index.js

document.addEventListener("DOMContentLoaded", function() {
    const pswrdFieldSignup = document.querySelector(".formsignup .field-pass input[type='password']");
    const toggleBtnSignup = document.querySelector(".formsignup .field-pass i");

    toggleBtnSignup.onclick = () => {
        if (pswrdFieldSignup.type === "password") {
            pswrdFieldSignup.type = "text";
            toggleBtnSignup.classList.add("active");
        } else {
            pswrdFieldSignup.type = "password";
            toggleBtnSignup.classList.remove("active");
        }
    };
});