Ship Faster and Control Releases with Feature Flag Management

1import flagsmith from 'flagsmith';
2// import flagsmith from 'react-native-flagsmith'; - Use this instead for React Native
3
4import { useFlags, FlagsmithProvider } from 'flagsmith/react';
5
6const App = () => (
7    <FlagsmithProvider options={{ environmentID: "QjgYur4LQTwe5HpvbvhpzK"}} flagsmith={flagsmith}>
8        <HomePage/>
9    </FlagsmithProvider>
10)
11
12const HomePage = () => {
13 const flags = useFlags(['chat_widget']); 
14  return (
15      <>{flags.chat_widget.enabled && <ChatWidget>}</>
16  );
17}
18

1import flagsmith from 'flagsmith/isomorphic';
2import { useFlags, FlagsmithProvider } from 'flagsmith/react';
3
4const App = ({ Component, pageProps, flagsmithState }) => (
5    <FlagsmithProvider serverState={flagsmithState} flagsmith={flagsmith}>
6        <Component {...pageProps} />
7    </FlagsmithProvider>
8)
9
10App.getInitialProps = async () => {
11  await flagsmith.init({ environmentID: "QjgYur4LQTwe5HpvbvhpzK"});
12  return { flagsmithState: flagsmith.getState() }
13}
14
15const HomePage = () => {
16 const flags = useFlags(['chat_widget']); 
17 return <>{flags.chat_widget.enabled && <ChatWidget>}</>
18}
19

1const Flagsmith = require('flagsmith-nodejs');
2
3const flagsmith = new Flagsmith({
4 environmentKey: 'TijpMX6ajA7REC4bf5suYg',
5});
6const identifier = 'delboy@trotterstraders.co.uk';
7const traitList = { car_type: 'robin_reliant' };
8
9const flags = await flagsmith.getIdentityFlags(identifier, traitList);
10var showButton = flags.isFeatureEnabled('secret_button');
11var buttonData = flags.getFeatureValue('secret_button');

1implementation 'com.github.Flagsmith:flagsmith-kotlin-android-client:1.0.1'
2
3lateinit var flagsmith : Flagsmith
4
5override fun onCreate(savedInstanceState: Bundle?) {
6    initFlagsmith();
7}
8
9private fun initFlagsmith() {
10    flagsmith = Flagsmith(environmentKey = FlagsmithConfigHelper.environmentDevelopmentKey, context = context)
11}
12
13flagsmith.getFeatureFlags { result ->
14    result.fold(
15        onSuccess = { flagList ->
16            Log.i("Flagsmith", "Current flags:")
17            flagList.forEach { Log.i("Flagsmith", "- ${it.feature.name} - enabled: ${it.enabled} value: ${it.featureStateValue ?: "not set"}") }
18        },
19        onFailure = { err ->
20            Log.e("Flagsmith", "Error getting feature flags", err)
21        })
22}

1pod 'FlagsmithClient', '~> 1.0'
2
3import FlagsmithClient
4
5func application(_ application: UIApplication, 
6  didFinishLaunchingWithOptions launchOptions: 
7  [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
8Flagsmith.shared.apiKey = "QjgYur4LQTwe5HpvbvhpzK"
9
10Flagsmith.shared.getFeatureFlags() { (result) in
11    switch result {
12    case .success(let flags):
13        for flag in flags {
14            let name = flag.feature.name
15            let value = flag.value
16            let enabled = flag.enabled
17            print(name, "= enabled:", enabled, "value:", value ?? "nil")
18        }
19}

1dependencies:
2  flagsmith:
3
4var flagsmith = 
5  FlagsmithClient(apiKey: 'TijpMX6ajA7REC4bf5suYg')
6
7bool featureEnabled = 
8  await flagsmith.hasFeatureFlag("chat_widget");
9if (featureEnabled) {
10    // run the code to execute enabled feature
11}
12
13var user = FeatureUser(identifier: 'flagsmith_sample_user');
14bool featureEnabled = a
15  wait flagsmith.hasFeatureFlag('chat_widget', user: user);
16if (featureEnabled) {
17    // run the code to execute enabled feature for given user
18}

