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ngx-drag-scroll

(★ 345)

A lightweight responsive Angular carousel library

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# [Angular Draggable Carousel](https://bfwg.github.io/ngx-drag-scroll/)

Lightweight drag to scroll carousel for Angular

## Maintainers wanted

[![npm version](https://img.shields.io/npm/v/ngx-drag-scroll.svg)](https://www.npmjs.com/package/ngx-drag-scroll)
[![Monthly Download](https://img.shields.io/npm/dm/ngx-drag-scroll.svg?style=flat-square)](https://www.npmjs.com/package/ngx-drag-scroll)
[![Build Status](https://travis-ci.org/bfwg/ngx-drag-scroll.svg?branch=master)](https://travis-ci.org/bfwg/ngx-drag-scroll)
[![License MIT](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/bfwg/ngx-drag-scroll/blob/master/LICENSE)

_Scroll on drag!_

![Scroll](https://user-images.githubusercontent.com/12819525/31459582-73565738-ae78-11e7-8b45-83f686123b63.gif)

Try out the [demo](https://bfwg.github.io/ngx-drag-scroll/)!

# Install

You can get it on npm.

```shell
npm install ngx-drag-scroll --save
```

## Requirements

This project needs `Angular 5+` as dependencies though.

# Setup

Our component and directive are standalone now!
You'll need to import `DragScrollComponent` and/or `DragScrollItemDirective` to your application module or component.

## Module:

```typescript
import { DragScrollComponent, DragScrollItemDirective } from 'ngx-drag-scroll';

...

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    DragScrollComponent,
    DragScrollItemDirective,
    ...
  ],
  providers: [],
  bootstrap: [ AppComponent ]
})

export class AppModule {
}

```

## Component:

```typescript
import { DragScrollComponent, DragScrollItemDirective } from 'ngx-drag-scroll';

@Component({
  selector: 'sample',
  template:`
  <drag-scroll>
    <img drag-scroll-item src="some-url" />
    <img drag-scroll-item src="some-url" />
    <img drag-scroll-item src="some-url" />
  </drag-scroll>
  `,
  standalone: true,
  imports: [
    DragScrollComponent,
    DragScrollItemDirective,
    ...
  ]
})
class Sample {}
```

Add the `drag-scroll` attribute to a scrollable element:

```typescript
@Component({
  selector: 'sample',
  template: ` <drag-scroll style="width: 100px; height: 10px"> Big text goes here... </drag-scroll> `,
  styles: [
    `
    drag-scroll {
      height: 50px
      width: 100px
    }
    `
  ]
})
class SampleBigText {}
```

That's it! Now you can scroll it by dragging.

If you want to group items into a carousel, you will need to add `drag-scroll-item` to the carsousel items.

```typescript
@Component({
  selector: 'sample',
  template: `
    <drag-scroll>
      <img drag-scroll-item src="some-url" />
      <img drag-scroll-item src="some-url" />
      <img drag-scroll-item src="some-url" />
    </drag-scroll>
  `,
  styles: [
    `
    drag-scroll {
      height: 50px
      width: 100px
    }
    img {
      height: 50px
      width: 50px
    }
    `
  ]
})
class SampleCarousel {}
```

## API REFERENCE

### DragScrollComponent

| Name                   | Type    | Description                                                          | Default |
| ---------------------- | ------- | -------------------------------------------------------------------- | ------- |
| scrollbar-hidden       | @Input  | Whether the scroll bar for this element is hidden.                   | false   |
| drag-scroll-disabled   | @Input  | Whether all draging and scrolling events is disabled.                | false   |
| drag-scroll-x-disabled | @Input  | Whether horizontally dragging and scrolling events is disabled.      | false   |
| scroll-x-wheel-enabled | @Input  | Whether scrolling horizontally with mouse wheel is enabled           | false   |
| drag-scroll-y-disabled | @Input  | Whether vertically dragging and scrolling events is disabled.        | false   |
| drag-disabled          | @Input  | Whether draging is disabled.                                         | false   |
| snap-disabled          | @Input  | Whether snapping is disabled.                                        | false   |
| snap-offset            | @Input  | Pixels of previous element to show on snap or moving left and right. | 0       |
| snap-duration          | @Input  | Duration of snap animation in milliseconds.                          | 500     |
| reachesLeftBound       | @Output | Whether reaching the left carousel bound.                            | n/a     |
| reachesRightBound      | @Output | Whether reaching the right carousel bound.                           | n/a     |
| dragStart              | @Output | Executes when drag start.                                            | n/a     |
| dragEnd                | @Output | Executes when drag end.                                              | n/a     |
| snapAnimationFinished  | @Output | The snap animation for the new selection has finished.               | n/a     |
| indexChanged           | @Output | Executes when the current index of the carousel changes.             | n/a     |
| dsInitialized          | @Output | Executes when the drag scroll component has been initialized.        | n/a     |

---

### DragScrollItemDirective

| Name          | Type   | Description                              | Default |
| ------------- | ------ | ---------------------------------------- | ------- |
| drag-disabled | @Input | Whether draging on the item is disabled. | false   |

---

## Add navigation button

```typescript
@Component({
  selector: 'sample',
  template: `
    <drag-scroll #nav>
      <img drag-scroll-item src="some-url" />
      <img drag-scroll-item src="some-url" />
      <img drag-scroll-item src="some-url" />
    </drag-scroll>
    <button (click)="moveLeft()">Left</button>
    <button (click)="moveRight()">Right</button>
    <button (click)="moveTo(2)">Last</button>
  `
})
class Sample {
  @ViewChild('nav', { read: DragScrollComponent }) ds: DragScrollComponent;

moveLeft() {
    this.ds.moveLeft();
  }

moveRight() {
    this.ds.moveRight();
  }

moveTo(index) {
    this.ds.moveTo(index);
  }

ngAfterViewInit() {
    // Starting ngx-drag-scroll from specified index(3)
    setTimeout(() => {
      this.ds.moveTo(3);
    }, 0);
  }
}
```

### Contributing

Clone the repository, and run `npm install`, `npm run build ngx-drag-scroll`, `npm start`. The demo app will starts on port :4200. I usually do my development on the demo app.

I'll accept pretty much everything so feel free to open a Pull-Request.

We use commitlint for managing our commits. Check out [Contributing](CONTRIBUTING.md) for more details.

# License

[MIT](/LICENSE)