Version: 3.x

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: this.props.navigation.navigate('RouteName', { /* params go here */ })

  2. Read the params in your screen component: this.props.navigation.getParam(paramName, defaultValue).

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.

class HomeScreen extends React.Component {
render() {
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 */
this.props.navigation.navigate('Details', {
itemId: 86,
otherParam: 'anything you want here',
});
}}
/>
</View>
);
}
}
class DetailsScreen extends React.Component {
render() {
/* 2. Get the param, provide a fallback value if not available */
const { navigation } = this.props;
const itemId = navigation.getParam('itemId', 'NO-ID');
const otherParam = navigation.getParam('otherParam', 'some default value');
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={() =>
this.props.navigation.push('Details', {
itemId: Math.floor(Math.random() * 100),
})}
/>
<Button
title="Go to Home"
onPress={() => this.props.navigation.navigate('Home')}
/>
<Button
title="Go back"
onPress={() => this.props.navigation.goBack()}
/>
</View>
);
}
}
โ†’ Run this code

You can also directly access the params object with this.props.navigation.state.params. This may be null if no params were supplied, and so it's usually easier to just use getParam so you don't have to deal with that case.

If you want to access the params directly through props (eg. this.props.itemId) rather than this.props.navigation.getParam, you may use a community-developed react-navigation-props-mapper package.

Summary

  • navigate and push accept an optional second argument to let you pass parameters to the route you are navigating to. For example: this.props.navigation.navigate('RouteName', {paramName: 'value'}).
  • You can read the params through this.props.navigation.getParam
  • As an alternative to getParam, you may use this.props.navigation.state.params. It is null if no parameters are specified.
  • Full source of what we have built so far.