xhr

I've got code that looks like this:

const xhr = new XMLHttpRequest()
xhr.upload.addEventListener("progress", (e) => {
  // ...
})

When I run my test I get this error:

    TypeError: Cannot read property 'addEventListener' of null

      40 |         const xhr = new XMLHttpRequest()
      41 |         console.log(xhr)
    > 42 |         xhr.upload.addEventListener("prog