Alert

@coinbase/cds-web@8.34.1

A dialog that communicates critical information and blocks user interaction.

Import

import { Alert } from '@coinbase/cds-web/overlays/Alert'

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Related components

• Modal

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View as Markdown

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Accessibility tip (Web only)

Alerts require an accessibility label, which we set to title by default. However, if there's other text that gives the user better context to the alert, then you can pass an element id to accessibilityLabelledBy. Alternatively, you may directly provide a contextual label to accessibilityLabel.

Default Alert

Controlled using visible and onRequestClose.

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Live Code

function DefaultAlertExample() {
  const [visible, setVisible] = useState(false);

  const toggleOn = () => setVisible(true);
  const toggleOff = () => setVisible(false);

  return (
    <PortalProvider>
      <ButtonGroup>
        <Button onClick={toggleOn}>Show Alert</Button>
      </ButtonGroup>
      <Alert
        title="Alert title"
        body="Alert body type that can run over multiple lines, but should be kept short."
        pictogram="warning"
        visible={visible}
        onRequestClose={toggleOff}
        preferredActionLabel="Primary"
        onPreferredActionPress={() => console.log('preferred pressed')}
        dismissActionLabel="Cancel"
        onDismissActionPress={() => console.log('dismiss pressed')}
      />
    </PortalProvider>
  );
}

Portal Alert

Controlled programmatically using the useAlert hook.

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Warning

Deprecated: Inserting JSX into the DOM using a function in an event handler is an anti-pattern. This hook will be removed in future version. Use the visible and onRequestClose props instead

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Live Code

function PortalAlertExample() {
  function PortalAlert() {
    const alert = useAlert();

    const showAlert = () =>
      alert.open(
        <Alert
          title="Alert title"
          body="Alert body type that can run over multiple lines, but should be kept short."
          pictogram="warning"
          visible
          onRequestClose={alert.close}
          preferredActionLabel="Save"
          onPreferredActionPress={() => console.log('Save pressed')}
        />,
      );

    return <Button onClick={showAlert}>Show Alert</Button>;
  }

  return (
    <PortalProvider>
      <PortalAlert />
    </PortalProvider>
  );
}

Alert over Modal

Alert displays on top of a Modal. You must pass stacked as a prop to Alert when it is used inside of a Modal.

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Live Code

function AlertOnModalExample() {
  function AlertOnModal() {
    const { openModal, closeModal } = useModal();
    const alert = useAlert();

    const showAlert = () =>
      alert.open(
        <Alert
          visible
          onRequestClose={alert.close}
          title="Are you sure?"
          body="Cancel will discard your existing changes, are you sure?"
          pictogram="warning"
          preferredActionLabel="Discard"
          onPreferredActionPress={closeModal}
          preferredActionVariant="negative"
          dismissActionLabel="Cancel"
          stacked
        />,
      );

    const handlePress = () => {
      openModal(
        <Modal visible onRequestClose={closeModal}>
          <ModalBody>
            <Text as="p" font="body">
              {loremIpsum}
            </Text>
          </ModalBody>
          <ModalFooter
            primaryAction={<Button onClick={closeModal}>Save</Button>}
            secondaryAction={<Button onClick={showAlert}>Cancel</Button>}
          />
        </Modal>,
      );
    };

    return <Button onClick={handlePress}>Open Modal</Button>;
  }

  return (
    <PortalProvider>
      <AlertOnModal />
    </PortalProvider>
  );
}