@rmwc/snackbar

Snackbars

Snackbars provide brief feedback about an operation through a message at the bottom of the screen.

• Module @rmwc/snackbar
• Import styles:
  • Using CSS Loader
    • import '@rmwc/snackbar/styles';
  • Or include stylesheets
    • '@material/snackbar/dist/mdc.snackbar.css'
    • '@material/button/dist/mdc.button.css'
    • '@material/ripple/dist/mdc.ripple.css'
• MDC Docs: https://material.io/develop/web/components/snackbars/

Basic Usage

You can render a snackbar in your UI and control its open state.

function Example() {
  const [open, setOpen] = React.useState(false);

  return (
    <>
      <Snackbar
        open={open}
        onClose={(evt) => setOpen(false)}
        message="This is a new message"
        dismissesOnAction
        action={
          <SnackbarAction
            label="Dismiss"
            onClick={() => console.log('Click Me')}
          />
        }
      />

      <Button
        raised
        label="Show snackbar"
        onClick={(evt) => setOpen(!open)}
      />
    </>
  );
}

function Example() {
  const [open, setOpen] = React.useState(false);

  return (
    <>
      <Snackbar
        open={open}
        onClose={(evt) => setOpen(false)}
        message="Start aligned, open until dismissed"
        stacked
        dismissesOnAction
        action={[
          <SnackbarAction label="Yeah!" />,
          <SnackbarAction label="No..." />
        ]}
        leading
        timeout={-1}
      />

      <Button
        raised
        label="Show start-aligned"
        onClick={(evt) => setOpen(!open)}
      />
    </>
  );
}

function Example() {
  const [open, setOpen] = React.useState(false);

  return (
    <>
      <Snackbar
        open={open}
        onClose={(evt) => setOpen(false)}
        message="This is a new message"
        dismissesOnAction
        dismissIcon="close"
        timeout={-1}
      />
      <Button
        raised
        label="Show snackbar"
        onClick={(evt) => setOpen(!open)}
      />
    </>
  );
}

Usage with SnackbarQueue

While rendering the Snackbar inline works for simple cases, you'll likely have a notification system, or want to send notifications from anywhere in your app. The SnackbarQueue exists as a convenient interface for handling these cases and rendering the snackbar messages for you. If you've used the DialogQueue, the SnackbarQueue is very similar.

Setup is nice and easy, create a queue object you can pass around in your code base, pass the queues messages to the SnackbarQueue component, and then use the notify function to send notifications.

  `
// Create a file that exports your queue
// myQueue.js
import { createSnackbarQueue } from '@rmwc/snackbar';

export const queue = createSnackbarQueue();

  `
// Somewhere at the top level of your app
// Render the SnackbarQueue
import React from 'react';
import { queue } from './myQueue';

export default function App() {
  return (
    <div>
      ...
      <SnackbarQueue
        messages={queue.messages}
        // You can also pass default options to pass to your notifications
        // ie, make them all leading, stacked, etc
        leading
        stacked
      />
    </div>
  )
}

The notify function was designed to mimic the the built-in browser Notifications api and can accept most of the relevant options (icon, image, title, body, actions, ,etc). It also can accept any of the Snackbar props. Just import your queue, and call the notify method.

  `
// Somewhere else in your app
// Could be a view, your redux store, anywhere you want...
import { queue } from './myQueue';

// Simple example
queue.notify({
  title: 'Hi there'
});

// With some features
queue.notify({
  title: <b>Warning</b>,
  body: 'You have selected pizza instead icecream!',
  icon: 'warning',
  actions: [
    {
      // NotificationAction api format
      title: 'Fix It!',
      icon: 'close',
      action: 'fixit' // action will be available as evt.detail.reason in the onClose event
    },
    {
      // OR SnackbarActionProps format
      label: 'Continue...',
      icon: 'check',
      onClick: () => {}
    },
  ]
});

() => {
  const { messages, notify } = createSnackbarQueue();

  function App() {
    return (
      <div>
        <Button
          label="Notify"
          onClick={() =>
            notify({
              title: <b>Success</b>,
              body: 'You have selected pizza!',
              dismissesOnAction: true,
              icon: 'check',
              actions: [
                {
                  title: 'Dismiss'
                }
              ]
            })
          }
        />
        <SnackbarQueue messages={messages} />
      </div>
    );
  }
  return <App />;
}

Snackbar

A Snackbar component for notifications.

Props

Name	Type	Description
action	ReactNode | ReactNode[]	One or more actions to add to the snackbar.
dismissIcon	IconPropT
dismissesOnAction	boolean	Whether or not your want clicking an action to close the Snackbar.
foundationRef	Ref<null | MDCSnackbarFoundation<>>	Advanced: A reference to the MDCFoundation.
icon	IconPropT	An icon for the snackbar
leading	boolean
message	ReactNode	A string or other renderable JSX to be used as the message body.
onClose	(evt: SnackbarOnCloseEventT) => void	A callback thats fired when the Snackbar hides. evt.detail = { reason?: string }
onOpen	(evt: SnackbarOnOpenEventT) => void	A callback thats fired when the Snackbar shows.
open	boolean	Show the Snackbar.
stacked	boolean	Places the action underneath the message text.
timeout	number	Milliseconds to show the Snackbar for. Set to -1 to show indefinitely.

SnackbarAction

A button for a snackbar action.

Props

Name	Type	Description
action	string	An action returned in evt.detail.reason to the onClose handler.
children	ReactNode	Content specified as children.
danger	boolean	Used to indicate a dangerous action.
dense	boolean	Make the Button dense.
disabled	boolean	Make the button disabled
icon	IconPropT	An Icon for the Button
label	any	Content specified as a label prop.
outlined	boolean	Make the button outlined.
raised	boolean	Make the Button raised.
ripple	RipplePropT	Adds a ripple effect to the component
touch	boolean	Makes the button more touch friendly. This will automatically be set true if used inside of TouchTargetWrapper.
trailingIcon	IconPropT	A trailing icon for the Button
unelevated	boolean	Make the button unelevated.