index.js

document.querySelector(".js-login").addEventListener("click", async function(event) {
    try {
        const userData = await waves.login();  // calling Waves Signer
        event.target.classList.add("clicked");
        event.target.innerHTML = `
            authorized as <br>
            ${userData.address}`;              // getting account address
    } catch (e) {
        console.error('login rejected')        // handling user auth reject
    }
});