$http request blocked due to CORS policy
What is CORS? CORS stands for Cross-Origin Resource Sharing. It is a security mechanism implemented by web browsers to prevent malicious websites from accessing resources and data from another domain….
Tag: Fetch
Using JSON.parse() on an already parsed API response
Proper Handling of API Response Parsing A common mistake when working with API responses is double-parsing JSON data, which occurs when you call JSON.parse() on data that’s already been converted….
CORS issues due to incorrect API configuration
Solving CORS Issues in API Configuration Cross-Origin Resource Sharing (CORS) problems are among the most common challenges developers face when connecting frontend applications to APIs. These issues arise when the….
Forgetting to set headers in an API request
Properly Setting Headers in API Requests A common oversight when making API requests is forgetting to set necessary headers, which can lead to failed requests, CORS errors, or servers rejecting….
Using await inside a non-async function
Proper Usage of await in JavaScript Functions A common mistake in JavaScript and React development is trying to use await inside a function that isn’t marked as async, which results….
Accessing API response data before it loads (undefined errors)
Handling API Response Data Safely in React A common issue when working with asynchronous data fetching is attempting to access API response data before it’s actually loaded, resulting in “Cannot….
Not handling API failures leading to unhandled errors
Proper API Error Handling in React Applications A critical aspect of robust React development is properly handling API failures to prevent uncaught errors and provide a good user experience. The….
Not handling network errors in fetch/axios
Proper Network Error Handling in React Applications Handling network errors properly is crucial for creating robust React applications. Here’s how to implement comprehensive error handling for fetch and Axios requests…..
Writing Hooks with Abort Controller for Cleanup
In React, handling cleanup of side effects is essential to prevent memory leaks and ensure that resources like network requests, event listeners, or timers are properly cleaned up when a….
Mocking API Calls in Tests
When testing React components that rely on external data or API calls, it’s important to mock those API calls so that the tests are predictable, isolated, and run without relying….