Answers for "how to get a scroll bar when overflow is hidden in html"

css show scrollbar if overflow

/*You can automatically show a scrollbar IF there is overflow with  this: */
body {
  overflow:auto;
}
/*If you want to always show a scrollbar, use this: */
body {
  overflow:scroll;
}

hide the scrollbar in css if not overflow

.myClass {
  /*auto will remove and add the scroll bar as needed*/
  overflow: auto;
}