Hide scroll bar, but while still being able to scroll

Just a test which is working fine.

#parent{
    width: 100%;
    height: 100%;
    overflow: hidden;
}

#child{
    width: 100%;
    height: 100%;
    overflow-y: scroll;
    padding-right: 17px; /* Increase/decrease this value for cross-browser compatibility */
    box-sizing: content-box; /* So the width will be 100% + 17px */
}

Working Fiddle

JavaScript:

Since the scrollbar width differs in different browsers, it is better to handle it with JavaScript. If you do Element.offsetWidth - Element.clientWidth, the exact scrollbar width will show up.

JavaScript Working Fiddle

Or

Using Position: absolute,

#parent{
    width: 100%;
    height: 100%;
    overflow: hidden;
    position: relative;
}

#child{
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: -17px; /* Increase/Decrease this value for cross-browser compatibility */
    overflow-y: scroll;
}

Working Fiddle

JavaScript Working Fiddle

Information:

Based on this answer, I created a simple scroll plugin.

This works for me with simple CSS properties:

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

For older versions of Firefox, use: overflow: -moz-scrollbars-none;

It is easy in WebKit, with optional styling:

html {
    overflow: scroll;
    overflow-x: hidden;
}
::-webkit-scrollbar {
    width: 0;  /* Remove scrollbar space */
    background: transparent;  /* Optional: just make scrollbar invisible */
}
/* Optional: show position indicator in red */
::-webkit-scrollbar-thumb {
    background: #FF0000;
}

UPDATE:

Firefox now supports hiding scrollbars with CSS, so all major browsers are now covered (Chrome, Firefox, Internet Explorer, Safari, etc.).

Simply apply the following CSS to the element you want to remove scrollbars from:

.container {
    overflow-y: scroll;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none;  /* Internet Explorer 10+ */
}
.container::-webkit-scrollbar { /* WebKit */
    width: 0;
    height: 0;
}

This is the least hacky cross browser solution that I'm currently aware of. Check out the demo.

ORIGINAL ANSWER:

Here's another way that hasn't been mentioned yet. It's really simple and only involves two divs and CSS. No JavaScript or proprietary CSS is needed, and it works in all browsers. It doesn't require explicitly setting the width of the container either, thus making it fluid.

This method uses a negative margin to move the scrollbar out of the parent and then the same amount of padding to push the content back to its original position. The technique works for vertical, horizontal and two way scrolling.

Demos:

• Vertical
• Horizontal
• Both directions

Example code for the vertical version:

HTML:

<div class="parent">
  <div class="child">
    Your content.
  </div>
</div>

CSS:

.parent {
  width: 400px;
  height: 200px;
  border: 1px solid #AAA;
  overflow: hidden;
}

.child {
  height: 100%;
  margin-right: -50px; /* Maximum width of scrollbar */
  padding-right: 50px; /* Maximum width of scrollbar */
  overflow-y: scroll;
}

Use:

<div style='overflow:hidden; width:500px;'>
   <div style='overflow:scroll; width:508px'>
      My scroll-able area
   </div>
</div>

This is a trick to somewhat overlap the scrollbar with an overlapping div which doesn't have any scroll bars:

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

This is only for WebKit browsers... Or you could use browser-specific CSS content (if there is any in future). Every browser could have a different and specific property for their respective bars.

For Microsoft Edge use: -ms-overflow-style: -ms-autohiding-scrollbar; or -ms-overflow-style: none; as per MSDN.

There is no equivalent for Firefox. Although there is a jQuery plugin to achieve this, http://manos.malihu.gr/tuts/jquery_custom_scrollbar.html

In addition, scrolling without a scroll bar for all browsers.

CSS

.keep-scrolling {
  background-color: #EEE;
  width: 200px;
  height: 100px;
  border: 1px dotted black;
  overflow-y: scroll; /* Add the ability to scroll the y axis */
}

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

/* Hide the scrollbar for Internet Explorer, Edge and Firefox */
.keep-scrolling {
  -ms-overflow-style: none;  /* Internet Explorer and Edge */
  scrollbar-width: none;  /* Firefox */
}

SCSS

.keep-scrolling {
    background-color: #EEE;
    width: 200px;
    height: 100px;
    border: 1px dotted black;
    overflow-y: scroll; /* Add the ability to scroll the y axis */

    /* Hide the scrollbar for Internet Explorer, Edge and Firefox */
    -ms-overflow-style: none;  /* Internet Explorer and Edge */
    scrollbar-width: none;  /* Firefox */

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

HTML

<div class="keep-scrolling">
</div>

Use this to hide the scrollbar but keep functionality:

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

Hide scrollbar for IE, Edge and Firefox

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

This answer doesn't include the code, so here is the solution from page:

According to the page this approach doesn't need to know the width of the scrollbar ahead of time in order to work and the solution works for all browsers too, and can be seen here.

