Failed to execute ‘fetch’ on ‘Window’: The provided value is not of type ‘RequestInit’

Can not fetch data,and the error what I have seen is first time

I am testing it on laptop ,so I am using window.location.origin to fetch data

  let jsonObject = await JSON.stringify({
        name,
        description,
        cetegory,
        thumb,
        images,
        selling_price_canada: sellingStyle === 'per_price' ?selling_price_canada : 'none',
        selling_price_india: sellingStyle === 'per_price' ?selling_price_india : 'none',
        selling_Amount: sellingStyle === 'per_price' ? selling_Amount : 'none',
        selling_style,
        selling_country,
        size_and_price,
        delivery_charge_in_canada,
        delivery_charge_in_india
    })

 let fetchOptions = {
        method:'POST',
        headers: {
            'Content-Type': 'application/json'
        },
        body: jsonObject
    }

    uploadTheProductBtn.style.opacity = .7;
    uploadingStatus = true;
    let url = window.location.origin + '/api/api_s/upload-product';
    
    fetch(url, jsonObject)
      .then(res => res.json())
      .then(({error, success}) => {
        if (error) return alert(error)
        if (success) return alert('success');
      })
      .catch(e => console.log(e))
      .finally(e => {
        uploadTheProductBtn.style.opacity = 1;
        uploadingStatus = false;
    })

And I found This error –

TypeError: Failed to execute ‘fetch’ on ‘Window’: The provided value is not of type ‘RequestInit’

I was expecting to post data on the server