Check out example codes for "css to hide scrollbar". It will help you in understanding the concepts better.

Code Example 1

/* Hide scrollbar for Chrome, Safari and Opera */

  .example::-webkit-scrollbar {
  display: none;
}

/* Hide scrollbar 
  for IE and Edge */
.example {
  -ms-overflow-style: none;
}

Code Example 2

function HideScrollbar() {
  var style = document.createElement("style");
  style.innerHTML = `body::-webkit-scrollbar {display: none;}`;
  document.head.appendChild(style);
}

Code Example 3

/* Hide scrollbar for Chrome, Safari and Opera */
.example::-webkit-scrollbar {
  display: none;
}

/* Hide scrollbar for IE and Edge */
.example {
  -ms-overflow-style: none;
}

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