CSS

hide scrollbar but still scroll

.class {
    -ms-overflow-style: none;  /* Internet Explorer 10+ */
    scrollbar-width: none;  /* Firefox */
}
.class::-webkit-scrollbar { 
    display: none;  /* Safari and Chrome */
}

Hide scroll bar, but while still being able to scroll

.container {
    -ms-overflow-style: none;  /* Internet Explorer 10+ */
    scrollbar-width: none;  /* Firefox */
}
.container::-webkit-scrollbar { 
    display: none;  /* Safari and Chrome */
}

hide scroll bar but still be scrollable.

.element::-webkit-scrollbar { width: 0 !important }

hide scrollbar but still scroll

//Hide scrollbar completly (vertical & horizontaly) scrollbar but still able to scroll
/* replace ".container" with your "id" or "className" */
.container {
  -ms-overflow-style: none;  
  scrollbar-width: none;
}
.container::-webkit-scrollbar { 
  display: none; 
}

css hide scrollbar but scrollable

-webkit- (Chrome, Safari, newer versions of Opera):
.element::-webkit-scrollbar { width: 0 !important }
-moz- (Firefox):
.element { overflow: -moz-scrollbars-none; }
-ms- (Internet Explorer +10):
.element { -ms-overflow-style: none; }

hide scroll bar when not needed

    overflow: auto;