I am trying to access post information in php file, but I clearly cannot find a way how to do it since I do not enter the if statement:

php code:

<?php

    if(isset($_POST["submit"])){
      var_dump($_POST);
     }
exit();

js code:

   const name = document.getElementById("name").value;
       

   const formData = new FormData();
   formData.set("name", name);
   formData.set("submit", "submit");

   fetch('./includes/index.inc.php', {  
      method: 'post',  
      body: formData
    })
    .then(function(res){ return res.text })
    .then(function(text){console.log(text)})
    .catch(function(res){ console.log(res) })

Does service worker play a role here?