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JavaScript Asynchronous Programming with JavaScript Understanding Promises Using Fetch

Posted by Kirt Perez
Kirt Perez
7,374 Points

Is .json() the same as JSON.parse()?

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1 Answer

Jennifer Nordell
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Jennifer Nordell
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Jennifer Nordell
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Jennifer Nordell
Treehouse Teacher

Hi there, Kirt Perez! They are very similar, but not exactly the same. Yes, they both create JSON. However, the .json() is asynchronous and returns a Promise. While the JSON.parse is synchronous. The .json() takes the Response and turns it into JSON while the JSON.parse() takes a JSON formatted string and returns any one of a few data types.

For more information, I recommend the following:

Hope this helps! :sparkles:

karan Badhwar
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karan Badhwar
Web Development Techdegree Graduate 18,135 Points
karan Badhwar
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karan Badhwar
Web Development Techdegree Graduate 18,135 Points

Hi, Jennifer Nordell, but on MDN it says, it returns a JavaScript Object not the JSON file. As, if it returns a JSON file, then how are we using it and extracting the JSON file to an Array of Objects to use. Moreover, @Guil also said it returns a JSON , but if it is returning the JSON, then where are we actually parsing the file into an array ?

MDN explanation below: -

Note that despite the method being named json(), the result is not JSON but is instead the result of taking JSON as input and parsing it to produce a JavaScript object.