For context, I’m just learning JS. On my web-page, I want to have the option to create new range-inputs that are interactive. I also want to use the values of the ranges for an equation. Right now, I can add the ranges themselves fine, and they work, but the values of each range returns as undefined. I …
Propper way of Error handling in a nodejs API server
I need to handle errors in my API server on node.js. I created a error handling module, which sends the errors (only in dev mode) to the API client in a JSON object similar to this: now the problem I have is, that I need to create a new error in a submodule of my API controller when no case
unable to add a border to popup modal
I am using a Popup modal component from the reactjs-popup library. This is how it looks like: I want to add a thick black border to the popup component. How can I do so? My current css doesnt seem to work. Answer You need to set border-style: solid; the default is none. (maybe border-width too)
How can I recurse in JS to repeat a string n times?
I am trying to make the code below repeat string s n number of times, however, it will always repeat n – 1 times, because I need to pass a decrement to exit the recursion or I will exceed the max call stack. What can I change to make it recurse correctly? Answer Recursion involves making a function call…
TypeScript – Type ‘boolean’ does not satisfy the constraint of a type that returns a boolean
I have a TypeScript class that manages a cache of objects. It has a get method that takes an item’s ID, and an optional boolean for whether or not an API should be called to fetch the object if it isn’t already cached. If the boolean parameter is false or undefined, the method should return Cached…
Class import produces undefined
I’m working on a Vue app and trying to build some helper classes: file a.js: file b.js: file c.js: When I import Middle it is undefined and giving me Uncaught TypeError: Super expression must either be null or a function on the line of extends Middle I’ve also tried Which should not make a differe…
Antd: How to change tooltip label on table sorter
I’m new using Antd, I’ve create a table with sort functionalities, but I need to change the text on the tooltip of the sorter. Sorter tooltip:- Thanks in advance, if you need any extra code snippet just please let me know. Answer I was able to solve it this way: The trick is to use the showSorterT…
scrollToIndex out of range: request index1 but maximum is -1 .. React Native
when I run my application it’s okay and work If I create an array and put it in the data in FlatList like this array But when I replace the photos array with an API, The app doesn’t work. I tried more than API, I think the error is in my code not in the API, This error appears to
Setting state to be the value of the label of a radio button
I have a list of radio buttons that in a form. What I am trying to do is have the Breed variable set to the value of whatever checkbox is selected. The problem is I am getting on for the value instead of what the label says. I cannot change the radio button’s name attribute because I need only one
What value does a substring have if it doesn’t exist?
I have a string, msg. I want to check if the third character in the string exists or not. I’ve tried if (msg.substring(3, 4) == undefined) { … } but this doesn’t work. What would the substring be equal to if it does not exist? Answer The third character of the string exists if the string has…