#1 the IOS version check

$(function(){
const ver = iOSversion();
if (ver[0] >= 12) {
alert('11 or later')
$('.register-box .policy').css({'-webkit-overflow-scrolling': 'touch'});
}/* else{
$('.register-box .policy').css({'-webkit-overflow-scrolling': 'touch'});
} */
});
function iOSversion() {
if (/iP(hone|od|ad)/.test(navigator.platform)) {
// supports iOS 2.0 and later: <http://bit.ly/TJjs1V>
var v = (navigator.appVersion).match(/OS (\d+)_(\d+)_?(\d+)?/);
return [parseInt(v[1], 10), parseInt(v[2], 10), parseInt(v[3] || 0, 10)];
}
}

• 담당자의 아이폰5는 버전 10
• 우리의 아이폰은 12
• 왜 업데이트를 안하지?
• css display:flex 안먹어서 position, left , right으로 값 변경

#ref

https://stackoverflow.com/questions/8348139/detect-ios-version-less-than-5-with-javascript