@nicky-lenaers/ngx-scroll-to
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    9.0.0 • Public • Published

    ngx-scroll-to

    A simple Angular 4+ plugin enabling you to smooth scroll to any element on your page and enhance scroll-based features in your app. Works for Angular 4+, both AoT and SSR. No dependencies.

    Support for Angular 9!

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    License MIT License

    Current Angular Version

    npm version

    Installation

    Angular 8 and 9

    $ npm install @nicky-lenaers/ngx-scroll-to

    Angular 7

    $ npm install @nicky-lenaers/ngx-scroll-to@'2'

    Angular 6

    $ npm install @nicky-lenaers/ngx-scroll-to@'1'

    Angular <= 5.x

    $ npm install @nicky-lenaers/ngx-scroll-to@'<1'

    Setup

    ...
    import { ScrollToModule } from '@nicky-lenaers/ngx-scroll-to';
    ...
     
    @NgModule({
      imports: [
        ...
        ScrollToModule.forRoot()
      ],
      ...
      bootstrap[AppComponent]
    })
    export class AppModule { }

    Basic Usage - Directive to Target

    my.component.html

    <!-- Works for including '#' -->
    <button [ngxScrollTo]="'#destination'">Go to destination</button>
     
    <!-- Works for excluding '#' -->
    <button [ngxScrollTo]="'destination'">Go to destination</button>
     
    <!-- Works for Angular ElementRef -->
    <button [ngxScrollTo]="destinationRef">Go to destination</button>
     
    <div id="destination" #destinationRef>
      You've reached your destination.
    </div>

    Basic Usage - Directive to Offset Only

    Besides scrolling to a specific element, it is also possible to scroll a given offset only. This can be achieved by an empty target and an offset:

    my.component.html

    <button 
      ngxScrollTo
      [ngxScrollToOffset]="200">
      Go down 200 pixels
    </button>

    Basic Usage - Service to Target

    my.component.html

    <button (click)="triggerScrollTo()">Go to destination</button>
     
    <div id="destination">
      You've reached your destination.
    </div>

    my.service.ts

    import { Injectable } from '@angular/core';
    import { ScrollToService, ScrollToConfigOptions } from '@nicky-lenaers/ngx-scroll-to';
     
    @Injectable()
    export class MyService {
     
      constructor(private scrollToService: ScrollToService) { }
     
      triggerScrollTo() {
        
        const config: ScrollToConfigOptions = {
          target: 'destination'
        };
     
        this.scrollToService.scrollTo(config);
      }
    }

    Basic Usage - Service to Offset Only

    Just like with the Directive, the Service can be used to scroll to an offset only instead of a given target element:

    my.component.html

    <button (click)="triggerScrollToOffsetOnly(200)">Go down 200 pixels</button>

    my.service.ts

    import { Injectable } from '@angular/core';
    import { ScrollToService, ScrollToConfigOptions } from '@nicky-lenaers/ngx-scroll-to';
     
    @Injectable()
    export class MyService {
     
      constructor(private scrollToService: ScrollToService) { }
     
      triggerScrollToOffsetOnly(offset: number = 0) {
        
        const config: ScrollToConfigOptions = {
          offset 
        };
     
        this.scrollToService.scrollTo(config);
      }
    }

    Advanced Usage - Directive

    my.component.ts

    import { ScrollToAnimationEasing, ScrollToEvent, ScrollToOffsetMap } from '@nicky-lenaers/ngx-scroll-to';
     
    @Component({
      selector: 'my-component',
      templateUrl: './my.component.html'
    })
    export class MyComponent {
     
      ngxScrollToDestination: string;
      ngxScrollToEvent: ScrollToEvent;
      ngxScrollToDuration: number;
      ngxScrollToEasing: ScrollToAnimationEasing;
      ngxScrollToOffset: number;
      ngxScrollToOffsetMap: ScrollToOffsetMap;
     
      constructor() {
     
        this.ngxScrollToDestination = 'destination-1';
        this.ngxScrollToEvent = 'mouseenter';
        this.ngxScrollToDuration = 1500;
        this.ngxScrollToEasing = 'easeOutElastic';
        this.ngxScrollToOffset = 300;
        this.ngxScrollToOffsetMap = new Map();
        this.ngxScrollToOffsetMap
          .set(480, 100)
          .set(768, 200)
          .set(1240, 300)
          .set(1920, 400)
     
