Snackbar

    The Ignite UI for Angular Snackbar component provides feedback about an operation with a single-line message, which can include an action. The Snackbar message appears above all other elements and is positioned at the bottom center of the screen.

    Angular Snackbar Example

    Usage

    The first step is to import the IgxSnackbarModule in our app.module.ts file:

    // app.module.ts
    
    ...
    import { IgxSnackbarModule } from 'igniteui-angular';
    
    @NgModule({
        ...
        imports: [..., IgxSnackbarModule],
        ...
    })
    export class AppModule {}
    

    Show Snackbar

    In order to display the snackbar component, use its open() method and call it on a button click.

    <!--sample.component.html-->
    
    <button igxButton="raised" (click)="snackbar.open()">Delete Message</button>
    <div>
        <igx-snackbar #snackbar>Message deleted</igx-snackbar>
    </div>
    

    If the sample is configured properly, you should see the demo sample. A snackbar appears displaying a text message when the button is clicked. As you can see in the code snippet above, one way to set the massage displayed in the snackbar is to use the content projection. But if you need to switch the value programmatically based on some custom logic you can just pass the value as a parameter to the open() method.

    <!--sample.component.html-->
    
    <button igxButton="raised" (click)="snackbar.open('Message deleted')">Delete Message</button>
    <button igxButton="raised" (click)="snackbar.open('Message deletion was not successful. Please try again')">Delete Message</button>
    <div>
        <igx-snackbar #snackbar></igx-snackbar>
    </div>
    

    Hide/Auto Hide

    Once opened, the snackbar disappears after a period specified by the displayTime input which is set initially to 4000 milliseconds. This behavior is enabled by default but you can change it by setting autoHide to false. In this way, the snackbar will remain visible. Using the snackbar close() method, you can close the component in the code.

    <!--sample.component.html-->
    
    <button igxButton="raised" (click)="snackbar.open()">Send message</button>
    <div>
      <igx-snackbar #snackbar [autoHide]="false" actionText="CLOSE" (clicked)="close(snackbar)">Message sent</igx-snackbar>
    </div>
    
    // sample.component.ts
    
    public close(element) {
        element.close();
    }
    

    If the sample is configured properly, the first snackbar appears when the button is clicked, showing both the message and action button. The auto-hide feature is disabled and the snackbar disappears on 'CLOSE' button click. Another snackbar passes a different message through the open() method and hides it when the display time expires. The third component passes a message as a param to the open() method and adds an icon using content projection.

    Display Time

    Use displayTime and set it to an interval in milliseconds to configure how long the snackbar component is visible. By default, as we said, it's initially set to 4000 miliseconds.

    Customize Snackbar

    We can also customize the content of the Snackbar to display more complex elements than a message and a button. If we want to show the snackbar while loading a file, for example, a loading animation could be added to its content.

    <!--sample.component.html-->
    <button igxButton="raised" (click)="snackbar.open()">Load file</button>
    <div>
      <igx-snackbar #snackbar displayTime="5000">File loading
        <svg id="dots" height="20px">
            <g id="dots" fill="#FFFFFF">
                <circle id="dot1" cx="5" cy="18" r="2"></circle>
                <circle id="dot2" cx="15" cy="18" r="2"></circle>
                <circle id="dot3" cx="25" cy="18" r="2"></circle>
            </g>
        </svg>
      </igx-snackbar>
    </div>
    
    //sample.component.scss
    #dots #dot1 {
        animation: load 1s infinite;
    }
    
    #dots #dot2 {
        animation: load 1s infinite;
        animation-delay: 0.2s;
    }
    
    #dots #dot3 {
        animation: load 1s infinite;
        animation-delay: 0.4s;
    }
    
    @keyframes load {
        0% {
          opacity: 0;
        }
        50% {
          opacity: 1;
        }
        100% {
          opacity: 0;
        }
    }
    

    As a result, a message and three loading dots appear in the snackbar.

    Snackbar in list

    Having all main snackbar features covered, we can integrate this component in a more interesting scenario. We can use the snackbar to provide a notification and the ability to revert actions.

    Let’s create a list with contacts that can be deleted. When an item is deleted, a snackbar is displayed containing a message and a button to undo the action.

    <!--sample.component.html-->
    <igx-list>
        <igx-list-item [isHeader]="true">Contacts</igx-list-item>
    
        <igx-list-item igxRipple="pink" igxRippleTarget=".igx-list__item" *ngFor="let item of navItems">
            <div class="item-container">
                <div class="contact">
                    <igx-avatar [src]="item.avatar" roundShape="true"></igx-avatar>
                    <div class="contact__info">
                        <span class="name">{{item.text}}</span>
                    </div>
                </div>
                <span igxButton="icon" igxRipple igxRippleCentered="true" (click)="delete(item)">
                    <igx-icon color="#ff5252">delete</igx-icon>
                </span>
            </div>
    
        </igx-list-item>
    
        <igx-snackbar actionText="Undo" (clicked)="restore()">Contact deleted</igx-snackbar>
    </igx-list>
    
    //sample.component.ts
    
    import { Component, OnInit, ViewChild } from "@angular/core";
    import { IgxSnackbarComponent } from 'igniteui-angular';
    
