I unfortunately am calling a service which may or may not return JSON (or any) body data.

When I do the following, I get the TypeError: body used already for error:

let data = null

try {
  data = await res.json()
} catch (e) {
  data = await res.text()
}

Two things:

• I should be able to call .json() / .text() multiple times
• If the body is empty, it should just return null instead of throwing on .text()