The best React custom scrollbars component
npm install react-scrollbars-custom
× DEMO
× LIVE EXAMPLE
× CHANGELOG ×
---
- Native browser scroll behavior - it don't emulate scrolling, only showing custom scrollbars,
scrolling itself still native
- Cross-browser and cross-platform - does not matter where and how, scrollbars looks the same
everywhere
- Ultimate performance - 60 FPS (using RAF) and highly optimised code
- No extra stylesheets required - minimum inline styles out of the box or you can style it yourself
however you want
- Fully customizable - want a hippo as a scrollbar thumb? Well.. I don't judge you, you're free to
do it!
- Scrollbars nesting
- Total tests coverage
- Momentum scrolling for iOS
- RTL support (read more)
- Content sizes translation (read more)
- Proper page zoom handling (native scrollbars does not show up)
``bash`
npm install react-scrollbars-customor via yarn
yarn add react-scrollbars-custom
INSTALLATION NOTE:
This lib is written in ES6+ and delivering with both, transpiled and untranspiled versions:
- main field of package.json is pointing to transpiled ES3-compatible version with CJS modulesmodule
resolution;
- field is pointing to transpiled ES3-compatible version with ES modules resolution;esnext
- field is pointing to the ES6+ version with ES modules resolution;
Depending on your targets you may have to use Webpack and/or
Babel to pull untranspiled version of package.
See some tips on wiring thing
up: https://2ality.com/2017/06/pkg-esnext.html
Underneath react-scrollbars-custom uses requestAnimationFrame loop, which check and update each
known scrollbar, and as result - scrollbars updates synchronised with browser's render flow.
The component works out of the box, with only need of width and height to be
set, inline or via CSS;
`typescript jsx
import { Scrollbar } from 'react-scrollbars-custom';
Hello world!
`
react-scrollbars-custom is syntax-compatible with IE10, but you'll have to use polyfills - for
example @babel/polyfill.
#### Styling
Probably you'll wish to customize your scrollbars on your own way via CSS - then simply
pass noDefaultStyles prop - it will prevent all inline styling from appear.
But some of styles will remain due to their need for proper component work.
#### Native mode
One more pretty common need is to disable custom scrollbars and fallback to native ones, it can be
done by passing native prop.
It'll change the generated markup:
`html`
// scrollbar.scrollerElement
As you see here - now the root element has the scrollerElement ref, but otherwise its treated as acontentElement
before (as holder). behaves as it was before.
#### Content sizes translation
In some situations you may want to make the scrollbars block of variable sizes - just
pass translateContentSize*ToHolder prop and component will automatically translatecontentElement
corresponding 's sizes to the holderElement. disableTracksWidthCompensation
If you are using default styles - it'll be handy to pass props, to
avoid infinite shrinking when it's not supposed to.
_Note:_ This wont work for native mode.
#### RTL support
react-scrollbars-custom supports RTL direction out of the box, you don't have to pass extra
parameters to make it work, it'll be detected automatically on first component's render. But you
still able to override it through the prop.
There are several things you have to know about:
- Due to performance reasons direction autodetect happens is 3 cases:
- On component mount;
- On rtl property change;
- On state isRtl set to non-boolean value;rtl
- property has priority over the style or CSS properties;rtl
- If prop has not been set (undefined) - direction will be detected automatically according tortl
content element's CSS;
- If prop is true - direction: rtl; style will be applied to hte content element;rtl
- If prop is false - no style will be applied to holder;
In some cases you may want to change the default className or tagName of elements or add extra
markup or whatever. For these purposes react-scrollbars-custom made fully customizable.
You can do absolutely what ever you want y simply passing renderer SFC to the needed props.
> IMPORTANT: Renderer will receive elementRef function that expect the DOM element's reference
> as first parameter.
> Furthermore you have to pass the styles, cause they needed to proper component work.
`typescript jsx`
const { elementRef, ...restProps } = props;
return ;
}}
wrapperProps={{
renderer: (props) => {
const { elementRef, ...restProps } = props;
return ;
},
}}
scrollerProps={{
renderer: (props) => {
const { elementRef, ...restProps } = props;
return ;
},
}}
contentProps={{
renderer: (props) => {
const { elementRef, ...restProps } = props;
return ;
},
}}
trackXProps={{
renderer: (props) => {
const { elementRef, ...restProps } = props;
return ;
},
}}
trackYProps={{
renderer: (props) => {
const { elementRef, ...restProps } = props;
return ;
},
}}
thumbXProps={{
renderer: (props) => {
const { elementRef, ...restProps } = props;
return ;
},
}}
thumbYProps={{
renderer: (props) => {
const { elementRef, ...restProps } = props;
return ;
},
}}
/>
#### Generated HTML
`html`
// scrollbar.holderElement
- If scrolling is possible or tracks are shown die to permanentScrollbar* prop - trackYVisible
/ classnames are applied to the holder element.dragging
- When thumb is dragged it'll have classname.rtl
- If direction is RTL - classname will be added to the holder element.removeTrackXWhenNotUsed
- By default whole structure described above is rendered in spite of tracks visibility, but it can
be changed by passing /removeTrackYWhenNotUsed
/ props to the component. Respective tracks will not be rendered if it is
unnecessary.
