I want to use JS to display an error message as a placeholder in the Notes <textarea> if the Broken radio button is selected and the <textarea> is empty. I can successfully select my radio buttons via classname and use a for loop to iterate through them. I’m trying to check the associated &l…
Tag: error-handling
Why does node.js give me a parsing error even when I’m not trying to parse?
I’m somehow getting this error: And I don’t know why… Could anyone explain what this error means or tell me the error in my code? Thanks! Thanks! Please note that the vote variable is in json format similar to this: { user: ‘607341305994936320’, type: ‘test’, query: &…
What is the difference between throw Error(error) and throw error
What is the difference between: and Also Is the second one necessary? It seems like you are just wrapping an error with an Error Object. Which one is preferred? Please help me understand. Answer It’s possible that the value that the Promise rejected with was not an error object, but something else: Doin…
POST net::ERR_NAME_NOT_RESOLVED
I’m trying to create a simple web application form. It requires the user to input their information, and click submit which ideally would hit an api and store the information somewhere like dynamodb. I have this code which is returning a response error POST net::ERR_NAME_NOT_RESOLVED For the life of me,…
Uncaught Reference Error: (function) is not defined JAVASCRIPT
This is the code and it says that the function inside both objects is not defined. As I said, It brings an error that reads: error: Uncaught ReferenceError: calcBMI is not defined Answer When you defining an object, you can’t execute a function that is being defined in the object. In your case you shoul…
When and why is it good to create custom exceptions?
I am working on a complex application with different types of errors, services, and domain concepts. In order to throw “object” errors, there are two different approaches that come to my mind: Applying Object.assign() to an Error object (easy option if I just need to throw a single or a couple of …
Firebase – How to extend FirebaseError?
I am implementing a cloud function for signing up with unique username and password. In order to throw exceptions, I was previously doing the following: signUpValidation.js signUp.function.js But, I don’t really like this way of throwing the exceptions in the signUpValidation module… it makes more…
Error handling inside addEventListener callback
How do developers structure their programs if they want to have a top-level error handling function? The immediate thought that came into my mind was to wrap a try..catch to the main function, however, this does not trigger errors from callbacks? Answer In javascript you can override global onerror, catching …
TypeError: cb is not a function in nodejs?
(node:13384) UnhandledPromiseRejectionWarning: TypeError: cb is not a function I am using passport js for authentication for my website, I am able to get all routes but when I try to sign up that is post router so in the console I am seeing these err, my data saved in DB but after posting my page loading cont…
How to fix this “Syntax error:Unexpected identifier”?
I am trying to make an js contact app program that has to save a Contact number and phone and I get this error “Unexpected identifier at line 61”. I don’t know where seems to be the ending point, how can I solve this? Here is my code: Also I get this error too when I try to save the