The good thing is that you are not forced to use padding or width differences to hide the scrollbar.

This is also zoom safe. Padding/width solutions show the scrollbar when zoomed to minimum.

Firefox fix: http://jsbin.com/mugiqoveko/1/edit?output

.element,
.outer-container {
  width: 200px;
  height: 200px;
}
.outer-container {
  border: 5px solid purple;
  position: relative;
  overflow: hidden;
}
.inner-container {
  position: absolute;
  left: 0;
  overflow-x: hidden;
  overflow-y: scroll;
  padding-right: 150px;
}
.inner-container::-webkit-scrollbar {
  display: none;
}

<div class="outer-container">
  <div class="inner-container">
    <div class="element">
      Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer vehicula quam nibh, eu tristique tellus dignissim quis. Integer condimentum ultrices elit ut mattis. Praesent rhoncus tortor metus, nec pellentesque enim mattis nec. Nulla vitae turpis ut
      dui consectetur pellentesque quis vel est. Curabitur rutrum, mauris ut mollis lobortis, sem est congue lectus, ut sodales nunc leo a libero. Cras quis sapien in mi fringilla tempus condimentum quis velit. Aliquam id aliquam arcu. Morbi tristique
      aliquam rutrum. Duis tincidunt, orci suscipit cursus molestie, purus nisi pharetra dui, tempor dignissim felis turpis in mi. Vivamus ullamcorper arcu sit amet mauris egestas egestas. Vestibulum turpis neque, condimentum a tincidunt quis, molestie
      vel justo. Sed molestie nunc dapibus arcu feugiat, ut sollicitudin metus sagittis. Aliquam a volutpat sem. Quisque id magna ultrices, lobortis dui eget, pretium libero. Curabitur aliquam in ante eu ultricies.
    </div>
  </div>
</div>

Just use following three lines and your problem will be solved:

#liaddshapes::-webkit-scrollbar {
    width: 0 !important;
}

Where liaddshapes is the name of the div where scroll is coming.

This works for me cross-browser. However, this doesn't hide native scrollbars on mobile browsers.

In SCSS

.hide-native-scrollbar {
  scrollbar-width: none; /* Firefox 64 */
  -ms-overflow-style: none; /* Internet Explorer 11 */
  &::-webkit-scrollbar { /** WebKit */
    display: none;
  }
}

In CSS

.hide-native-scrollbar {
  scrollbar-width: none; /* Firefox 64 */
  -ms-overflow-style: none; /* Internet Explorer 11 */
}
.hide-native-scrollbar::-webkit-scrollbar { /** WebKit */
  display: none;
}

Just write this code:

::-webkit-scrollbar {
  width: 0px;
}

Or

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

This worked for me

div {
  -ms-overflow-style: none; /* Edge, Internet Explorer */
  scrollbar-width: none; /* Firefox */
  overflow-y: scroll;
}

// hides scrollbars while allowing to scroll
div::-webkit-scrollbar {
  display: none; /* Chrome, Safari, Opera */
}

scrollbar-width: none; 

works for me.

The following was working for me on Microsoft, Chrome and Mozilla for a specific div element:

div.rightsidebar {
    overflow-y: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
div.rightsidebar::-webkit-scrollbar { 
    width: 0 !important;
}

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

Everything you've written is correct except "overflow". webkit for Chrome and other browsers

overflow-y: scroll;

or

overflow-y: auto;

For Firefox and Edge

scrollbar-width: none;

or

scrollbar-width: thin;

As of December 11th 2018 (Firefox 64 and above), the answer to this question is very simple indeed as Firefox 64+ now implements the CSS Scrollbar Styling spec.

Just use the following CSS:

scrollbar-width: none;

Firefox 64 release note link here.

To hide scroll bars for elements with overflowing content use.

