react-native-ab

A component for rendering A/B tests in React Native.

Getting started

1. npm install react-native-ab@latest --save

Obtaining your metrics

Once you've got your A/B tests set up, you'll need a place to send the data. Check out these libraries for A/B testing:

• Google Analytics (react-native-google-analytics)

Usage

All you need is to require the react-native-ab module and then use the provided tags (<Experiment>, and <Variant>).

import React from 'react';

import {
  AppRegistry,
  StyleSheet,
  Text,
  View,
  TouchableHighlight
} from 'react-native';

import { Experiment, Variant } from 'react-native-ab';

let rnabtest = React.createClass({
  render: function() {
    return (
      <View style={styles.container}>
        <TouchableHighlight onPress={this._resetExperiment}>
          <View>
            <Experiment
              ref="welcomeExperiment"
              name="welcome-message"
              onChoice={(test, variant) => console.log(test, variant)}
            >
              <Variant name="standard">
                <Text style={styles.welcome}>
                  Welcome to React Native!
                </Text>
              </Variant>
              <Variant name="friendly">
                <Text style={styles.welcome}>
                  Hey there! Welcome to React Native!
                </Text>
              </Variant>
              <Variant name="western">
                <Text style={styles.welcome}>
                  Howdy, partner! This here is React Native!
                </Text>
              </Variant>
            </Experiment>
          </View>
        </TouchableHighlight>
        <Text style={styles.instructions}>
          To get started, edit index.ios.js
        </Text>
        <Text style={styles.instructions}>
          Press Cmd+R to reload,{'\n'}
          Cmd+Control+Z for dev menu
        </Text>
      </View>
    );
  },

  _resetExperiment() {
    this.refs.welcomeExperiment.reset();
  }
});

var styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#F5FCFF',
  },
  welcome: {
    fontSize: 20,
    textAlign: 'center',
    margin: 10,
  },
  instructions: {
    textAlign: 'center',
    color: '#333333',
    marginBottom: 5,
  },
});

AppRegistry.registerComponent('rnabtest', () => rnabtest);

<Experiment> Properties

name

The name of your experiment, for example "welcome-message".

choose

Example callback signature: function(variants) Must return an instance of Variant

A function which should use a randomization algorithm to pick one of your variants. Defaults to a random selection using Math.random()

onChoice

Example callback signature: function(experimentName, variantName)

Called when a Variant has been chosen for your Experiment.

onRawChoice

Example callback signature: function(experiment, variant)

Same as onChoice, but the objects passed are React component instances.

<Experiment> methods

You can access component methods by adding a ref (ie. ref="welcomeExperiment") prop to your <Experiment> element, then you can use this.refs.welcomeExperiment.reset(), etc. inside your component.

reset()

Resets the experiment. The next time the experiment is rendered, a new variant may be chosen.

getActiveVariant()

Returns the currently displayed Variant.

getVariant(variantName)

Returns the instance of the specified Variant name.

<Variant> Properties

name

The name of your variant, for example "western".

Subviews

Only the Variant tag element exist within the Experiment element. Variant tags can contain only one root element.