js get all data in form

1document.addEventListener('submit', function (event) {
2    let fd = new FormData(event.target);
3})

1document.addEventListener('submit', function (event) {
2
3	event.preventDefault();
4
5	fetch('https://xxx.xxx', {
6		method: 'POST',
7		body: new FormData(event.target),
8	}).then(function (response) {
9		if (response.ok) {
10			return response.json();
11		}
12		return Promise.reject(response);
13	}).then(function (data) {
14		console.log(data);
15	})
16});
17