Error: Can’t set headers after they are sent to the client
Error: Can’t set headers after they are sent to the client
node.js
How do I convert an existing callback API to promises?
Promises have state, they start as pending and can settle to: fulfilled meaning that the computation completed successfully. rejected meaning that the computation failed. Promise returning functions should never throw, they should return rejections instead. Throwing from a promise returning function will force you to use both a } catch { and a .catch. People … Read more
Using async/await with a forEach loop
Sure the code does work, but I’m pretty sure it doesn’t do what you expect it to do. It just fires off multiple asynchronous calls, but the printFiles function does immediately return after that. Reading in sequence If you want to read the files in sequence, you cannot use forEach indeed. Just use a modern … Read more
Discord.js bots: organizing commands
If you want to better organize your command files, you can separate the commands with categories and then create a folder for each category inside the commands folder. for example: 📂commands ┣ 📂moderation â”— 📂fun After that you can loop through each of these new folders and load the command files inside them the same … Read more
Why do I get the ERROR: “No ‘Access-Control-Allow-Origin’ header present on the requested resource” although I specified the necessary header? [duplicate]
It’s been a long time since I used node, but just looking at the code, I think you need to remove the headers in your client request. Then make sure that these are added in your server response: Access-Control-Allow-Origin: https://example.com Access-Control-Allow-Credentials: true Check if the cors package in node does not already does this. You … Read more
PayPal REST SDK: Remove shipping address and payment authorization so it does go to pending state [closed]
In the Classic API there was a flag for NOSHIPPING you could include in your request that would disable shipping address requirements during checkout. I know it’s in REST somewhere, but I’m struggling to find it in the reference right now. Instead of “authorize” you should use “sale” for the intent parameter. Not sure what … Read more
Not able to take inputs from HTML form with Node Js
The Express API reference makes the following statement clear (emphasis mine): req.body Contains key-value pairs of data submitted in the request body. By default, it is undefined, and is populated when you use body-parsing middleware such as express.json() or express.urlencoded(). The code sample you posted does not make use of the middlewares the documentation makes … Read more