      }
     
      toggleDestination() {
        this.ngxScrollToDestination = this.ngxScrollToDestination === 'destination-1' ? 'destination-2' : 'destination-1';
      }
    }

    my.component.html

    <button (click)="toggleDestination()">Toggle Destination</button>
     
    <button 
      [ngxScrollTo]="ngxScrollToDestination"
      [ngxScrollToEvent]="ngxScrollToEvent"
      [ngxScrollToDuration]="ngxScrollToDuration"
      [ngxScrollToEasing]="ngxScrollToEasing"
      [ngxScrollToOffset]="ngxScrollToOffset"
      [ngxScrollToOffsetMap]="ngxScrollToOffsetMap">
      Go to destination
    </button>
     
    <div id="destination-1">
      You've reached your first destination
    </div>
     
    <div id="destination-2">
      You've reached your second destination
    </div>

    Advanced Usage - Service

    my.component.html

    <button (click)="triggerScrollTo()">Go to destination</button>
     
    <div id="custom-container">
      <div id="destination">
        You've reached your destination.
      </div>
    </div>

    my.service.ts

    import { Injectable } from '@angular/core';
    import { ScrollToService, ScrollToConfigOptions } from '@nicky-lenaers/ngx-scroll-to';
     
    @Injectable()
    export class MyService {
     
      constructor(private scrollToService: ScrollToService) { }
     
      triggerScrollTo() {
        
        /**
         * @see NOTE:1
         */
        const config: ScrollToConfigOptions = {
          container: 'custom-container',
          target: 'destination',
          duration: 650,
          easing: 'easeOutElastic',
          offset: 20
        };
     
        this.scrollToService.scrollTo(config);
      }
    }

    NOTE:1

    The container property is an optional property. By default, ngxScrollTo searches for the first scrollable parent HTMLElement with respect to the specified target. This should suffice in most cases. However, if multiple scrollable parents reside in the DOM tree, you have the degree of freedom the specify a specific container by using the container property, as used in the above example.

    Directive Attributes Map

    Options Type Default
    ngxScrollTo string | number | ElementRef | HTMLElement ''
    ngxScrollToEvent ScrollToEvent click
    ngxScrollToDuration number 650
    ngxScrollToEasing ScrollToAnimationEasing easeInOutQuad
    ngxScrollToOffset number 0
    ngxScrollToOffsetMap ScrollToOffsetMap new Map()

    Error Handling

    In some occasions, one might misspell a target or container selector string. Even though ngx-scoll-to will not be able to initiate the scrolling animation, you can catch the internally generated error and handle it as you please on the Observable chain returned from the scrollTo method.

    faulty.service.ts

    import { Injectable } from '@angular/core';
    import { ScrollToService } from '@nicky-lenaers/ngx-scroll-to';
     
    @Injectable()
    export class FaultyService {
     
      constructor(private scrollToService: ScrollToService) { }
     
      triggerScrollTo() {
        
        this.scrollToService
          .scrollTo({
            target: 'faulty-id'
          })
          .subscribe(
            value => { console.log(value) },
            err => console.error(err) // Error is caught and logged instead of thrown
          );
      }
    }

    Directive Attribute Map Details

    [ngxScrollTo]

    This value specifies the ID of the HTML Element to scroll to. Note the outer double quotes "" and the inner single quotes '' in the above example(s). This enables you to dynamically set the string value based on a class property of your Component.

    [ngxScrollToEvent]

    This value controls to event on which to trigger the scroll animation. Allowed values are:

    • click
    • mouseenter
    • mouseover
    • mousedown
    • mouseup
    • dblclick
    • contextmenu
    • wheel
    • mouseleave
    • mouseout

    [ngxScrollToDuration]

    This value controls to duration of your scroll animation. Note that this value is in milliseconds.

    [ngxScrollToEasing]

    This value controls a named easing logic function to control your animation easing. Allowed values are:

    • easeInQuad
    • easeOutQuad
    • easeInOutQuad
    • easeInCubic
    • easeOutCubic
    • easeInOutCubic
    • easeInQuart
    • easeOutQuart
    • easeInOutQuart
    • easeInQuint
    • easeOutQuint
    • easeInOutQuint
    • easeOutElastic

    [ngxScrollToOffset]

    This value controls the offset with respect to the top of the destination HTML element. Note that this value is in pixels.

    [ngxScrollToOffsetMap]

    This value allows you to control dynamic offsets based on the width of the device screen. The Map get's iterated over internally in a sequential fashion, meaning you need to supply key values in the order from low to high. The key of the Map defines the width treshold. The value of the Map defines the offset. Note that this value is in pixels.

    Contributing

    Please see Contributing Guidelines.

    Code of Conduct

    Please see Code of Conduct.

    License

    MIT

    Install

    npm i @nicky-lenaers/ngx-scroll-to

    DownloadsWeekly Downloads

    16,759

    Version

    9.0.0

    License

    MIT

    Unpacked Size

    444 kB

    Total Files

    50

    Last publish

    Collaborators

    • nicky-lenaers
    • rafa-as