
                1
                
              

                2
                async function getUserById(userId) {
              

                3
                  return new Promise((resolve) => {
              

                4
                    setTimeout(() => {
              

                5
                      const result = {
              

                6
                        id: 1,
              

                7
                        name: "someone",
              

                8
                        userEmail: "someone@everyone@email.com"
              

                9
                      };
              

                10
                      resolve(result);
              

                11
                    }, 1000);
              

                12
                  });
              

                13
                }
              

                14
                
              

                15
                async function sendEmail(email) {
              

                16
                  return new Promise((resolve) => {
              

                17
                    setTimeout(() => {
              

                18
                      resolve(`Email sent successfully to ${email}`);
              

                19
                    }, 1000);
              

                20
                  });
              

                21
                }
              

                22
                
              

                23
                getUserById(1)
              

                24
                  .then(function (result) {
              

                25
                    console.log(result);
              

                26
                    return result;
              

                27
                  })
              

                28
                  .then(function (userData) {
              

                29
                    console.log('Email to be sent');
              

                30
                    // return promise
              

                31
                    return sendEmail(userData.userEmail);
              

                32
                  })
              

                33
                  .then(function (emailStatus) {
              

                34
                    // waits until sendEmail is resolved
              

                35
                    console.log(emailStatus);
              

                36
                  })
              

                37
                  .catch(function (err) {
              

                38
                    console.error('Error:', err);
              

                39
                  });
              

                40
                
              

                41
                
              

                42
                OUTPUT:
              

                43
                Hello World
              

                44
                undefined
              

                45
                {
              

                46
                 id:1,
              

                47
                 name:someone,
              

                48
                 userEmail:someone@everyone@email.com
              

                49
                }
              

                50
                Email to be sent
              

                51
                Email sent
              

                52