When working in Shopify, I have found that I am able to easily access a JSON object from the browser console, however I have run

Currently, I am utilizing the GET/cart.js call in an asset on my theme to retrieve the cart contents in a JSON object format as shown below:

var response = jQuery.getJSON('/cart.js');

Afterward, I attempt to display the contents of the object in the console like this (within the same snippet file, immediately after making the call):

$( document ).ready(function() {
    console.log(response.responseJSON.items[0]);
});

However, when I do so, I encounter a 

TypeError: response.responseJSON is undefined
error in the console. Strangely enough, if I try to log the same thing again within the console (
console.log(response.responseJSON.items[0]);
), it works perfectly and prints out the first item from the cart.

I've experimented with checking the object until it's no longer undefined using a while loop, and also attempted logging only after the page has fully loaded.

Just for clarity, here are the complete contents of my snippet:

var response = jQuery.getJSON('/cart.js');
$( document ).ready(function() {
    console.log(response.responseJSON.items[0]);
});

Any suggestions on how I can make this function directly within my snippet file?

EDIT: It's worth mentioning that the object is already parsed, so that isn't why I'm receiving an undefined message. I did try parsing it again just to see, but encountered another error.

EDIT 2: Here is the JSON data retrieved from the call:

{
  "readyState": 4,
  "responseText": "{\"token\":\"4472c3d68931e8fe2bff0afcca67a188\",\"note\":null,\"attributes\":{},\"original_total_price\":39800,\"total_price\":39800,\"total_discount\":0,\"total_weight\":0.0,\"item_count\":2,\"items\":[{\"id\":16640068878400,\"properties\":null,\"quantity\":2,\"variant_id\":16640068878400,\"key\":\"16640068878400:94cf8752e20f28a3f675ee10f8e5cc72\",\"title\":\"Compleu Abby - 60\",\"price\":19900,\"original_price\":19900,\"discounted_price\":19900,\"line_price\":398...
javascriptjsonobjectundefinedshopify

Answer №1

It is recommended to provide a callback function when making the request, as shown in the first example on the jQuery getJSON documentation, instead of assuming it's completed and utilizing the jqXHR object:

$(document).ready(function() {
  $.getJSON('/cart.js', function (data ) {
    console.log(data);
  });
});

If you want to learn more about asynchronous requests in Javascript, check out this helpful answer

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