React Native Embedding

Komo cards can be embedded into your React Native application through Komo’s NPM package @komo-tech/react-native-widgets .

Installation


npm install @komo-tech/react-native-widgets

NOTE: @komo-tech/react-native-widgets has a peer dependency on react-native-webview , and recommends the latest major version, 13.x.

Basic Usage

The quickest way to get started with embedding Komo content in react native is by using the KomoCardWidget component.
This component combines metadata fetching, card cover display, and modal handling for the card experience.
The only required prop is embedMetaUrl. To find this in the Komo portal:
- Navigate to the settings of the card to be embedded.
- Select the Embed tab and click on React Native code in the right sidebar.
- Copy the Card embed meta URL and use it as the value of the embedMetaUrl prop.


import { KomoCardWidget } from '@komo-tech/react-native-widgets';
 
// ...
 
<KomoCardWidget
  embedMetaUrl={KomoCardNativeEmbedUrl}
  containerStyle={{ maxWidth: '80%' }}
/>;

Prefilling form details

You can pass information through to the Komo experience that will be pre-filled in any forms that the user may encounter.
Pass a plain Record<string,string> object of keys and values through to the formPrefillValues prop on KomoCardWidget or ExperienceModal.
The object keys must match the Unique ID of the form field or contact property from the Komo Platform that you want to prefill.


<KomoCardWidget
  embedMetaUrl={KomoCardNativeEmbedUrl}
  containerStyle={{ maxWidth: '80%' }}
  formPrefillValues={{
    email: 'email@domain.com',
    first_name: 'Person',
    last_name: 'Doe'
  }}
/>

Advanced usage

Metadata fetching

The first step to using embedded Komo content involves fetching the card metadata.
Use the useFetchCardMetadata hook and the Native embed URL copied from the platform to fetch the CardEmbedMetadata.
The CardEmbedMetadata has the information required to render the cover image (imageUrl) and the URL (embedUrl) that the ExperienceModal needs to render the embedded experience.
Note: you can use your own data-fetching patterns if you require more advanced data fetching handling. So long as it produces a CardEmbedMetadata, you can pass that to the other components that you want to use.


import { useFetchCardMetadata } from '@komo-tech/react-native-widgets';
 
// ... rest of your component
 
const { data, isLoading, isError } = useFetchCardMetadata({
  embedMetaUrl: KomoCardNativeEmbedUrl
});
 
// ... use the data.

Render a Card Cover

The CardCover component is used to display the cover image of a Komo card.
It handles loading states, error states, and button display.
The component requires an onClick handler and isLoading state.
The imageUrl and imageAspectRatio props are typically obtained from the CardEmbedMetadata.


import { CardCover } from '@komo-tech/react-native-widgets';
 
// ... rest of your component
 
<CardCover
  imageUrl={metadata?.imageUrl}
  imageAspectRatio={metadata?.imageAspectRatio}
  isLoading={isLoading}
  isError={isError}
  onClick={() => doSomethingOnCoverClicked()}
  metaButtonStyle={metadata?.buttonStyle}
  containerStyle={{ borderRadius: 8 }}
/>;

The ExperienceModal component is used to display the full Komo experience in a modal overlay.
It handles loading states, error states, and communication with the embedded experience.
The component requires an isOpen state and onClose handler.
A valid embedUrl prop is required for the experience modal to function, and this is typically obtained from the CardEmbedMetadata.
If you have forced OAuth enabled, you also need to pass through the embedAuthUrl from CardEmbedMetadata.


import { ExperienceModal } from '@komo-tech/react-native-widgets';
 
// ... rest of your component
 
<ExperienceModal
  isOpen={isModalOpen}
  onClose={() => setIsModalOpen(false)}
  embedUrl={metadata?.embedUrl}
  embedAuthUrl={metadata?.embedAuthUrl}
  loadingTimeoutMs={15000} // Optional: customize loading timeout
  appId="my-app" // Optional: identify where the content is embedded
/>;

You can use whichever components you want to build your desired experience.
For example, you can trigger the ExperienceModal without rendering our CardCover.


