Вы можете использовать Локальное хранилище -
axios({
method: 'post',
url: 'http://localhost:4000/login',
data: {
user_email: formData.user_email.value,
user_password: formData.user_password.value,
}
}).then(res => {
if (res && !res.data.error) {
localStorage.setItem('sessionID', res.data.data.sessionID);
localStorage.setItem('token', res.data.data.token);
localStorage.setItem('sessionEmail', res.data.data.sessionEmail);
localStorage.setItem('notify', JSON.stringify({msg: res.data.message, type: 'success'}));
this.props.history.push("/testlist");
} else if (res.data.error) {
localStorage.setItem('notify', JSON.stringify({msg: res.data.message, type: 'error'}));
}else if ( !res.data.error) {
localStorage.removeItem('token', res.data.data.token);
localStorage.setItem('notify', JSON.stringify({msg: res.data.message, type: 'error'}));
} else {
localStorage.setItem('notify', JSON.stringify({msg: res.data.message, type: 'error'}));
}
}, err => {
console.log(err);
localStorage.setItem('notify', JSON.stringify({msg: '500 api error', type: 'error'}));
});
}