Only show scrollbar when page scrolls in css

css, html, javascript

Solution

If you hook up on the elements `scroll` event, you could do something like this, where you set the `inner` to `width: 100%` and a `padding-right: 20px`. (the padding right value need to be bigger than the scrollbar is wide)

That will push the scrollbar out of view, and on scroll you remove the padding, init a timer which will reset the padding if one stop scrolling

(function(timer) {
  window.addEventListener('load', function() {
    var el = document.querySelector('.inner');
    el.addEventListener('scroll', function(e) {
    (function(el){
      el.style.padding = '0';
      clearTimeout(timer);
      timer = setTimeout(function() {
        el.style.paddingRight = '20px';      
      }, 100);    
    })(el);
    })
  })
})();

.outer {
  height: 180px;
  width: 500px;
  border: 1px solid green;
  overflow: hidden;
}

.inner {
  width: 100%;
  height: 99%;
  overflow: auto;
  padding-right: 20px;
}

<div class="outer">
  <div class="inner">
    Some content<br>Some content<br>Some content<br> Some content<br>Some content<br>Some content<br> Some content<br>Some content<br>Some content<br> Some content<br>Some content<br>Some content<br> Some content<br>Some content<br>Some content<br> Some
    content<br>Some content<br>Some content<br> Some content<br>Some content<br>Some content<br> Some content<br>Some content<br>Some content<br> Some content<br>Some content<br>Some content<br> Some content<br>Some content<br>Some content<br> Some content<br>Some
    content<br>Some content<br> Some content<br>Some content<br>Some content<br> Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>
  </div>
</div>

Updated, toggling a class, using `Element.classList`, instead of an inline style, which might be a more recommended way.

(function(timer) {
  window.addEventListener('load', function() {
    var el = document.querySelector('.inner');
    el.addEventListener('scroll', function(e) {
    (function(el){
      el.classList.add('scroll');
      clearTimeout(timer);
      timer = setTimeout(function() {
        el.classList.remove('scroll');
      }, 100);    
    })(el);
    })
  })
})();

.outer {
  height: 180px;
  width: 500px;
  border: 1px solid green;
  overflow: hidden;
}

.inner {
  width: 100%;
  height: 99%;
  overflow: auto;
  padding-right: 20px;
}
.inner.scroll {
  padding-right: 0;
}

<div class="outer">
  <div class="inner">
    Some content<br>Some content<br>Some content<br> Some content<br>Some content<br>Some content<br> Some content<br>Some content<br>Some content<br> Some content<br>Some content<br>Some content<br> Some content<br>Some content<br>Some content<br> Some
    content<br>Some content<br>Some content<br> Some content<br>Some content<br>Some content<br> Some content<br>Some content<br>Some content<br> Some content<br>Some content<br>Some content<br> Some content<br>Some content<br>Some content<br> Some content<br>Some
    content<br>Some content<br> Some content<br>Some content<br>Some content<br> Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>Some content<br>
  </div>
</div>

Problem

I have an html page of different kinds of images in a `<div>` with following CSS property: ``` .images_container { position: relative; height: calc(100% - 200px); padding-top: 20px; overflow: auto; margin: auto; } ``` Currently page scrollbar is showing but I want to show the scrollbar only when user scrolls the page. Is this possible in CSS or JavaScript?

Original source

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