👀 Views: 1459 💬 Answers: 1 📅 Created: 2025-06-13

javascript json async JavaScript

I'm attempting to set up I'm working on a project where I need to parse a nested JSON object that has dynamic keys..... The structure looks something like this: ```json { "user": { "id": 123, "name": "John Doe", "preferences": { "theme": "dark", "notifications": true } }, "posts": [ { "id": 1, "content": "Hello World!", "comments": { "count": 2, "details": [ { "id": 1, "text": "Nice post!" }, { "id": 2, "text": "Thanks for sharing!" } ] } } ] } ``` When I try to access the `theme` preference in my code like this: ```javascript const jsonData = //... (fetching the JSON data) const userTheme = jsonData.user.preferences.theme; console.log(userTheme); ``` I'm expecting to get "dark" as the output, but instead, I'm seeing `undefined`. I've already confirmed that the JSON structure is correct. To troubleshoot, I used `console.log(jsonData)` to ensure that the data is being fetched properly and appears complete. The entire object seems fine when logged, but for some reason, accessing `preferences` directly gives me `undefined`. I also tried using optional chaining like this: ```javascript const userTheme = jsonData?.user?.preferences?.theme; ``` But that only avoids the behavior and still returns `undefined`. I suspect there might be an scenario with how I’m fetching or constructing the JSON object, but I can’t pinpoint the question. Is there something I might be overlooking in terms of asynchronous data fetching or object structure? I'm using JavaScript ES2020 features and fetching the data using `fetch` API. Any help would be appreciated! I'd really appreciate any guidance on this. I recently upgraded to Javascript 3.10. I'd really appreciate any guidance on this. The project is a web app built with Javascript. Thanks for your help in advance! The stack includes Javascript and several other technologies.