.div{

  scrollbar-width: none; /* The most elegant way for Firefox */
}

HTML:

<div class="parent">
    <div class="child">
    </div>
</div>

CSS:

.parent{
    position: relative;
    width: 300px;
    height: 150px;
    border: 1px solid black;
    overflow: hidden;
}

.child {
    height: 150px;   
    width: 318px;
    overflow-y: scroll;
}

Apply CSS accordingly.

Check it here (tested in Internet Explorer and Firefox).

On modern browsers you can use wheel event:

// Content is the element you want to apply the wheel scroll effect to
content.addEventListener('wheel', function(e) {
    const step = 100; // How many pixels to scroll

    if (e.deltaY > 0) // Scroll down
        content.scrollTop += step;
    else // Scroll up
        content.scrollTop -= step;
});

The following Sass styling should make your scrollbar transparent on most browsers (Firefox is not supported):

.hide-scrollbar {
  scrollbar-width: thin;
  scrollbar-color: transparent transparent;

  &::-webkit-scrollbar {
    width: 1px;
  }

  &::-webkit-scrollbar-track {
    background: transparent;
  }

  &::-webkit-scrollbar-thumb {
    background-color: transparent;
  }
}

Use

function reloadScrollBars() {
    document.documentElement.style.overflow = 'auto';  // Firefox, Chrome
    document.body.scroll = "yes"; // Internet Explorer only
}

function unloadScrollBars() {
    document.documentElement.style.overflow = 'hidden';  // firefox, chrome
    document.body.scroll = "no"; // Internet Explorer only
}

Call these functions for any point you want to load or unload or reload the scrollbars. It is still scrollable in Chrome as I tested it in Chrome, but I am not sure of the other browsers.

Use:

CSS

#subparent {
    overflow: hidden;
    width: 500px;
    border: 1px rgba(0, 0, 0, 1.00) solid;
}

#parent {
    width: 515px;
    height: 300px;
    overflow-y: auto;
    overflow-x: hidden;
    opacity: 10%;
}

#child {
    width: 511px;
    background-color: rgba(123, 8, 10, 0.42);
}

HTML

<body>
    <div id="subparent">
        <div id="parent">
            <div id="child">
                <!- Code here for scroll ->
            </div>
        </div>
     </div>
</body>

This works for me:

scroll-content {
    overflow-x: hidden;
    overflow-y: scroll;
}

scroll-content::-webkit-scrollbar {
    width: 0;
}

This is how I do it for horizontal scroll; only CSS and works well with frameworks like Bootstrap / col-*. It only needs two extra divs and the parent with a width or max-width set:

You can select the text to make it scroll or scroll it with fingers if you have a touchscreen.

.overflow-x-scroll-no-scrollbar {
    overflow: hidden;
}
.overflow-x-scroll-no-scrollbar div {
    overflow-x: hidden;
    margin-bottom: -17px;
    overflow-y: hidden;
    width: 100%;
}
.overflow-x-scroll-no-scrollbar div * {
    overflow-x: auto;
    width: 100%;
    padding-bottom: 17px;
    white-space: nowrap;
    cursor: pointer
}

/* The following classes are only here to make the example looks nicer */
.row {
    width: 100%
}
.col-xs-4 {
    width: 33%;
    float: left
}
.col-xs-3 {
    width:25%;
    float:left
}
.bg-gray {
    background-color: #DDDDDD
}
.bg-orange {
    background-color:#FF9966
}
.bg-blue {
    background-color: #6699FF
}
.bg-orange-light{
    background-color: #FFAA88
}
.bg-blue-light{
    background-color: #88AAFF
}

<html><body>
  <div class="row">
    <div class="col-xs-4 bg-orange">Column 1</div>
    <div class="col-xs-3 bg-gray">Column 2</div>
    <div class="col-xs-4 bg-blue">Column 3</div>
  </div>
  <div class="row">
    <div class="col-xs-4 bg-orange-light">Content 1</div>
    <div class="col-xs-3 overflow-x-scroll-no-scrollbar">
      <div>
        <div>This content too long for the container, so it needs to be hidden but scrollable without scrollbars</div>
      </div>
    </div>
    <div class="col-xs-4 bg-blue-light">Content 3</div>
  </div>
</body></html>

Short version for lazy people:

.overflow-x-scroll-no-scrollbar {
    overflow: hidden;
}
.overflow-x-scroll-no-scrollbar div {
  overflow-x: hidden;
  margin-bottom: -17px;
  overflow-y: hidden;
  width: 100%;
}
.overflow-x-scroll-no-scrollbar div * {
  overflow-x: auto;
  width: 100%;
  padding-bottom: 17px;
  white-space: nowrap;
  cursor:pointer
}

/* The following classes are only here to make the example looks nicer */
.parent-style {
    width: 100px;
    background-color: #FF9966
}

<div class="parent-style overflow-x-scroll-no-scrollbar">
  <div>
    <div>This content too long for the container, so it needs to be hidden but scrollable without scrollbars</div>
  </div>
</div>

My problem: I don't want any style in my HTML content. I want my body directly scrollable without any scrollbar, and only a vertical scroll, working with CSS grids for any screen size.

