Login (PopUp)
Source
// JS SDK v1.43.0
function loginWithKakao() {
    Kakao.Auth.login({
        success: function (authObj) {
            console.log('success', authObj)
            Kakao.Auth.setAccessToken(authObj.access_token);
        },
        fail: function (err) {
            console.error(err);
        },
    })
}