supports position: sticky in javascript #learninpublic

supports position: sticky in javascript.js

// es-5 compatible
function supportsPositionSticky() {
  var element = document.createElement('div');
  return ['', '-o-', '-webkit-', '-moz-', '-ms-'].filter(function(prefix) {
    element.style.position = prefix + 'sticky';
    return element.style.position === 'sticky';
  }).length !== 0;
}

// es-next compatible
function supportsPositionSticky() {
  const element = document.createElement('div');
  return ['', '-o-', '-webkit-', '-moz-', '-ms-'].some(prefix => {
    element.style.position = prefix + 'sticky';
    return element.style.position === 'sticky';
  });
}