// ... rest of your component
const { data, isLoading } = useFetchCardMetadata({
  isEnabled,
  embedMetaUrl: EmbedMetaUrlFromKomoPortal
});
const [modalOpen, setModalOpen] = useState(false);
 
// other code, e.g. some element that calls setModalOpen(true) after isLoading returns false
 
<ExperienceModal
  isOpen={modalOpen}
  onClose={() => {
    setModalOpen(false);
  }}
  embedUrl={data?.embedUrl}
/>;

Listening for events from the embedded experience

You can listen for events from the embedded experience by using the onWindowMessage or onKomoEvent props on the ExperienceModal or KomoCardWidget.
The onWindowMessage prop exposes any window.postMessage events from the embedded experience.
The onKomoEvent prop exposes any User Interaction Events from the embedded experience.
- Note: User Interaction Events will also appear in the onWindowMessage callback. onKomoEvent is a more convenient way to listen for Komo User Interaction Events from the embedded experience.


<ExperienceModal
  isOpen={modalOpen}
  onClose={() => {
    setModalOpen(false);
  }}
  embedUrl={data?.embedUrl}
  onKomoEvent={(event) => {
    console.log('Komo event received:', event);
  }}
  onWindowMessage={(event) => {
    console.log('Window message received:', event);
  }}
/>

Extension Data

The ExperienceModal and KomoCardWidget components allow you to set extension data on the user interaction events.
The extensionDataValues prop is a plain Record<string, string | number | boolean | object> object.
Make sure PII is not passed in as extension data, as it is passed directly to your tag manager integrations.


<KomoCardWidget
  embedMetaUrl={KomoCardNativeEmbedUrl}
  extensionDataValues={{
    custom_unique_id: 'ABC123',
    custom_object: {
      some_id: 'ABC123',
      some_measure: 123456
    }
  }}
/>

Query Parameters

Pass custom query parameters (like UTM tracking parameters) to your embedded experiences. This is useful for campaign attribution, A/B testing, and analytics tracking.

Basic Usage


import { KomoCardWidget } from '@komo-tech/react-native-widgets';
 
<KomoCardWidget
  embedMetaUrl={KomoCardNativeEmbedUrl}
  queryParams={{
    utm_source: 'mobile-app',
    utm_medium: 'widget',
    utm_campaign: 'summer-2024',
    utm_content: 'hero-banner'
  }}
/>

UTM Tracking Example


<KomoCardWidget
  embedMetaUrl={embedUrl}
  queryParams={{
    utm_source: 'instagram',
    utm_medium: 'social',
    utm_campaign: 'product-launch',
    utm_term: 'keyword',
    utm_content: 'story-swipe-up'
  }}
/>

Dynamic Campaign Tracking


import { KomoCardWidget } from '@komo-tech/react-native-widgets';
import { useRoute } from '@react-navigation/native';
 
function CampaignScreen() {
  const route = useRoute();
  const { campaignId, source } = route.params;
 
  return (
    <KomoCardWidget
      embedMetaUrl={embedUrl}
      queryParams={{
        utm_campaign: campaignId,
        utm_source: source,
        utm_medium: 'app'
      }}
    />
  );
}

User Segment Tracking


import { KomoCardWidget } from '@komo-tech/react-native-widgets';
import { useUser } from './hooks/useUser';
 
function ContestScreen() {
  const { userSegment, subscriptionTier } = useUser();
 
  return (
    <KomoCardWidget
      embedMetaUrl={embedUrl}
      queryParams={{
        utm_source: 'app',
        utm_content: userSegment,
        user_tier: subscriptionTier
      }}
    />
  );
}

Combining with Other Props

Query parameters work alongside form prefill and extension data:


<KomoCardWidget
  embedMetaUrl={embedUrl}
  // Prefill form fields
  formPrefillValues={{
    email: user.email,
    first_name: user.firstName
  }}
  // Add analytics data
  extensionDataValues={{
    user_id: user.id,
    account_type: user.accountType
  }}
  // Track campaign source
  queryParams={{
    utm_source: 'app',
    utm_medium: 'home-screen',
    utm_campaign: 'welcome-flow'
  }}
/>

