如何使用没有ajax的params发送get请求

<form action="http://example.com/api" method="get">
 <input type="hidden" name="param1" value="value1">
 <input type="hidden" name="param2" value="value2">
 <input type="submit" value="Submit">
</form>

function sendGetRequest() {
  var url = "http://example.com/api?param1=value1&param2=value2";
  window.location.href = url;
}

function sendGetRequest() {
  var url = "http://example.com/api?param1=value1&param2=value2";
  fetch(url)
    .then(response => response.json())
    .then(data => console.log(data))
    .catch(error => console.error(error));
}

function sendGetRequest() {
  var url = "http://example.com/api?param1=value1&param2=value2";
  var xhr = new XMLHttpRequest();
  xhr.open("GET", url, true);
  xhr.onreadystatechange = function() {
    if (xhr.readyState == 4 && xhr.status == 200) {
      var data = JSON.parse(xhr.responseText);
      console.log(data);
    }
  };
  xhr.send();
}