I wanted to make a validation on the match of passwords with the following error: vue.runtime.esm.js?2b0e:619 [Vue warn]: Property or method “$v” is not defined on the instance but referenced during render. Make sure that this property is reactive, either in the data option, or for class-based com…
Executing a loop in React class component
I’m building a pagination component and I’m struggling to execute a for loop so I can dynamically generate the pages. I initially had a function component, but I want to switch it to a class component so I can manage state in it. (I know, I can use hooks, but Im practicing class components at the …
Why I can’t use ‘require’ built in module in node?
I’m trying to initialise a very simple server using node. As I understand ‘require’ and ‘HTTP’ are built-in modules which I can use. So my code looks as the following: const http = require(‘http’); …
Can I add property to object only if true in typescript?
I have an object: const options = {}; and I want to add fields base on another object. if they false I don’t want to add this key to the object. right now I write my code like this: const options = {}…
while updating class name of an element why “this” keyword is needed?
I’m referring to example // Get the container element var btnContainer = document.getElementById(“myDIV”); // Get all buttons with class=”btn” inside the container var btns = btnContainer….
Use scrollIntoView() and scroll to the bottom of the selected element
I have a list of chat messages inside a div and want to scroll to the bottom each time an element is added. I tried calling a function that selects the last item and uses scrollIntoView(). The issue is that it scrolls to the top of the selected element and not to the bottom of it which is needed in
change parent state from child
I want to change the parent state from the child but I can access the callback function just once Answer Try this:
Nested component does not render properly in Svelte/Sapper
I have three files inside a slug. I use slug parameters as directory name. The problem I am having is everything except the each loop in taglist. For some reason it does not receive the prop tagList. …
TypeError: Cannot read property ‘length’ of undefined, API TMDB
I am using the TMDB API which allows me to display movies in a list. I have my Add.js component which allows me to make a query and search for the movies and add them to my list But I get this error: TypeError: Cannot read property ‘length’ of undefined Add.js Answer The problem is happening at th…
Filtering, mapping and sorting documents in aggregation pipeline
Lets say I have an aggregation pipeline, and I am being able to get the required details as needed but I need to sort values of key named visits in descending order and then cherry pick items in it. Sample response Now, what I am looking for is to arrange the visits field in descending order based on _id. And