I am using React Js and I would like to perform a subtract time in JavaScript with moment library. I tried my code as follows: The above code was my timecheck function, I would like to perform time3 = time1 – time2, it console log as InvalidDate May I know where is my syntax error? Answer You can simply…
Tag: reactjs
Module build failed (from ./node_modules/mini-css-extract-plugin/dist/loader.js): ReferenceError: document is not defined
Ok, So basically We use webpack to bundle our resources before deployment. However, now we want to also bundle our sass files through webpack is it simplifies our build process.it was going well, but now bundle.js is too big to deploy on production so I wanted to split bundle.js and styling files. I don’…
npm related tasks are throwing errors during installations
I’ve been having this problem recently that nothing related to npm is working for me except npm start. npm install is giving this error: npx create-react-app ./ is giving this error: EDIT: So I tried using Yarn for my installs but got this error: How do I fix this? Edit: My version of npm is 6.14.8 Answ…
Best practice for Next.js data fetching inside a component
I have a menu component that appears globally. What is the best practice for getting data into that component? I’m trying to take advantage of static generation that Next.js offers but all data fetching guidance from the Next.js team relates to pages. getStaticProps and getStaticPaths seem to pertain to…
reactjs setstate not working in function that has .map
Good Morning. Need help, i have the below script, the thing is the setState is not working, I think I’m missing something here? or Am i doing wrong. the “return” in the below is inside “.map” so i could display the 3 file in the array. Thanks Answer I imagine you want to recreate…
How to insert properties and functions inside ref?
How can I insert properties and functions inside a ref? Like this example: Then I want to use the propertie loading and the function onTest that way: How can I do that? Answer You cannot set ref on functional components because they don’t have an instance. You may not use the ref attribute on function c…
Switch between two external css files in react
I want to apply an option where user can switch between dark mode and light mode in the application. I have two sheets for the whole website. I have given the option but what do i have to do to switch between the two css files? I used this method and it is updating the link tag perfectly in the
How to cancel all subscriptions inside UseEffect in React
I am getting this error – Can’t perform a React state update on an unmounted component. This is a no-op, but it indicates a memory leak in your application. To fix, cancel all subscriptions and asynchronous tasks in a useEffect cleanup function. Here’s my useEffect hook, I used a ref called …
Lodash throttle firing multiple times
I am using lodash throttle like this I need to trigger this upon a certain notification event I am getting from a ws. So the idea was, if I get 10 notifications at almost the same time, to have the fetch function fire only once at the wait of 10 seconds. Instead, what is happening is that the fetch functions
React-codemirror 2 linting feature not working
I have created a react-codemirror 2 component in my react app but the linting feature of the package is not working. I tried browsing other stack overflow questions but since the questions are at least 2 years old it looks like the file structure for the original library i.e. codemirror has been changed and n…