Using with ExperienceModal

The ExperienceModal component also supports queryParams:


import { ExperienceModal } from '@komo-tech/react-native-widgets';
import { useState } from 'react';
import { Button } from 'react-native';
 
function CustomModal() {
  const [isOpen, setIsOpen] = useState(false);
 
  return (
    <>
      <Button title="Open Contest" onPress={() => setIsOpen(true)} />
 
      <ExperienceModal
        isOpen={isOpen}
        onClose={() => setIsOpen(false)}
        embedUrl={metadata?.embedUrl}
        queryParams={{
          utm_source: 'custom-modal',
          utm_medium: 'app'
        }}
      />
    </>
  );
}

Deep Link Attribution

Track users coming from deep links:


import { useEffect, useState } from 'react';
import { Linking } from 'react-native';
import { KomoCardWidget } from '@komo-tech/react-native-widgets';
 
function DeepLinkScreen() {
  const [queryParams, setQueryParams] = useState({});
 
  useEffect(() => {
    // Parse deep link URL parameters
    Linking.getInitialURL().then((url) => {
      if (url) {
        const urlObj = new URL(url);
        const params = {};
        urlObj.searchParams.forEach((value, key) => {
          params[key] = value;
        });
        setQueryParams(params);
      }
    });
  }, []);
 
  return (
    <KomoCardWidget
      embedMetaUrl={embedUrl}
      queryParams={{
        ...queryParams,
        utm_source: 'deep-link'
      }}
    />
  );
}

Multi-Platform Tracking

Detect and track the platform:


import { Platform } from 'react-native';
import { KomoCardWidget } from '@komo-tech/react-native-widgets';
 
<KomoCardWidget
  embedMetaUrl={embedUrl}
  queryParams={{
    utm_source: 'react-native',
    utm_medium: 'app',
    platform: Platform.OS, // 'ios' or 'android'
    app_version: DeviceInfo.getVersion()
  }}
/>

Technical Details

Query parameters are added directly to the webview URL (no prefix)
All values must be strings
Parameters are available to analytics tools in the embedded experience
Can be combined with formPrefillValues and extensionDataValues
Supports standard UTM parameters and custom parameters

Auth0 Session Transfer

The KomoCardWidget component supports Auth0 authentication through the authPassthroughParams prop.
The ExperienceModal component supports Auth0 authentication through the embedAuthUrl and authPassthroughParams props.
- The embedAuthUrl is typically obtained from the CardEmbedMetadata.
Pre-requisites:
- Auth0 SSO must be configured on the Komo Hub, and “Force Embed Auth” must be enabled under Embed SDK settings on the hub.
- Pass a fresh session transfer token to the authPassthroughParams prop, e.g. session_transfer_token: 'ABC123'.
With this setup, the user will be redirected to Auth0 to authenticate when the experience modal is opened, before being redirected back to the embedded experience.
The session transfer token must be obtained immediately before opening the experience modal, since it has a short 60 second lifespan.
Recommended: Specify webViewProps={{ incognito: true }} to ensure user session state is cleared correctly when changing between different authenticated users.


<KomoCardWidget
    embedMetaUrl={KomoCardNativeEmbedUrl}
    authPassthroughParams={new URLSearchParams({
        session_transfer_token: 'ABC123'
    })}
    webViewProps={{ incognito: true }}
/>
 
// or if using the ExperienceModal directly
<ExperienceModal
    isOpen={isModalOpen}
    onClose={() => setIsModalOpen(false)}
    embedUrl={metadata?.embedUrl}
    embedAuthUrl={metadata?.embedAuthUrl}
    authPassthroughParams={new URLSearchParams({
        session_transfer_token: 'ABC123'
    })}
    webViewProps={{ incognito: true }}
/>

Error handling

If the session_transfer_token passed to Auth0 is used, invalid, or expired, then the users will end up being shown the ExperienceModal errorDisplay, which includes a built-in retry button.
If you don’t provide an errorDisplay override, the retry function will just attempt to reload the experience with the current parameters and will most likely fail again.
We recommend that you provide a custom errorDisplay so that you can handle session_transfer_token regeneration before trying to load the content again.

