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overlayscrollbars-ngx

v0.5.2

Published

OverlayScrollbars for Angular.

Downloads

18,022

Readme

OverlayScrollbars Angular Downloads Version License

OverlayScrollbars for Angular

This is the official OverlayScrollbars Angular wrapper.

Installation

npm install overlayscrollbars-ngx

Peer Dependencies

OverlayScrollbars for Angular has the following peer dependencies:

npm install overlayscrollbars
npm install @angular/core @angular/common

Usage

The first step is to import the CSS file into your app:

import 'overlayscrollbars/overlayscrollbars.css';

Note: If the path 'overlayscrollbars/overlayscrollbars.css' is not working use 'overlayscrollbars/styles/overlayscrollbars.css' as the import path for the CSS file.

The module can be imported like:

import { NgModule } from "@angular/core";
import { OverlayscrollbarsModule } from "overlayscrollbars-ngx";

@NgModule({
  imports: [OverlayscrollbarsModule],
})
export class AppModule {}

Component

The main entry point is the OverlayScrollbarsComponent which can be used in your application as a component:

import { OverlayScrollbarsComponent } from "overlayscrollbars-ngx";

The component can be used with two different selectors:

<overlay-scrollbars [defer]="true">
  The tag isn't important
</overlay-scrollbars>

<section overlay-scrollbars [defer]="true">
  Choose the tag
</section>

Properties

The component accepts all properties of regular elements such as div and span. Additionally it has custom optional properties:

  • options: accepts an object which represents the OverlayScrollbars options.
  • events: accepts an object which represents the OverlayScrollbars events.
  • defer: accepts an boolean or object. Defers the initialization to a point in time when the browser is idle.

Note: Its highly recommended to use the defer option whenever possible to defer the initialization to a browser's idle period.

<!-- example usage -->
<overlay-scrollbars
  [options]="{ scrollbars: { autoHide: 'scroll' } }"
  [events]="{ scroll: () => { /* ... */ } }"
  [defer]="true"
></overlay-scrollbars>

Events

Additionally to the events property the OverlayScrollbarsComponent emits "native" Angular events. To prevent name collisions with DOM events the events have a os prefix.

Note: It doesn't matter whether you use the events property or the Angular events or both.

<!-- example usage -->
<div
  overlay-scrollbars
  (osInitialized)="onInitialized"
  (osUpdated)="onUpdated"
  (osDestroyed)="onDestroyed"
  (osScroll)="onScroll"
></div>

All events are typed, but you can use the EventListenerArgs type as utility in case its needed:

import type { EventListenerArgs } from 'overlayscrollbars';

// example listener
const onUpdated = ([instance, onUpdatedArgs]: EventListenerArgs['updated']) => {}

Ref

The ref of the OverlayScrollbarsComponent will give you an object with which you can access the OverlayScrollbars instance and the root element of the component.
The ref object has two properties:

  • osInstance: a function which returns the OverlayScrollbars instance.
  • getElement: a function which returns the root element.

Directive

In case the OverlayScrollbarsComponent is not enough, you can also use the OverlayScrollbarsDirective directive:

import { OverlayScrollbarsDirective } from "overlayscrollbars-ngx";
<!-- example usage -->
<div overlayScrollbars></div>

The directive is for advanced usage and lets you control the whole initialization process. This is useful if you want to integrate it with other plugins.

Note: The directive won't initialize OverlayScrollbars on its own. You have to call the initialize function.

Properties

Properties are optional and similar to the OverlayScrollbarsComponent.

  • options: accepts an object which represents the OverlayScrollbars options.
  • events: accepts an object which represents the OverlayScrollbars events.
  • defer: accepts an boolean or object. Defers the initialization to a point in time when the browser is idle.

Instance

The OverlayScrollbarsDirective exposes two functions:

  • osInitialize takes one argument which is the InitializationTarget.
  • osInstance returns the current OverlayScrollbars instance or null if not initialized.

License

MIT