getEmployees().then( response => {
    console.log(JSON.parse(response))
})
.catch(function(error) {
    console.error(error);
})


function getEmployees() {
    return new Promise(function(resolve, reject) {
        let url = "http://localhost:8000/api/employees";
        let http = new XMLHttpRequest();
        http.open('get', url, true);
        http.send();
        http.onload = function() {
            if(http.status == 200) {
                resolve(http.responseText);
            }else {
                reject('Hiba! A lekérés sikertelen!')
            }
        }
        http.onerror = function() {
            reject('Hiba! A hálózat nem elérhető!')
        }
    }) 
}