A response has a body, accessible using several methods:

• text() returns the body as a string
• json() returns the body as a JSON-parsed object
• blob() returns the body as a Blob object
• formData() returns the body as a FormData object
• arrayBuffer() returns the body as an ArrayBuffer object

All those methods return a promise. Examples:

fetch('./file.json')
  .then(response => response.text())
  .then(body => console.log(body))

fetch('./file.json')
  .then(response => response.json())
  .then(body => console.log(body))

The same can be written using async functions

;(async () => {
  const response = await fetch('./file.json')
  const data = await response.json()
  console.log(data)
})()

Lessons in this unit: