#cors Development Tutorials & Tips | Roast Dev

How to Fix CORS Error in Angular

Are you running into the No Access-Control-Allow-Origin error while working on your Angular project? You’re not alone. In this guide, you’ll learn clear, step-by-step methods to fix the CORS error...

12.03.2025 0 Read More

Simple vs. Preflighted Requests in CORS: What Developers Need to Know

TL;DR: Simple requests: sent directly, response blocked if CORS headers are missing. Preflighted requests: OPTIONS first, then the real request if allowed. HTML forms are why simple requests...

06.05.2025 0 Read More

How to Fetch Files From a GitHub Release (Without CORS Errors)

You’re building a web app and need to grab a ZIP or PNG straight from a GitHub release. You send a fetch() from the browser, but run into a CORS error. Let’s see why that happens and how you can f...

06.05.2025 0 Read More

How to Fix CORS Error in Vue.js

Are you running into the No Access-Control-Allow-Origin error while working on your Vue.js project? You’re not alone. In this guide, you’ll learn clear, step-by-step methods to fix the CORS error ...

13.03.2025 0 Read More

CORS Tester - Test CORS Online

I'm excited to introduce CORS Tester, a handy tool built to help you quickly test whether any URL for CORS support. If you've ever struggled with CORS, then this tool is for you. Why CORS Test...

19.03.2025 0 Read More

Calling Swiggy API

Swiggy is a popular food delivery platform, and while its API isn’t officially documented, many developers want to use its data for building fun apps. You might have noticed that even though you can...

07.04.2025 0 Read More

Fixing Figma Plugin Unable to Hit API Due to CORS Error

When you’re building a Figma plugin, you might notice that making API calls isn’t as straightforward as it is on a regular website. If you’ve run into CORS errors, you’re not alone. In this ar...

08.04.2025 0 Read More

Trying to use fetch and pass in mode: no-cors (Solution Explained)

Fetching data from client-side JavaScript isn’t as trivial as it seems. Although it works in Postman, using mode: 'no-cors' in your code won’t disable CORS and leaves you with an opaque response. ...

10.04.2025 0 Read More

Understanding CORS: Why It Matters and How to Implement It in Node.js and FastAPI

Hey devs 👋! Have you ever built a frontend that talks to a backend API, and everything works locally... but suddenly, when deployed, the browser screams at you with: Access to fetch at 'https://you...

10.04.2025 0 Read More

Why does my JavaScript code receive a "No Access-Control-Allow-Origin" error, while Postman does not? (Solution Explained)

You’re testing an API with Postman and everything works fine, but when you switch to your JavaScript client, you suddenly hit CORS error. Frustrating, right? This article breaks down why this happen...

14.04.2025 0 Read More