InboxSDK.load('1', 'Hello World!').then(function(sdk){

    // the SDK has been loaded, now do something with it!
    sdk.Compose.registerComposeViewHandler(function(composeView){

        const statusBar = composeView.addStatusBar({
            addAboveNativeStatusBar: true,
        })
        const button = document.createElement("button")
        button.innerHTML = "Do Something"
        button.addEventListener("click", function () {
            alert("did something")
        })
        statusBar.el.appendChild(button)

    });

});