Passing parameters to routes

Remember when I said "more on that later when we talk about params!"? Well, the time has come.

Now that we know how to create a stack navigator with some routes and navigate between those routes, let's look at how we can pass data to routes when we navigate to them.

There are two pieces to this:

1. Pass params to a route by putting them in an object as a second parameter to the navigation.navigate function: navigation.navigate('RouteName', { /* params go here */ })

2. Read the params in your screen component: route.params.

note

We recommend that the params you pass are JSON-serializable. That way, you'll be able to use state persistence and your screen components will have the right contract for implementing deep linking.

function HomeScreen({ navigation }) {
  return (
    <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>
      <Text>Home Screen</Text>
      <Button
        title="Go to Details"
        onPress={() => {
          /* 1. Navigate to the Details route with params */
          navigation.navigate('Details', {
            itemId: 86,
            otherParam: 'anything you want here',
          });
        }}
      />
    </View>
  );
}

function DetailsScreen({ route, navigation }) {
  /* 2. Get the param */
  const { itemId, otherParam } = route.params;
  return (
    <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>
      <Text>Details Screen</Text>
      <Text>itemId: {JSON.stringify(itemId)}</Text>
      <Text>otherParam: {JSON.stringify(otherParam)}</Text>
      <Button
        title="Go to Details... again"
        onPress={() =>
          navigation.push('Details', {
            itemId: Math.floor(Math.random() * 100),
          })