Guide on How to Navigate JSONP Responses in Goodreads

I've been working on a project that involves pulling data from Goodreads' API in order to display the rating for a specific book. However, I've hit a bit of a snag.

Upon requesting data from this URL (

https://www.goodreads.com/book/review_counts.json?isbns=9781630586799&key=YOUR_KEY&callback=myCallback
), Goodreads sends back the following JSONP data:

myCallback([{
    "id":22571333,
    "isbn":"163058679X",
    "isbn13":"9781630586799",
    "ratings_count":657,
    "reviews_count":2288,
    "text_reviews_count":138,
    "work_ratings_count":835,
    "work_reviews_count":2596,
    "work_text_reviews_count":155,
    "average_rating":"3.93"
}])

Here is the javascript code I am using:

function myCallback(result) {
    document.getElementById('goodreads-rating').innerHTML = result.average_rating;
}

var scriptTag = document.createElement('script');
scriptTag.src = "https://www.goodreads.com/book/review_counts.json?isbns=9781630586799&key=YOUR_KEY&callback=myCallback";
document.getElementsByTagName('head')[0].appendChild(scriptTag);

My goal is to retrieve the average_rating from the data. However, when the HTML renders, all I see is the word "undefined".

I suspect that the issue lies in how I am handling the array/object within the response.

Can anyone offer some insight into what might be going wrong?

javascriptarraysjsonobjectjsonp

Answer №1

This solution resolved my issue:

result[0].average_rating;

I have come to understand that I was attempting to access specific elements within an array, hence the requirement to specify the index number [0]. Much appreciation to @dandavis for providing the helpful response!

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