The box-sizing value impact padding or margin solutions, they works with box-sizing:content-box.

I still need the "-moz-scrollbars-none" directive, and like gdoron and Mr_Green, I had to hide the scrollbar. I tried -moz-transform and -moz-padding-start, to impact only Firefox, but there was responsive side effects that needed too much work.

This solution works for HTML body content with "display: grid" style, and it is responsive.

/* Hide HTML and body scroll bar in CSS grid context */
html, body {
  position: static; /* Or relative or fixed ... */
  box-sizing: content-box; /* Important for hidding scrollbar */
  display: grid; /* For CSS grid */

  /* Full screen */
  width: 100vw;
  min-width: 100vw;
  max-width: 100vw;
  height: 100vh;
  min-height: 100vh;
  max-height: 100vh;
  margin: 0;
  padding: 0;
}

html {
  -ms-overflow-style: none;  /* Internet Explorer 10+ */
  overflow: -moz-scrollbars-none; /* Should hide the scroll bar */
}

/* No scroll bar for Safari and Chrome */
html::-webkit-scrollbar,
body::-webkit-scrollbar {
  display: none; /* Might be enough */
  background: transparent;
  visibility: hidden;
  width: 0px;
}

/* Firefox only workaround */
@-moz-document url-prefix() {
  /* Make HTML with overflow hidden */
  html {
    overflow: hidden;
  }

  /* Make body max height auto */
  /* Set right scroll bar out the screen  */
  body {
    /* Enable scrolling content */
    max-height: auto;

    /* 100vw +15px: trick to set the scroll bar out the screen */
    width: calc(100vw + 15px);
    min-width: calc(100vw + 15px);
    max-width: calc(100vw + 15px);

    /* Set back the content inside the screen */
    padding-right: 15px;
  }
}

body {
  /* Allow vertical scroll */
  overflow-y: scroll;
}

.your-overflow-scroll-class::-webkit-scrollbar {
  ...
  width: 0.5rem; //only hide the vertical scrollbar
  height: 0px; //only hide the horizontal scrollbar
}

This will be at the body:

<div id="maincontainer" >
    <div id="child">this is the 1st step</div>
    <div id="child">this is the 2nd step</div>
    <div id="child">this is the 3rd step</div>
</div>

And this is the CSS:

#maincontainer
{
    background: grey;
    width: 101%;
    height: 101%;
    overflow: auto;
    position: fixed;
}

#child
{
    background: white;
    height: 500px;
}

Adding padding to an inner div, as in the currently accepted answer, won't work if for some reason you want to use box-model: border-box.

What does work in both cases is increasing the width of the inner div to 100% plus the scrollbar's width (assuming overflow: hidden on the outer div).

For example, in CSS:

.container2 {
    width: calc(100% + 19px);
}

In JavaScript, cross-browser:

var child = document.getElementById('container2');
var addWidth = child.offsetWidth - child.clientWidth + "px";
child.style.width = 'calc(100% + ' + addWidth + ')';

You can use the code below to hide the scroll bar, but while still being able to scroll:

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

I happen to try the above solutions in my project and for some reason I was not able to hide the scroll bar due to div positioning. Hence, I decided to hide the scroll bar by introducing a div that covers it superficially. Example below is for a horizontal scroll bar:

<div id="container">
  <div id="content">
     My content that could overflow horizontally
  </div>
  <div id="scroll-cover">
     &nbsp; 
  </div>
</div>

Corresponding CSS is as follows:

#container{
   width: 100%;
   height: 100%;
   overflow: hidden;
   position: relative;
}

#content{
  width: 100%;
  height: 100%;
  overflow-x: scroll;
}
#scroll-cover{
  width: 100%;
  height: 20px;
  position: absolute;
  bottom: 0;
  background-color: #fff; /*change this to match color of page*/
}