API Reference

ButtonStyle

Name	Type	Description	Required
text	string?	Text to display on the button	Optional
backgroundColor	string?	Background color of the button	Optional
color	string?	Text color of the button	Optional

CardCover Props

Name	Type	Description	Required
onClick	() => void	The callback for when the cover is clicked	Required
isLoading	boolean	Whether the cover is loading	Required
isError	boolean?	Whether the cover is in an error state	Optional
loader	ReactNode?	Override the default skeleton loader	Optional
errorDisplay	ReactNode?	Override the default error display	Optional
metaButtonStyle	ButtonStyle?	The button style returned from the embed metadata endpoint	Optional
overrideButtonStyle	StyleProp<ViewStyle>?	Override the button style	Optional
overrideButtonTextStyle	StyleProp<TextStyle>?	Override the button text style	Optional
containerStyle	StyleProp<ViewStyle>?	Override the container style	Optional
coverImageStyle	StyleProp<ImageStyle>?	Override the cover image style	Optional
hideCoverButton	boolean?	Whether to hide the cover button	Optional
imageUrl	string?	The url of the cover image	Optional
imageAspectRatio	number?	The aspect ratio of the cover image	Optional

CardEmbedMetadata

Name	Type	Description	Required
title	string?	The title of the card	Optional
imageUrl	string?	URL of the card's cover image	Optional
imageHeight	number?	Height of the cover image in pixels	Optional
imageWidth	number?	Width of the cover image in pixels	Optional
imageAspectRatio	number?	Aspect ratio of the cover image	Optional
embedUrl	string?	URL for the embedded experience	Optional
embedAuthUrl	string?	URL used to OAuth user before showing the embedded experience	Optional
buttonStyle	ButtonStyle?	Styling for the card's button	Optional

ExperienceModal Props

Name	Type	Description	Required
isOpen	boolean	Whether the modal is open	Required
onClose	() => void	Callback for when close is requested	Required
embedUrl	string	The URL of the embedded card experience	Required
modalHeader	ReactNode	Override the default modal header	Optional
shareClickUrl	string	Override the url that redirects a user when clicking on a share link	Optional
appId	string	An identifier for the embedded Komo content	Optional
formPrefillValues	Record<string, string>	Prefill values for the form within the experience	Optional
extensionDataValues	Record<string, string \| number \| boolean \| object>	Extension data values for the experience	Optional
loadingIndicator	ReactNode	Override the default loading indicator	Optional
modalProps	ModalProps	Override the default modal props	Optional
loadingTimeoutMs	number	Timeout in milliseconds before showing error state. Defaults to 15000ms	Optional
errorDisplay	({ onRetry }: { onRetry: () => void }) => ReactNode	Override the default error display	Optional
onFileDownload	WebViewProps["onFileDownload"]	Callback for when a file download is requested. Only applies to iOS. See react-native-webview docs for more details	Optional
onKomoEvent	(event: KomoEvent) => void	Callback for when a Komo event is raised in the embedded experience	Optional
onWindowMessage	(event: any) => void	Callback for when a window message is raised in the embedded experience	Optional
embedAuthUrl	string?	The URL of the authorization endpoint. If provided, the experience modal will first load the auth URL, then redirect to the embed URL.	Optional
authPassthroughParams	URLSearchParams	Passthrough parameters to add to the auth URL as query parameters. For example, an Auth0 session transfer token can be added to the auth URL.	Optional
webViewProps	WebViewProps	Additional props for the react-native-webview component. Only applies if the platform is not web.	Optional
iframeProps	IframeProps	Additional props for the iframe component. Only applies if the platform is web.	Optional

