nodejs fetch implementation using superflous "then"?

Asked Jan 19 '18 at 22:57

Active Jan 19 '18 at 23:20

Viewed 88 times

I just started using the library "node-fetch". In the documentation there a serveral examples on how to use the library:

fetch('https://api.github.com/users/github')
    .then(function(res) {
        return res.json();
    }).then(function(json) {
        console.log(json);
    });

All the examples are written in this style of concatenated then-calls.

Couldn't I just have one single then-call and be done with it?

Like this?

fetch('https://api.github.com/users/github')
    .then(function(res) {
        console.log(res.json());
    });

Whats the advantage of having multiple then-calls?

asked Jan 19 '18 at 22:57

Tobias Gassmann

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[No](https://developer.mozilla.org/en-US/docs/Web/API/Body/json). – Patrick Roberts Jan 19 '18 at 22:59
ahh, res.json() returns a promise.. and thats exactly the promise that executes the second "then" when it is resolved.. – Tobias Gassmann Jan 19 '18 at 23:35
This is when async/await pattern shines: `var res = await fetch('https://api.github.com/users/github'); console.log(await res.json());` – Krzysztof Suszka Jan 20 '18 at 00:57
@KrzysztofSuszka assuming that is within the body of an `async` function. – Patrick Roberts Jan 20 '18 at 00:59
@PatrickRoberts - of course, and assuming that you use node version which supports async/await :) – Krzysztof Suszka Jan 20 '18 at 01:03
ES2017/ES8 is the current standard, so that's something that can be safely assumed. If you want to write an answer regarding `async`/`await`, feel free to do so. – Patrick Roberts Jan 20 '18 at 01:12

nodejs fetch implementation using superflous "then"?

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