1$ pip install flagsmith
2
3from flagsmith import Flagsmith;
4
5flagsmith = Flagsmith(
6    environment_key = "TijpMX6ajA7REC4bf5suYg"
7)
8
9identifier = "delboy@trotterstraders.co.uk"
10traits = {"car_type": "robin_reliant"}
11
12# The method below triggers a network request
13identity_flags = flagsmith.get_identity_flags(identifier=identifier, traits=traits)
14show_button = identity_flags.is_feature_enabled("secret_button")
15button_data = json.loads(identity_flags.get_feature_value("secret_button"))

1$ gem install flagsmith
2
3require "flagsmith"
4
5$flagsmith = Flagsmith::Client.new(
6  environment_key: 'TijpMX6ajA7REC4bf5suYg'
7)
8
9$identifier = 'delboy@trotterstraders.co.uk'
10$traits = {'car_type': 'robin_reliant'}
11
12$flags = $flagsmith.get_identity_flags($identifier, **$traits)
13$show_button = $flags.is_feature_enabled('secret_button')
14$button_data = $flags.get_feature_value('secret_button')

1$ dotnet add package Flagsmith --version 4.0.0
2
3using Flagsmith;
4
5FlagsmithClient _flagsmithClient;
6
7_flagsmithClient = new("TijpMX6ajA7REC4bf5suYg");
8
9var identifier = "delboy@trotterstraders.co.uk";
10var traitKey = "car_type";
11var traitValue = "robin_reliant";
12var traitList = new List { new Trait(traitKey, traitValue) };
13
14request
15var flags = _flagsmithClient.GetIdentityFlags(identifier, traitList).Result;
16var showButton = flags.IsFeatureEnabled("secret_button").Result;

1composer require flagsmith/flagsmith-php-client
2
3use Flagsmith\Flagsmith;
4
5$flagsmith = new Flagsmith('TijpMX6ajA7REC4bf5suYg');
6
7$identifier = 'delboy@trotterstraders.co.uk';
8$traits = (object) [ 'car_type' => 'robin_reliant' ];
9
10$flags = $flagsmith->getIdentityFlags($identifier, $traits);
11$showButton = $flags->isFeatureEnabled('secret_button');
12$buttonData = $flags->getFeatureValue('secret_button');

1go get github.com/Flagsmith/flagsmith-go-client/v2
2
3import (
4  flagsmith "github.com/Flagsmith/flagsmith-go-client"
5)
6
7// Initialise the Flagsmith client
8client := flagsmith.NewClient('TijpMX6ajA7REC4bf5suYg', flagsmith.WithContext(ctx),)
9
10trait := flagsmith.Trait{TraitKey: "trait", TraitValue: "trait_value"}
11traits = []*flagsmith.Trait{&trait}
12
13flags, _ := client.GetIdentityFlags(identifier, traits)
14
15showButton, _ := flags.IsFeatureEnabled("secret_button")
16buttonData, _ := flags.GetFeatureValue("secret_button")

1# Cargo.toml
2flagsmith = "~1"
3
4let options = FlagsmithOptions {..Default::default()};
5let flagsmith = Flagsmith::new(
6        env::var("TijpMX6ajA7REC4bf5suYg").expect("Key not found"), options,);
7
8use flagsmith_flag_engine::identities::Trait;
9use flagsmith_flag_engine::types::{FlagsmithValue, FlagsmithValueType};
10
11let identifier = "delboy@trotterstraders.co.uk";
12
13let traits = vec![Trait {
14            trait_key: "car_type".to_string(),
15            trait_value: FlagsmithValue {
16                value: "robin_reliant".to_string(),
17                value_type: FlagsmithValueType::String,
18            },
19        }];
20
21// The method below triggers a network request
22let identity_flags = flagsmith.get_identity_flags(identifier, Some(traits)).unwrap();
23
24let show_button = identity_flags.is_feature_enabled("secret_button").unwrap();
25let button_data = identity_flags.get_feature_value_as_string("secret_button").unwrap();