SharePoint REST API with fetch().then() and Ajax()

Using ajax

$.ajax({ url: "https://mysite.sharepoint.com/_api/web/lists/getbytitle('list')/items(" + id + ")", method: "GET", headers: { "Accept": "application/json; odata=verbose" }, success: function (data) { console.log(data.d.results); } });

Using fetch() and then()

payload = { method: 'GET', headers: { "Accept": "application/json; odata=verbose" }, credentials: 'same-origin' // or credentials: 'include' } fetch("https://mysite.sharepoint.com/_api/Web/Lists/GetByTitle('list')/items?$select=ID,Title", payload) .then(response => response.json()) .then((data)=>{ console.log(data.d.results) })