javascript fetch headers

1fetch('https://example.com/profile', {
2  method: 'POST', // or 'PUT'
3  headers: {
4    'Content-Type': 'application/json',
5  },
6  body: JSON.stringify(data),
7})
8.then(response => response.json())
9.then(data => {
10  console.log('Success:', data);
11})
12.catch((error) => {
13  console.error('Error:', error);
14});

1//Obj of data to send in future like a dummyDb
2const data = { username: 'example' };
3
4//POST request with body equal on data in JSON format
5fetch('https://example.com/profile', {
6  method: 'POST',
7  headers: {
8    'Content-Type': 'application/json',
9  },
10  body: JSON.stringify(data),
11})
12.then((response) => response.json())
13//Then with the data from the response in JSON...
14.then((data) => {
15  console.log('Success:', data);
16})
17//Then with the error genereted...
18.catch((error) => {
19  console.error('Error:', error);
20});
21
22//																		Yeah

1// There were no quick access to mode and credentials to other fetch answers.
2// Data you'll be sending
3const data = { funny: "Absolutely not", educational: "yas" }
4
5fetch('https://example.com/api/', {
6  method: 'POST', // The method
7  mode: 'no-cors', // It can be no-cors, cors, same-origin
8  credentials: 'same-origin', // It can be include, same-origin, omit
9  headers: {
10    'Content-Type': 'application/json', // Your headers
11  },
12  body: JSON.stringify(data),
13}).then(returnedData => {
14  // Do whatever with returnedData
15}).catch(err => {
16  // In case it errors.
17})

1fetch('http://example.com/movies.json')
2  .then((response) => {
3    return response.json();
4  })
5  .then((myJson) => {
6    console.log(myJson);
7  });

1fetch('http://example.com/movies.json')
2  .then((response) => {
3    return response.json();
4  })
5  .then((data) => {
6    console.log(data);
7  });
8

1var formData = new FormData();
2var fileField = document.querySelector("input[type='file']");
3
4formData.append('username', 'abc123');
5formData.append('avatar', fileField.files[0]);
6
7fetch('https://example.com/profile/avatar', {
8  method: 'PUT',
9  body: formData
10})
11.then(response => response.json())
12.catch(error => console.error('Error:', error))
13.then(response => console.log('Success:', response));