问如何在用户登录成功后，通过路由器立即跳转到新的页面(密码、用户名正确)

EN

                validate() {
                var email = document.getElementById("email").value;
                var atSign = email.indexOf("@");

                var error = document.getElementById("error");
                var mistakes = "";
                var hasErrors = false;

                if (this.newP != this.password){
                    mistakes += "Entered password is incorrect. ";
                    hasErrors = true;
                }

                if (atSign === -1) {
                    mistakes += "The email is missing an '@' sign.";
                    hasErrors = true;
                }
                // console.log(this.newP.length)
                if (hasErrors === true) {
                    error.innerHTML = mistakes;
                    return false;
                } else {
                    alert("Login confirmed");
                    return true;
                //I realize it's supposed to be here, but I do not know                                                                
                //how to write it.
                }
                }