    ...
    @ViewChild(IgxSnackbarComponent)
    public snackbar: IgxSnackbarComponent;
    public navItems: any[];
    public deletedItems = [];
    
    constructor() { }
    
    public ngOnInit() {
        this.navItems = [{
            avatar: "assets/images/avatar/2.jpg",
            text: "Richard Mahoney"
        },
        {
            avatar: "assets/images/avatar/4.jpg",
            text: "Lisa Landers"
        },
        {
            avatar: "assets/images/avatar/14.jpg",
            text: "Marianne Taylor"
        },
        {
            avatar: "assets/images/avatar/17.jpg",
            text: "Ward Riley"
        }];
      }
    
    public delete(item) {
        this.deletedItems.push([item, this.navItems.indexOf(item)]);
        this.navItems.splice(this.navItems.indexOf(item), 1);
        this.snackbar.open();
    }
    
    public restore() {
        const [item, index] = this.deletedItems.pop();
        this.navItems.splice(index, 0, item);
        this.snackbar.close();
    }
    

    Overlay Settings

    The IgxSnackbarComponent uses Overlay Settings to control the position of its container. The default settings can be changed by defining Custom OverlaySettings and passing them to the snackbar open() method:

    public customSettings: OverlaySettings = {
        positionStrategy: new GlobalPositionStrategy(
            { 
                horizontalDirection: HorizontalAlignment.Left,
                verticalDirection: VerticalAlignment.Top
            }),
        modal: true,
        closeOnOutsideClick: true,
    };
    
    snackbar.open(customSettings);
    

    Users can also provide a specific outlet where the snackbar will be placed in the DOM when it is visible:

    <igx-snackbar [outlet]="igxBodyOverlayOutlet"></igx-snackbar>
    <div #igxBodyOverlayOutlet igxOverlayOutlet></div>
    

    Styling

    To get started with styling the snackbar, we need to import the index file, where all the theme functions and component mixins live:

    @import '~igniteui-angular/lib/core/styles/themes/index';
    

    Following the simplest approach, we create a new theme that extends the igx-snackbar-theme and accepts the $text-color, $background, $button-color and the $border-radius parameters.

    $dark-snackbar: igx-snackbar-theme(
        $text-color: #FFCD0F,
        $background: #292826,
        $button-color: #FFCD0F,
        $border-radius: 12px
    );
    

    Including themes

    The last step is to include the component theme in our application.

    If $legacy-support is set to true, include the component theme like that:

     @include igx-snackbar($igx-snackbar-theme);
    
    Note

    If the component is using an Emulated ViewEncapsulation, it is necessary to penetrate this encapsulation using ::ng-deep

    :host {
         ::ng-deep {
            @include igx-snackbar($igx-snackbar-theme);
        }
    }
    

    If $legacy-support is set to false(default), include the component css variables like that:

    @include igx-css-vars($igx-snackbar-theme);
    
    Note

    If the component is using an Emulated ViewEncapsulation, you still have to use :host because you need a global selector in order to override the variables.

    :host {
        @include igx-css-vars($igx-snackbar-theme);
    }
    

    Defining a color palette

    Instead of hardcoding the color values like we just did, we can achieve greater flexibility in terms of colors by using the igx-palette and igx-color functions.

    igx-palette generates a color palette based on the primary and secondary colors that are passed:

    $yellow-color: #FFCD0F;
    $black-color: #292826;
    
    $dark-palette: igx-palette($primary: $black-color, $secondary: $yellow-color);
    

    And then with igx-color we can easily retrieve color from the palette.

    $dark-snackbar: igx-snackbar-theme(
        $text-color: igx-color($dark-palette, "secondary", 400),
        $background: igx-color($dark-palette, "primary", 400),
        $button-color: igx-color($dark-palette, "secondary", 400),
        $border-radius: 12px
    );
    
    Note

    The igx-color and igx-palette are powerful functions for generating and retrieving colors. Please refer to Palettes topic for detailed guidance on how to use them.

    Using Schemas

    Going further with the theming engine, you can build a robust and flexible structure that benefits from schemas. A schema is a recipe of a theme.

    Extend one of the two predefined schemas, that are provided for every component, in this case - dark-snackbar schema:

    //  Extending the dark snackbar schema
    $dark-snackbar-schema: extend($_dark-snackbar,
        (
            text-color:(
                igx-color: ("secondary", 400)
            ),
            background: (
                igx-color: ("primary", 400)
            ),
            button-color: (
                igx-color: ("secondary", 400)
            ),
            border-radius: 12px
        )
    );
    

    In order to apply our custom schemas we have to extend one of the globals (light or dark), which is basically pointing out the components with a custom schema, and after that add it to the respective component themes:

    // Extending the global dark-schema
    $custom-dark-schema: extend($dark-schema,(
        igx-snackbar: $dark-snackbar-schema
    ));
    
    // Defining snackbar theme with the global dark schema
    $dark-snackbar: igx-snackbar-theme(
      $palette: $dark-palette,
      $schema: $custom-dark-schema
    );
    

    Don't forget to include the themes in the same way as it was demonstrated above.

    Demo

    API References

    In this article we learned how to use and configure the IgxSnackbarComponent. For more details in regards its API, take a look at the links below:

    Styles:

    Additional Resources

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