fetch(`http://endpoint.com`, {
  method: 'GET', // *GET, POST, PUT, DELETE, etc.
  mode: 'cors', // no-cors, *cors, same-origin
  cache: 'no-cache', // *default, no-cache, reload, force-cache, only-if-cached
  credentials: 'omit', // include, *same-origin, omit
  headers: {
    'Content-Type': 'application/json'
  },
})
.then((res) => res.json())
.then((data)=> {
  console.log('data', data)
})

"Uncaught (in promise) SyntaxError: Unexpected end of input"

"Access to fetch at '...' from origin 'null' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'"

"JSON.parse: unexpected end of data at line 1 column 1 of the JSON data"