👀 Views: 577 💬 Answers: 1 📅 Created: 2025-07-22

node.js axios error-handling async-await JavaScript

I'm dealing with I've been researching this but After trying multiple solutions online, I still can't figure this out... I'm relatively new to this, so bear with me. I'm working with a persistent scenario in my Node.js application when trying to access a nested property of an object that is constructed from data fetched via an API. The behavior I get is: `TypeError: want to read properties of undefined (reading 'someProperty')`. This happens when I attempt to access a property of an object that's expected to be populated with API data. Here’s a snippet of the code where the scenario occurs: ```javascript const axios = require('axios'); const fetchData = async () => { try { const response = await axios.get('https://api.example.com/data'); const nestedData = response.data.mainData.subData; // This line throws an behavior if subData is undefined. console.log(nestedData.someProperty); } catch (behavior) { console.behavior('behavior fetching data:', behavior); } }; fetchData(); ``` I've verified that the API endpoint works, and I can see that `response.data` has the structure I'm expecting when logged to the console, but it seems that at times `subData` is not present. I have tried adding a check before accessing the nested property: ```javascript if (response.data.mainData && response.data.mainData.subData) { console.log(response.data.mainData.subData.someProperty); } ``` However, the behavior still occurs intermittently, and I suspect it might be a timing scenario or something else related to the API response. I'm using Node.js version 16.13.0 and Axios version 0.21.1. Is there a better way to handle this situation, or could there be something wrong with how I'm accessing the data? Any insights would be appreciated. I'm working on a API that needs to handle this. I'm working with Javascript in a Docker container on Windows 11. Has anyone dealt with something similar? I've been using Javascript for about a year now.