KomoCardWidget Props

Name	Type	Description	Required
embedMetaUrl	String	The native embed url taken from the Komo portal settings of the card to be embedded	Required
appId	String	Useful for the embedded Komo content to identify where it's being embedded	Optional
containerStyle	StyleProp<ViewStyle>	Style overrides for the container of the card cover (including both image and CTA button)	Optional
coverImageStyle	StyleProp<ImageStyle>	Style overrides for the image of the card cover	Optional
buttonStyle	StyleProp<ViewStyle>	Style overrides for the CTA button of the card cover	Optional
buttonTextStyle	StyleProp<TextStyle>	Style overrides for the CTA button text of the card cover	Optional
coverLoader	ReactNode	The loader shown while the cover is loading (defaults to a skeleton card loader)	Optional
coverErrorDisplay	ReactNode	Override the default error display for the cover	Optional
hideCoverButton	Boolean	Hide the CTA button of the cover	Optional
modalHeader	ReactNode	The header of the modal to render instead of the default	Optional
onError	(error) => void	Callback for when an error occurs during querying the embed metadata endpoint	Optional
onModalClose	() => void	Callback on modal close	Optional
onModalOpen	() => void	Callback on modal open	Optional
shareClickUrl	String	Override of the url that redirects a user when clicking on a share link	Optional
formPrefillValues	Record<string, string>	Prefill values for the form within the experience	Optional
extensionDataValues	Record<string, string \| number \| boolean \| object>	Extension data values for the experience	Optional
onFileDownload	WebViewProps["onFileDownload"]	Callback for when a file download is requested. Only applies to iOS. See react-native-webview docs for more details	Optional
onKomoEvent	(event: KomoEvent) => void	Callback for when a Komo event is raised in the embedded experience	Optional
onWindowMessage	(event: any) => void	Callback for when a window message is raised in the embedded experience	Optional
authPassthroughParams	URLSearchParams	Passthrough parameters to add to the auth URL as query parameters. For example, an Auth0 session transfer token can be added to the auth URL.	Optional
loadingTimeoutMs	number	Timeout in milliseconds before showing error state in the modal. Defaults to 15000ms	Optional
modalErrorDisplay	({ onRetry }: { onRetry: () => void }) => ReactNode	Override the default error display for the modal	Optional
webViewProps	WebViewProps	Additional props for the react-native-webview component. Only applies if the platform is not web.	Optional
iframeProps	IframeProps	Additional props for the iframe component. Only applies if the platform is web.	Optional

KomoEvent

Name	Type	Description	Required
eventName	string	The name of the event	Required
eventData	any	Object containing the event data	Required
extensionData	Record<string, string \| number \| boolean \| object>	Extension data raised along with the event	Required

useFetchCardMetadata Hook

Options

Name	Type	Description	Required
embedMetaUrl	string	The URL of the embed metadata for the card, copied from the Komo Portal	Required
isEnabled	boolean	Whether the embed metadata query is enabled. Defaults to true	Optional
onError	(e: any) => void	Callback for when an error occurs during querying the embed metadata endpoint	Optional

Result

Name	Type	Description	Required
data	CardEmbedMetadata?	The embed metadata for the card	Optional
isLoading	boolean	Whether the embed metadata is loading	Required
isError	boolean	Whether the embed metadata query failed	Required
isSuccess	boolean	Whether the embed metadata query succeeded	Required
refetchAsync	() => Promise<void>	Function to refetch the embed metadata	Required

React Native Embedding

Installation

Basic Usage

Prefilling form details

Advanced usage

Metadata fetching

Render a Card Cover

Using the Experience Modal

Experience Modal example without Card Cover

Listening for events from the embedded experience

Extension Data

Query Parameters

Basic Usage

UTM Tracking Example

Dynamic Campaign Tracking

User Segment Tracking

Combining with Other Props

Using with ExperienceModal

Deep Link Attribution

Multi-Platform Tracking

Technical Details

Auth0 Session Transfer

Error handling

API Reference

ButtonStyle

CardCover Props

CardEmbedMetadata

ExperienceModal Props

KomoCardWidget Props

KomoEvent

useFetchCardMetadata Hook

Options

Result