I have a div that has scrolling enabled for that div. I have some elements in it, when the user starts to scroll I want an element to disappear and when scrolling stops I want it to show up again. How can I do this Answer There is not real scrolling state in the browser; the scrolling event occurs, and
Tag: reactjs
React useState hook event handler using initial state
I’m still getting my head around react hooks but struggling to see what I’m doing wrong here. I have a component for resizing panels, onmousedown of an edge I update a value on state then have an event handler for mousemove which uses this value however it doesn’t seem to be updating after t…
Setting state of nested array with React Hooks
I have been working with React Hooks for a while, but the biggest problem for me is working with arrays. I am making a register form for teams. Teams have players (array of strings). The user should be able to add a team, and for each team, an input is shown with the current members in the team displayed abov…
MIME type (‘text/html’) is not a supported stylesheet MIME type
I have tried almost every solution for the problem which includes. giving type for <link rel=”stylesheet” href=”./style.css” /> use of app.use(express.static(‘public’)) and many more but it seems I am not able to find a solution for this. index.js : index.html : webPa…
What’s the purpose of using classes in React?
I mostly see JavaScript use classes as a constructor as following: What’s the reason React uses classes without using the contructor() function, such as following? I don’t see classes being used to create instances. Answer What’s the reason React uses classes without using the contructor() f…
How to use the GraphQL Get query from aws in React
I’m trying to make use of the getquery for graphql in react.js. But I can’t figure out how to go about doing this. I already succeeded to use the list query. How does one go about using the get query? Thanks! Answer You need an ID to retrieve an item with any get query. getPatient(id:”YOUR I…
Node error Cannot read property ‘resolve’ of undefined
I am using reactjs and am unable to install any packages using npm install. The error message I’m getting is : When I do npm install -verbose: I am not even able to uninstall npm and reinstall it as I am getting the same error when I try to uninstall. What is the issue here and how do I fix
How to avoid the ‘no-param-reassign’ rule with a input’s handleChange?
I’m working to build a React Textarea that auto grows/shrinks as the user types. I’ve built my component inspired by this codepen: https://codepen.io/Libor_G/pen/eyzwOx While I have this working nicely, I’m getting an es-lint error I’m unsure how to correctly resolve. eslint is not lik…
React useEffect causing: Can’t perform a React state update on an unmounted component
When fetching data I’m getting: Can’t perform a React state update on an unmounted component. The app still works, but react is suggesting I might be causing a memory leak. This is a no-op, but it indicates a memory leak in your application. To fix, cancel all subscriptions and asynchronous tasks …
Function lacks ending return statement and return type does not include ‘undefined’
Function lacks ending return statement and return type does not include ‘undefined’. In the following async await function I had return type of Promise: <any> but I wanted to correct that so I did the following: However that creates the error above. Where getMarkets is called: What is/are th…