You can pass any HTMLDivElement props to the component - they'll be respectfully passed to the
holder element/renderer.
createContext _:boolean_ = undefined
Whether to create context that will contain scrollbar instance reference.
rtl _:boolean_ = undefined true - set content's direction RTL, false - LTR, undefined - autodetect according content's
style.
native _:boolean_ = undefined
Do not use custom scrollbars, use native ones instead.
mobileNative _:boolean_ = undefined native
As but enables only on mobile devices (actually when the scrollbarWidth is 0).
momentum _:boolean_ = true -webkit-overflow-scrolling: touch
Whether to use momentum scrolling, suitable for iOS (will add to
the content element).
noDefaultStyles _:boolean_ = undefined
Whether to use default visual styles.
_Note:_ Styles needed to proper component work will be passed regardless of this option.
disableTracksMousewheelScrolling _:boolean_ = undefined
Disable content scrolling while preforming a wheel event over the track.
disableTrackXMousewheelScrolling _:boolean_ = undefined
Disable content scrolling while preforming a wheel event over the track.
disableTrackYMousewheelScrolling _:boolean_ = undefined
Disable content scrolling while preforming a wheel event over the track.
disableTracksWidthCompensation _:boolean_ = undefined
Disable both vertical and horizontal wrapper indents that added in order to not let tracks overlay
content.
_Note:_ Works only with default styles enabled.
disableTrackXWidthCompensation _:boolean_ = undefined
Disable horizontal wrapper indents that added in order to not let horizontal track overlay content.
_Note:_ Works only with default styles enabled.
disableTrackYWidthCompensation _:boolean_ = undefined
Disable vertical wrapper indents that added in order to not let vertical track overlay content.
_Note:_ Works only with default styles enabled.
minimalThumbSize _:number_ = 30 minimalThumbXSize
Minimal size of both, vertical and horizontal thumbs. This option has priority
to /minimalThumbYSize props.
maximalThumbSize _:number_ = undefined maximalThumbXSize
Maximal size of both, vertical and horizontal thumbs. This option has priority
to /maximalThumbYSize props.
minimalThumbXSize _:number_ = undefined
Minimal size of horizontal thumb.
maximalThumbXSize _:number_ = undefined
Maximal size of horizontal thumb.
minimalThumbYSize _:number_ = undefined
Minimal size of vertical thumb.
maximalThumbYSize _:number_ = undefined
Maximal size of vertical thumb.
noScroll _:boolean_ = undefined
Whether to disable both vertical and horizontal scrolling.
noScrollX _:boolean_ = undefined
Whether to disable horizontal scrolling.
noScrollY _:boolean_ = undefined
Whether to disable vertical scrolling.
permanentTracks _:boolean_ = undefined
Whether to display both tracks regardless of scrolling ability.
permanentTrackX _:boolean_ = undefined
Whether to display horizontal track regardless of scrolling ability.
permanentTrackY _:boolean_ = undefined
Whether to display vertical track regardless of scrolling ability.
removeTracksWhenNotUsed _:boolean_ = undefined
Whether to remove both vertical and horizontal tracks if scrolling is not possible/blocked and
tracks are not permanent.
removeTrackYWhenNotUsed _:boolean_ = undefined
Whether to remove vertical track if scrolling is not possible/blocked and tracks are not permanent.
removeTrackXWhenNotUsed _:boolean_ = undefined
Whether to remove horizontal track if scrolling is not possible/blocked and tracks are not
permanent.
translateContentSizesToHolder _:boolean_ = undefined scrollHeight
Pass content's and scrollWidth values to the holder's height and width
styles. _Not working with behavior._
translateContentSizeYToHolder _:boolean_ = undefined scrollHeight
Pass content's values to the holder's height style. _Not working with native
behavior._
translateContentSizeXToHolder _:boolean_ = undefined scrollWidth
Pass content's values to the holder's width style. _Not working with native
behavior._
trackClickBehavior _:string_ = "jump"
The way scrolling behaves while user clicked the track:
- _jump_ - will cause straight scroll to the respective position.
- _step_ - will cause one screen step towards (like PageUp/PageDown) the clicked position.
scrollbarWidth _:number_ = undefined undefined
Scrollbar width value needed to proper native scrollbars hide. While it is detected
automatically (once per module require).
