keyboard)
  if (document.body.offsetHeight == window.bodyHeight) {
    setTimeout(fixScrollToInput, 100);
  }
  // check if element is hidden by keyboard
  else if (document.activeElement.getBoundingClientRect().top > document.body.offsetHeight) {
    document.activeElement.scrollIntoView({behavior: 'smooth', lock: "center"});
  }
}

const calculateBodyHeight = () => {
  window.bodyHeight = document.body.offsetHeight;
  if (!window.bodyHeight) setTimeout(calculateBodyHeight, 100);
};

document.addEventListener("deviceready", () => {
  calculateBodyHeight();
  window.addEventListener('keyboardDidShow', fixScrollToInput);
}, false);