@niteshp/ngx-lightbox

Ngx-Lightbox

A lightbox2 implementation port to use with new Angular without the need for jQuery

Installation

npm install --save @niteshp/ngx-lightbox

Update your angular.json

{
  "styles": [
    "./node_modules/ngx-lightbox/lightbox.css",
    ...
  ],
}

Usage

Module:

Import LightboxModule from ngx-lightbox

import { LightboxModule } from 'ngx-lightbox';

@NgModule({
  imports: [ LightboxModule ]
})

Component

1. Markup

<div *ngFor="let image of _albums; let i=index">
  <img [src]="image.thumb" (click)="open(i)" />
</div>

2. Component method

import { Lightbox } from 'ngx-lightbox';

export class AppComponent {
  private _album: Array = [];
  constructor(private _lightbox: Lightbox) {
    for (let i = 1; i <= 4; i++) {
      const src = 'demo/img/image' + i + '.jpg';
      const caption = 'Image ' + i + ' caption here';
      const thumb = 'demo/img/image' + i + '-thumb.jpg';
      const album = {
         src: src,
         caption: caption,
         thumb: thumb
      };

      this._albums.push(album);
    }
  }

  open(index: number): void {
    // open lightbox
    this._lightbox.open(this._albums, index);
  }

  close(): void {
    // close lightbox programmatically
    this._lightbox.close();
  }
}

Each object of album array inside your component may contains 3 properties :

Properties	Requirement	Description
src	Required	The source image to your thumbnail that you want to with use lightbox when user click on thumbnail image
caption	Optional	Your caption corresponding with your image
thumb	Optional	Source of your thumbnail. It is being used inside your component markup so this properties depends on your naming.

3. Listen to lightbox event

You can listen to 3 events, which are either CHANGE_PAGE, CLOSE or OPEN.

import { LightboxEvent, LIGHTBOX_EVENT } from 'ngx-lightbox';
import { Subscription } from 'rxjs';

export class AppComponent {
  private _subscription: Subscription;
  constructor(private _lightboxEvent: LightboxEvent) {}
  open(index: number): void {
    // register your subscription and callback whe open lightbox is fired
    this._subscription = this._lightboxEvent.lightboxEvent$
      .subscribe(event => this._onReceivedEvent(event));
  }

  private _onReceivedEvent(event: any): void {
    // remember to unsubscribe the event when lightbox is closed
    if (event.id === LIGHTBOX_EVENT.CLOSE) {
      // event CLOSED is fired
      this._subscription.unsubscribe();
    }

    if (event.id === LIGHTBOX_EVENT.OPEN) {
      // event OPEN is fired
    }

    if (event.id === LIGHTBOX_EVENT.CHANGE_PAGE) {
      // event change page is fired
      console.log(event.data); // -> image index that lightbox is switched to
    }
  }
}

Lightbox options

Available options based on lightbox2 options

Properties	Default	Description
fadeDuration	0.7 seconds	duration starting when the src image is loaded to fully appear onto screen.
resizeDuration	0.5 seconds	duration starting when Lightbox container change its dimension from a default/previous image to the current image when the current image is loaded.
fitImageInViewPort	true	Determine whether lightbox will use the natural image width/height or change the image width/height to fit the view of current window. Change this option to true to prevent problem when image too big compare to browser windows.
positionFromTop	20 px	The position of lightbox from the top of window browser
showImageNumberLabel	false	Determine whether to show the image number to user. The default text shown is Image IMAGE_NUMBER of ALBUM_LENGTH
alwaysShowNavOnTouchDevices	false	Determine whether to show left/right arrow to user on Touch devices.
wrapAround	false	Determine whether to move to the start of the album when user reaches the end of album and vice versa. Set it to true to enable this feature.
disableKeyboardNav	false	Determine whether to disable navigation using keyboard event.
disableScrolling	false	If true, prevent the page from scrolling while Lightbox is open. This works by settings overflow hidden on the body.
centerVertically	false	If true, images will be centered vertically to the screen.
albumLabel	"Image %1 of %2"	The text displayed below the caption when viewing an image set. The default text shows the current image number and the total number of images in the set.
enableTransition	true	Transition animation between images will be disabled if this flag set to false
showZoom	false	Zoom Buttons will be shown if this flag set to true
showRotate	false	Rotate Buttons will be shown if this flag set to true
containerElementResolver	() => document.body	Resolves the element that will contain the lightbox

NOTE: You can either override default config or during a specific opening window

1. Override default config

import { LightboxConfig } from 'ngx-lightbox';

export class AppComponent {
  constructor(private _lightboxConfig: LightboxConfig) {
    // override default config
    _lightboxConfig.fadeDuration = 1;
  }
}

2. Set config in a specific opening window

import { LightboxConfig, Lightbox } from 'ngx-lightbox';

export class AppComponent {
  constructor(private _lightboxConfig: LightboxConfig, private _lightbox: Lightbox) {}
  open(index: number) {
    // override the default config on second parameter
    this._lightbox.open(this._albums, index, { wrapAround: true, showImageNumberLabel: true });
  }
}

Overriding lightbox parent elements

If you want to use any other parent element than your <body>, please override the containerElementResolver property of your LightboxConfig. This can be used, e.g. if you are opening the lightbox from within a Shadow DOM based web component.

export class MyLightBoxTrigger {
  constructor(
    private _lightbox: Lightbox,
    private _lighboxConfig: LightboxConfig,
  ) {
    _lighboxConfig.containerElementResolver = (doc: Document) => doc.getElementById('my-lightbox-host');
  }

  open(index: number): void {
    this._lightbox.open(this.images, index); // will put the lightbox child into e.g. <div id="my-lightbox-host"></div>
  }

Angular Universal

For this to work with Angular Universal, you need to have a global window object defined in your server.js (the one in your Angular project derived from initiating an ssr project using Angular Universal) using any window npm lib like window or domino

Add the below to your server.js

global["window"] = window;

License

MIT