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Before we can begin to access authentication state, the Corbado.load() call has to resolve. Find more here.

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One-time access to Authentication State

If you want to access user state once, you can simply call Corbado.sessionToken, Corbado.user or Corbado.isAuthenticated to get the current user state.
main.html
<!DOCTYPE html>
<html>
<head>
    <link
        rel="stylesheet"
        href="https://unpkg.com/@corbado/web-js@2/dist/bundle/index.css"
    />
    <script src="https://unpkg.com/@corbado/web-js@2/dist/bundle/index.js"></script>
<body>
    <script type="module">
        await Corbado.load({
            projectId: "pro-1234567890"
        });
        const submitButton = document.getElementById("submitButton");
        submitButton.addEventListener("click", async () => {
            if (Corbado.isAuthenticated) {
                const resp = await fetch("https://acme.com/api", {
                    headers: {
                        // access the users session token once
                        Authorization: `Bearer ${Corbado.sessionToken}`
                    }
                });
            }
            // ...
        });
    </script>
    <button id="submitButton">Submit</button>
</body>
</html>

​
Subscribing to Authentication State

If you want to be informed about any updates in authentication state, you can subscribe to the authStateChanges and userChanges observables.
main.html
<!DOCTYPE html>
<html>
<head>
    <link
        rel="stylesheet"
        href="https://unpkg.com/@corbado/web-js@2/dist/bundle/index.css"
    />
    <script src="https://unpkg.com/@corbado/web-js@2/dist/bundle/index.js"></script>
<body>
    <script type="module">
        await Corbado.load({
            projectId: "pro-1234567890"
        });
        const userIdElement = document.getElementById("userId");
        Corbado.userChanges.subscribe((next) => {
            userIdElement.innerText = next?.sub || "Not logged in";
        })
    </script>
    <h1 id="userId"></h1>
</body>
</html>

​
Logout

You can log out the user by calling Corbado.logout.
main.html
<!DOCTYPE html>
<html>
<head>
    <link
        rel="stylesheet"
        href="https://unpkg.com/@corbado/web-js@2/dist/bundle/index.css"
    />
    <script src="https://unpkg.com/@corbado/web-js@2/dist/bundle/index.js"></script>
<body>
    <script type="module">
        await Corbado.load({
            projectId: "pro-1234567890"
        });

        const logoutButton = document.getElementById('logoutButton');
        logoutButton.addEventListener('click', async function () {
            await Corbado.logout();
            window.location.href = '/';
        });
    </script>
    <button id="logoutButton">Logout</button>
</body>
</html>