Edit in JSFiddle

let url = "https://docs.google.com/forms/d/e/1FAIpQLSfAnJAbfTl23gNM6gAbU1gAXo03N9I6pf5LJbo3Ptmex5nqUg/formResponse"; //action url
let form = document.querySelector("#form"); //form element

form.addEventListener("submit", (e) => {
  e.preventDefault(); //prevent default behaviour

  fetch(url, {
      method: "POST",
      mode: "no-cors",
      header: {
        'Content-Type': 'application/json'
      },
      body: getInputData()
    })
    .then(data => {
      console.log(data);
      alert("Form Submitted");
    })
    .catch(err => console.error(err));
});

//populating input data
function getInputData() {
  let dataToPost = new FormData(); //formdata API

  //fill name attributes to corresponding values
  dataToPost.append("entry.294341084", document.querySelector("#inp1").value);

  return dataToPost;
}

<article class="mid">
  <p>
    Only HTML form
  </p>
  <form method="post" action="https://docs.google.com/forms/d/e/1FAIpQLSfAnJAbfTl23gNM6gAbU1gAXo03N9I6pf5LJbo3Ptmex5nqUg/formResponse">
    <label for="inp10">Write something</label>
    <input type="text" name="entry.294341084" id="inp10">
    <input type="submit" value="Submit">
  </form>
	
<hr>

  <p>
    Fetch API + HTML form
  </p>
  <form method="post" id="form" action="https://docs.google.com/forms/d/e/1FAIpQLSfAnJAbfTl23gNM6gAbU1gAXo03N9I6pf5LJbo3Ptmex5nqUg/formResponse">
    <label for="inp1">Write something</label>
    <input type="text" name="entry.294341084" id="inp1">
    <input type="submit" value="Submit">
  </form>
</article>

article.mid {
  font-family: sans-serif;
  min-height: 400px;
  min-width: 400px;
  background: #def;
  border: 1px dashed #89e;
  margin: auto;
  width: 400px;
  position: relative;
}
hr{
	margin: 4rem auto;
	border: none;
}
p{
	color: #89e;
	text-align: center;
	border-bottom: 1px dashed #89e;
}
label,
input {
  text-align: center;
  display: block;
  padding: 0.25rem;
  margin: 1rem auto;
  color: #263db1;
  outline: none;
  border-radius: 1rem;
}

input {
  border: 2px solid #263db1;
}

input[type="submit"] {
  background-color: #263db1;
  color: #eee;
  border: 2px solid #89e;
  padding: 0.5rem;
}