npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

om-perfect-scrollbar

v2.0.1

Published

Minimalistic but perfect custom scrollbar plugin

Downloads

7,486

Readme

Official documentation

The official documentation can be found here. To read documentation for versions < 1.0, please visit v0.8.1.


Why perfect-scrollbar?

perfect-scrollbar is minimalistic but perfect (for us, and maybe for most developers) scrollbar plugin.

  • No change on design layout
  • No manipulation on DOM tree
  • Use plain scrollTop and scrollLeft
  • Scrollbar style is fully customizable
  • Efficient update on layout change

We hope you will love it!

Live preview

Check out the Live Preview snippet. You can fork it right away for testing and experimenting purposes.

More useful plugins

You'll find some example plugins below, you can explore all of them here

Datatable Plugin| Treeview Plugin| Filter Plugin ------------ | ------------- | ------------- | |


Table of Contents

Install

Download now

You can manually download perfect-scrollbar here.

npm

You can install and use perfect-scrollbar with npm. It's registered as perfect-scrollbar.

$ npm install om-perfect-scrollbar

From sources

If you want to use the development version of the plugin, build from source manually. The development version may be unstable.

$ git clone https://github.com/omishyn/perfect-scrollbar.git
$ cd perfect-scrollbar
$ npm install
$ npm run build

Unofficial sources

Sources not mentioned above are not maintained officially. If there are issues of the following sources, please ask and resolve in each repository.

Before using perfect-scrollbar

The following requirements should meet.

  • the container must have a position style.
  • the container must be a normal container element.

The following requirements are included in the basic CSS, but please keep in mind when you'd like to change the CSS files.

  • the container must have an overflow: hidden css style.
  • the scrollbar's position must be absolute.
  • the scrollbar-x must have bottom or top, and the scrollbar-y must have right or left.

Finally, scroll hooking is generally considered as a bad practice, and perfect-scrollbar should be used carefully. Unless custom scroll is really needed, using browser-native scroll is always recommended.

Caveats

perfect-scrollbar emulates some scrolls, but not all of the kinds. It also does not work in some situations. You can find these cases in Caveats. Basically, items listed in the caveats are hacky to implement and may not be implemented in the future. If the features are really needed, please consider using browser-native scroll.

How to use

First of all, please check if the container element meets the requirements and the main CSS is imported.

<style>
  #container {
    position: relative;
    width: 600px;
    height: 400px;
  }
</style>
<link rel="stylesheet" href="css/perfect-scrollbar.css">

Import via ES modules:

import PerfectScrollbar from 'om-perfect-scrollbar';

Or in browser:

<script src="dist/perfect-scrollbar.js"></script>

To initialise:

const container = document.querySelector('#container');
const ps = new PerfectScrollbar(container);

// or just with selector string
const ps = new PerfectScrollbar('#container');

It can be initialised with options.

const ps = new PerfectScrollbar('#container', {
  wheelSpeed: 2,
  wheelPropagation: true,
  minScrollbarLength: 20
});

If the size of your container or content changes, call update.

ps.update();

If you want to destroy the scrollbar, use destroy.

ps.destroy();
ps = null; // to make sure garbages are collected

If you want to scroll to somewhere, just update scrollTop.

const container = document.querySelector('#container');
container.scrollTop = 0;

You can also get information about how to use the plugin from code in examples/.

Options

handlers {String[]}

It is a list of handlers to scroll the element.

Default: ['click-rail', 'drag-thumb', 'keyboard', 'wheel', 'touch']

wheelSpeed {Number}

The scroll speed applied to mousewheel event.

Default: 1

wheelPropagation {Boolean}

If this option is true, when the scroll reaches the end of the side, mousewheel event will be propagated to parent element.

Default: true

swipeEasing {Boolean}

If this option is true, swipe scrolling will be eased.

Default: true

minScrollbarLength {Number?}

When set to an integer value, the thumb part of the scrollbar will not shrink below that number of pixels.

Default: null

maxScrollbarLength {Number?}

When set to an integer value, the thumb part of the scrollbar will not expand over that number of pixels.

Default: null

scrollingThreshold {Number}

This sets threshold for ps--scrolling-x and ps--scrolling-y classes to remain. In the default CSS, they make scrollbars shown regardless of hover state. The unit is millisecond.

Default: 1000

useBothWheelAxes {Boolean}

When set to true, and only one (vertical or horizontal) scrollbar is visible then both vertical and horizontal scrolling will affect the scrollbar.

Default: false

suppressScrollX {Boolean}

When set to true, the scrollbar in X-axis will not be available, regardless of the content width.

Default: false

suppressScrollY {Boolean}

When set to true, the scroll bar in Y-axis will not be available, regardless of the content height.

Default: false

scrollXMarginOffset {Number}

The number of pixels the content width can surpass the container width without enabling the X-axis scroll bar. Allows some "wiggle room" or "offset break", so that X-axis scroll bar is not enabled just because of a few pixels.

Default: 0

scrollYMarginOffset {Number}

The number of pixels the content height can surpass the container height without enabling the Y-axis scroll bar. Allows some "wiggle room" or "offset break", so that Y-axis scroll bar is not enabled just because of a few pixels.

Default: 0

Events

perfect-scrollbar dispatches custom events.

container.addEventListener('ps-scroll-x', () => {/* ... */});

ps-scroll-y

This event fires when the y-axis is scrolled in either direction.

ps-scroll-x

This event fires when the x-axis is scrolled in either direction.

ps-scroll-up

This event fires when scrolling upwards.

ps-scroll-down

This event fires when scrolling downwards.

ps-scroll-left

This event fires when scrolling to the left.

ps-scroll-right

This event fires when scrolling to the right.

ps-y-reach-start

This event fires when scrolling reaches the start of the y-axis.

ps-y-reach-end

This event fires when scrolling reaches the end of the y-axis (useful for infinite scroll).

ps-x-reach-start

This event fires when scrolling reaches the start of the x-axis.

ps-x-reach-end

This event fires when scrolling reaches the end of the x-axis.

You can also watch the reach state via the reach property.

const ps = new PerfectScrollbar(/* ... */);

console.log(ps.reach.x); // => 'start' or 'end' or null
console.log(ps.reach.y); // => 'start' or 'end' or null

Helpdesk

If you have any idea to improve this project or any problem using this, please feel free to upload an issue.

For common problems, there is a FAQ wiki page. Please check the page before uploading an issue.

Also, the project is not actively maintained. No maintainer is paid, and most of us are busy on our professional or personal works. Please understand that it may take a while for an issue to be resolved. Uploading a PR would be the fastest way to fix an issue.

IE Support

The plugin is developed to work in modern MS browsers including Edge and IE11, but may have some issues in IE11 mainly because of IE rendering bug concerning sync update on scroll properties. The problem is mentioned in Caveats too.

IE<11 is not supported, and patches to fix problems in IE<=10 will not be accepted. When old IEs should be supported, please fork the project and make modification locally.

License

MIT

Related resources

Social Media

MDB PRO