Fetch is a function to retrieve resources from a server

Example using .then

fetch('https://jsonplaceholder.typicode.com/todos')
  .then((res) => res.json())
  .then((data) => console.log(data.slice(0, 3)))

Example using async await

async function getText(file) {
  let myObject = await fetch(file);
  let myText = await myObject.json();
  console.log(myText.slice(0, 3));
}
getText('https://jsonplaceholder.typicode.com/todos')

Fetch and Map in React