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APIs Create a Reusable Fetch Function

Joseph Michelini
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Joseph Michelini
Python Development Techdegree Graduate 18,692 Points
Posted by Joseph Michelini
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Joseph Michelini
Python Development Techdegree Graduate 18,692 Points

Why doesn't the fetchData function need to be an async/await function?

I thought because there is a fetch() request inside the function, and because it is otherwise written as a synchronous event (regular function), that it had to be labeled as an async function with await after return and before fetch().

Here's the bit of code I'm referring to, specifically the first function:

function fetchData(url) {
  return fetch(url).then((res) => res.json());
}

fetchData("https://dog.ceo/api/breeds/image/random").then((data) =>
  generateImage(data.message)
);

fetchData("https://dog.ceo/api/breeds/list").then((data) =>
  generateList(data.message)
);

Thanks!

1 Answer

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

The code here is using "then" to make sure the operations occur at the right time. Using "then" is similar to using "await" except that "then" fires a separate callback function after the promise resolves, but "await" pauses the current function until the promise resolves.

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

Thanks for the kind words, and happy holidays!   :christmas_tree: