example-sdk-kairosk.js

let KairosSDK = {};

KairosSDK.login = () => {
    const iframe = document.getElementById('iframe_kairos_app_sdk');
    iframe.contentWindow.postMessage({
        event: 'session'
    }, '*');
};

KairosSDK.check = () => {
    const token = window.localStorage.getItem('KairosSDK_TOKEN');
    const user = window.localStorage.getItem('KairosSDK_USER');
    return {token, user};
};

KairosSDK.receiveMessage = (opt) => {
    if (opt.data.event === 'session_result') {
        console.log(opt.data);
        if (opt.data && opt.data.token) {
            window.localStorage.setItem('KairosSDK_TOKEN', opt.data.token);
        }
        if (opt.data && opt.data.user) {
            window.localStorage.setItem('KairosSDK_USER', opt.data.user);
        }
        return opt.data;
    } else {
        return false;
    }
};

if (window.addEventListener) {
    window.addEventListener("message", KairosSDK.receiveMessage, false);
} else {
    window.attachEvent("onmessage", KairosSDK.receiveMessage);
}

window.KairosSDK = KairosSDK;

Script que contiene funciones principales para poder acceder al localStorage del otro dominio donde se inserte el iframe