fetch api, property set in console but not in app code example

Example 1: fetch api template

//fetch api template
const fetchData=(inputs)=>{
fetch('https://example.com/api', {
    method: 'post',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(inputs)
  })
  .then(function(response) {
    return response.json();
  })
  .then(function(data) {
    ChromeSamples.log(data.whatever);
  });
}

Example 2: redirect to website from promise value fetch

fetch("http://example.com/", {
	method: 'POST',
	mode: 'cors',
	body: formData
})
.then(dataWrappedByPromise => dataWrappedByPromise.text())
.then(data => {
	//Redirect is the URL inside the text of the response promise
	window.location.replace(data);
})