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    @absmartly/javascript-sdk

    1.6.0 • Public • Published

    A/B Smartly SDK npm version

    A/B Smartly - JavaScript SDK

    Compatibility

    The A/B Smartly Javascript SDK is an isomorphic library for Node.js (CommonJS and ES6) and browsers (UMD).

    It's supported on Node.js version 6.x and npm 3.x or later.

    It's supported on IE 10+ and all the other major browsers.

    Note: IE 10 does not natively support Promises. If you target IE 10, you must include a polyfill like es6-promise or rsvp.

    Installation

    npm

    npm install @absmartly/javascript-sdk --save

    Import in your Javascript application

    const absmartly = require('@absmartly/javascript-sdk');
    // OR with ES6 modules:
    import absmartly from '@absmartly/javascript-sdk';

    Directly in the browser

    You can include an optimized and pre-built package directly in your HTML code through unpkg.com.

    Simply add the following code to your head section to include the latest published version.

        <script src="https://unpkg.com/@absmartly/javascript-sdk/dist/absmartly.min.js"></script>

    Getting Started

    Please follow the installation instructions before trying the following code:

    Initialization

    This example assumes an Api Key, an Application, and an Environment have been created in the A/B Smartly web console.

    // somewhere in your application initialization code
    const sdk = new absmartly.SDK({
        endpoint: 'https://sandbox.absmartly.io/v1',
        apiKey: process.env.ABSMARTLY_API_KEY,
        environment: process.env.NODE_ENV,
        application: process.env.APPLICATION_NAME,
    });

    Creating a new Context with raw promises

    // define a new context request
    const request = {
        units: {
            session_id: '5ebf06d8cb5d8137290c4abb64155584fbdb64d8',
        },
    };
    
    // create context with raw promises
    const context = sdk.createContext(request);
    
    context.ready().then((response) => {
        console.log("ABSmartly Context ready!")
    }).catch((error) => {
        console.log(error);
    });

    Creating a new Context with async/await

    // define a new context request
    const request = {
        units: {
            session_id: '5ebf06d8cb5d8137290c4abb64155584fbdb64d8',
        },
    };
    
    // create context with raw promises
    const context = sdk.createContext(request);
    
    try {
        await context.ready();
        console.log("ABSmartly Context ready!")
    } catch (error) {
        console.log(error);
    }

    Creating a new Context with pre-fetched data

    When doing full-stack experimentation with A/B Smartly, we recommend creating a context only once on the server-side. Creating a context involves a round-trip to the A/B Smartly event collector. We can avoid repeating the round-trip on the client-side by sending the server-side data embedded in the first document, for example, by rendering it on the template. Then we can initialize the A/B Smartly context on the client-side directly with it.

        <head>
            <script type="javascript">
                const request = {
                    units: {
                        session_id: '5ebf06d8cb5d8137290c4abb64155584fbdb64d8',
                    },
                };
    
                const context = sdk.createContextWith(request, {{ serverSideContext.data() }});
            </script>
        </head>

    Setting context attributes

    The attribute() and attributes() methods can be called before the context is ready.

    context.attribute('user_agent', navigator.userAgent);
    
    context.attributes({
        customer_age: 'new_customer',
    });

    Selecting a treatment

    if (context.treament("exp_test_experiment") == 0) {
        // user is in control group (variant 0)
    } else {
        // user is in treatment group
    }

    Tracking a goal achievement

    Goals are created in the A/B Smartly web console.

    context.track("payment", { item_count: 1, total_amount: 1999.99 });

    Publishing pending data

    Sometimes it is necessary to ensure all events have been published to the A/B Smartly collector, before proceeding. One such case is when the user is about to navigate away right before being exposed to a treatment. You can explicitly call the publish() method, which returns a promise, before navigating away.

    await context.publish().then(() => {
        window.location = "https://www.absmartly.com"
    })

    Finalizing

    The finalize() method will ensure all events have been published to the A/B Smartly collector, like publish(), and will also "seal" the context, throwing an error if any method that could generate an event is called.

    await context.finalize().then(() => {
        window.location = "https://www.absmartly.com"
    })

    Refreshing the context with fresh experiment data

    For long-running single-page-applications (SPA), the context is usually created once when the application is first reached. However, any experiments being tracked in your production code, but started after the context was created, will not be triggered. To mitigate this, we can use the refreshInterval option when creating the context.

    const request = {
        units: {
            session_id: '5ebf06d8cb5d8137290c4abb64155584fbdb64d8',
        },
    };
    
    const context = sdk.createContext(request, {
        refreshInterval: 5 * 60 * 1000
    });

    Alternatively, the refresh() method can be called manually. The refresh() method pulls updated experiment data from the A/B Smartly collector and will trigger recently started experiments when treatment() is called again.

    setTimeout(async () => {
        try {
            context.refresh();
        } catch(error) {
            console.error(error);
        }
    }, 5 * 60 * 1000);

    Using a custom Event Logger

    The A/B Smartly SDK can be instantiated with an event logger used for all contexts. In addition, an event logger can be specified when creating a particular context, in the createContext call options. The example below illustrates this with the implementation of the default event logger, used if none is specified.

    const sdk = new absmartly.SDK({
        endpoint: 'https://sandbox-api.absmartly.com/v1',
        apiKey: process.env.ABSMARTLY_API_KEY,
        environment: process.env.NODE_ENV,
        application: process.env.APPLICATION_NAME,
        eventLogger: (context, eventName, data) => {
            if (eventName == "error") {
                console.error(data);
            }
        },
    });

    The data parameter depends on the type of event. Currently, the SDK logs the following events:

    eventName when data
    "error" Context receives an error error object thrown
    "ready" Context turns ready data used to initialize the context
    "refresh" Context.refresh() method succeeds data used to refresh the context
    "publish" Context.publish() method succeeds data sent to the A/B Smartly event collector
    "exposure" Context.treatment() method succeeds on first exposure exposure data enqueued for publishing
    "goal" Context.track() method succeeds goal data enqueued for publishing
    "finalize" Context.finalize() method succeeds the first time undefined

    Peek at treatment variants

    Although generally not recommended, it is sometimes necessary to peek at a treatment without triggering an exposure. The A/B Smartly SDK provides a peek() method for that.

    if (context.peek("exp_test_experiment") == 0) {
        // user is in control group (variant 0)
    } else {
        // user is in treatment group
    }

    Overriding treatment variants

    During development, for example, it is useful to force a treatment for an experiment. This can be achieved with the override() and/or overrides() methods. The override() and overrides() methods can be called before the context is ready.

        context.override("exp_test_experiment", 1); // force variant 1 of treatment
        context.overrides({
            exp_test_experiment: 1,
            exp_another_experiment: 0,
        });

    About A/B Smartly

    A/B Smartly is the leading provider of state-of-the-art, on-premises, full-stack experimentation platforms for engineering and product teams that want to confidently deploy features as fast as they can develop them. A/B Smartly's real-time analytics helps engineering and product teams ensure that new features will improve the customer experience without breaking or degrading performance and/or business metrics.

    Have a look at our growing list of clients and SDKs:

    Install

    npm i @absmartly/javascript-sdk

    DownloadsWeekly Downloads

    270

    Version

    1.6.0

    License

    Apache-2.0

    Unpacked Size

    212 kB

    Total Files

    29

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