Before launching an experience you must first install and initialize Supertab.js You must have a Supertab clientId to use Supertab.js. You can find the clientId associated with each of your sites in the business portal.

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From npm

For use with bundlers, you can install Supertab.js from the npm registry.
Install
npm install @getsupertab/supertab-js
Then import the Supertab class and instantiate it:
Initialize
import { Supertab } from "@getsupertab/supertab-js";

const supertabClient = new Supertab({ clientId: "test_client.X" });

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From CDN

You can load Supertab.js from our CDN using either a direct ES Module import or by using the global loader script.

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With an ES Module import

The compiled module exports the Supertab class.
Import & Initialize
<script type="module">
    import { Supertab } from "https://js.supertab.co/v3/supertab.js"

    const supertabClient = new Supertab({ clientId: "test_client.X" });
</script>

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With the global loader function

For environments that don’t support ES modules, you can use the global loader. This script exposes the global function window.loadSupertab(). It returns a promise that resolves with the Supertab class.. You can handle promises through the use of async / await or through promise chaining with .then(). 
<script src="https://js.supertab.co/v3/supertab.global.js"></script>
<script>
    (async () => {
        const { Supertab } = await window.loadSupertab();
        const supertabClient = new Supertab({ clientId: "test_client.X" });
    })();
</script>

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Versioning

The CDN URL is versioned, including v3 will automatically upgrade you to new minor versions. Breaking changes are included in new major versions.