React & CoinGecko API Troubleshooting

Dealing with 429 Error

So, about that 429 error—it’s such a pain, right? It usually means you’re hitting the API too frequently. They set limits, and we gotta respect that!

To manage rate limits, you might want to implement some kind of throttling. I think you can use lodash.debounce or lodash.throttle to help with that. They can limit how often your fetch function gets called. For example, you could set it to fetch data every minute, which sounds like what you’re trying to do!

import { throttle } from 'lodash';

const fetchData = throttle(() => {
  // Your fetch call here
}, 60000); // 1 minute in milliseconds

Handling CORS Errors

Ah, CORS errors! Those are the worst. If you try to call the API directly from your frontend, some APIs just won’t let you do it because of the same-origin policy. One way to get around this is to set up a proxy server.

You can use something like cors-anywhere in development. Just prepend your API requests with the proxy URL, like this:

const response = await fetch('https://cors-anywhere.herokuapp.com/YOUR_API_ENDPOINT');

But be careful with this in production! It’s generally better to have your backend handle the requests if you can. If you have a backend set up, you can create an endpoint on your server that calls the CoinGecko API, and your frontend can talk to your server instead.

Other Resources

For more help, checking out the official CoinGecko API documentation might clarify some details. Also, look into libraries like axios for easier request handling, and maybe express for creating a simple Node.js proxy.

If you run into more issues or find something that works, please share it! We’re all learning, and it’s awesome to help each other out.