This prop is needed generally for testing purposes.
fallbackScrollbarWidth _:number_ = 20 scrollbarWidth
This value will be used in case of falsy prop. E.g. it is used for mobile devices,
because it is impossible to detect their real scrollbar width (due to their absolute positioning).
scrollTop _:number_ = undefined
Prop that allow you to set vertical scroll.
scrollLeft _:number_ = undefined
Prop that allow you to set horizontal scroll.
scrollDetectionThreshold _:number_ = 100 scrollStop
Amount of seconds after which scrolling will be treated as completed and event emitted.
elementRef _:function(ref: Scrollbar)_ = undefined
Function that receive the scrollbar instance as 1st parameter.
renderer _:SFC_ = undefined
SFC used to render the holder. More about renderers usage.
wrapperProps _:object_ = {} elementRef
Here you can pass any props for wrapper, which is usually HTMLDivElement plus propselementRef
which behaves as holder's prop.
contentProps _:object_ = {} elementRef
Here you can pass any props for content, which is usually HTMLDivElement plus propselementRef
which behaves as holder's prop.
trackXProps _:object_ = {} elementRef
Here you can pass any props for trackX, which is usually HTMLDivElement plus propselementRef
which behaves as holder's prop.
trackYProps _:object_ = {} elementRef
Here you can pass any props for trackY, which is usually HTMLDivElement plus propselementRef
which behaves as holder's prop.
thumbXProps _:object_ = {} elementRef
Here you can pass any props for thumbX, which is usually HTMLDivElement plus propselementRef
which behaves as holder's prop.
thumbYProps _:object_ = {} elementRef
Here you can pass any props for thumbY, which is usually HTMLDivElement plus propselementRef
which behaves as holder's prop.
onUpdate _:function(scrollValues: ScrollState, prevScrollValues: ScrollState)_ = undefined
Function called each time any of scroll values changed and component performed an update. It is
called after component's update.
onScroll _:function(scrollValues: ScrollState, prevScrollValues: ScrollState)_ = undefined
Function called each time scrollTop or scrollLeft has changed. It is called after component's update
and even if scrollTop/scrollLeft has been changed through the code (not by user).
onScrollStart _:function(scrollValues: ScrollState)_ = undefined
Callback that called immediately when user started scrolling (no matter how, thumb dragging,
keyboard, mousewheel and etc.).
onScrollStop _:function(scrollValues: ScrollState)_ = undefinedprops.scrollDetectionThreshold
Callback that called after milliseconds after last scroll event.
eventEmitter _:Emittr_
Event emitter that allow you to add events handler for cases when you access Scrollbars through
context
holderElement _:HTMLDivElement | null_
Holder DOM element reference or null if element was not rendered
wrapperElement _:HTMLDivElement | null_
Wrapper DOM element reference or null if element was not rendered
scrollerElement _:HTMLDivElement | null_
Scroller DOM element reference or null if element was not rendered
contentElement _:HTMLDivElement | null_
Content DOM element reference or null if element was not rendered
trackXElement _:HTMLDivElement | null_
Horizontal track DOM element reference or null if element was not rendered
trackYElement _:HTMLDivElement | null_
Vertical track DOM element reference or null if element was not rendered
thumbXElement _:HTMLDivElement | null_
Horizontal thumb DOM element reference or null if element was not rendered
thumbYElement _:HTMLDivElement | null_
Vertical thumb DOM element reference or null if element was not rendered
(get|set) scrollTop _:number_
Content's element scroll top
(get|set) scrollLeft _:number_
Content's element scroll left
(get) scrollHeight _:number_
Content's element scroll height
(get) scrollWidth _:number_
Content's element scroll width
(get) clientHeight _:number_
Content's element client height
(get) clientWidth _:number_
Content's element client width
getScrollState(force:boolean = false) _:plain object_force
Current scroll-related values, if parameter is falsy - returns cached value which updated
with RAF loop
Returned values:
`typescript
type ScrollState = {
/**
* @description Content's native clientHeight parameter
*/
clientHeight: number;
/**
* @description Content's native clientWidth parameter
*/
clientWidth: number;
/**
* @description Content's native scrollHeight parameter
*/
scrollHeight: number;
/**
* @description Content's native scrollWidth parameter
*/
scrollWidth: number;
/**
* @description Content's native scrollTop parameter
*/
scrollTop: number;
/**
* @description Content's native scrollLeft parameter
*/
scrollLeft: number;
/**
* @description Indicates whether vertical scroll blocked via properties
*/
scrollYBlocked: boolean;
/**
* @description Indicates whether horizontal scroll blocked via properties
*/
scrollXBlocked: boolean;
/**
* @description Indicates whether the content overflows vertically and scrolling not blocked
*/
scrollYPossible: boolean;
/**
* @description Indicates whether the content overflows horizontally and scrolling not blocked
*/
scrollXPossible: boolean;
/**
* @description Indicates whether vertical track is visible
*/
trackYVisible: boolean;
/**
* @description Indicates whether horizontal track is visible
*/
trackXVisible: boolean;
/**
* @description Indicates whether display direction is right-to-left
*/
isRTL?: boolean;
/**
* @description Pages zoom level - it affects scrollbars
*/
zoomLevel: number;
};
`
scrollToTop() _:this_
Scroll to the very top border of scrollable area
scrollToLeft() _:this_
Scroll to the very left border of scrollable area
scrollToBottom() _:this_
Scroll to the very bottom border of scrollable area
scrollToRight() _:this_
Scroll to the very right border of scrollable area
scrollTo(x?: number, y?: number) _:this_ undefined
Set the current scroll at given coordinates. If any value is it'll be left as is.
centerAt(x?: number, y?: number) _:this_ undefined` it'll be left as is.
Center viewport at given coordinates. If any value is