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<script>

    function handleSubmit(event) {
      event.preventDefault();
    
      const username = new FormData(event.target);
      const password = new FormData(event.target);
    
      const value_username = username.get('uname');
      const value_password = password.get('psw');
    
      console.log({ value_username });
      console.log({ value_password });
    }
    
    const form = document.querySelector('form');
    form.addEventListener('submit', handleSubmit);
    
    let formData = new FormData();
    formData.append('name', value_username);
    formData.append('password', value_password);
    
    fetch("api/SampleData",
        {
            body: formData,
            method: "post"
        });
    
    </script>