This is my code And I created seperate button and passed the same function ‘viewPage’ as a handler. But When I clicked the button both are showing different results, the button I declared in table is giving me only initial state as output, but the other button is giving correct updated state. So I…
Tag: reactjs
Compare two Arrays and Insert Null Vallues
I have two arrays: And I would like for array2 to be changed to The question is how can I compare the two arrays and look at their time and then insert null in the missing locations for each array. Any help is appreciated! Answer Your example is a little misleading. Your description of the prompt says entries…
Django project not rendering React.js
In my project, I am trying to tie together Django and React. index.html index.js settings.py Project Hierarchy I have looked at this post, and confirmed that this solution is not applicable for me. The primary issue, I think, is that Django is serving the html, but not running the .js, so I’m unsure of …
React-Query useQuery is caching response
I have following code This function should be called when I visit my main page, but when returning to this route from another page this request is not triggered and I don’t get fresh data. What I want is this query to be called every time like useEffect Answer data from the cache is always returned if t…
How to get the correct state in an useEffect hook, after another useEffect hook modifies the same state?
I have two useEffect hooks, which will both run on change in startTime/endTime state. I understand from looking around that this is probably because React does some sort of batching for performance gain such that setState is async in nature. Also, the fetch call would be async too, so it will take time to set…
React email address format validation
I’m building a portal where students from only 6 universities can participate so I need a way to limit the email address type to these 6 universities for example emails ending with @mit.edu How do I implement this in React with the form validation set to characters and on clicking on of these formats fr…
How to do arrayUnion on an array of objects inside another array of objects in firebase firestore?
I have created a comment section in my react app. The comment section has following data structure in the firestore:- If I want to add a new comment I do this by: – Now, what I actually want to do is to do is to add a new reply to the existing comment. But I can’t find any way to
nextjs has some exclusive functionality for vercel only
I’m migrating all my applications to nextjs framework! and I would like to know, if all the functionality of nextjs is possible to replicate on private dockers servers or any type of jamstack itself or some functionality is limited only to the vercel platform Answer you can replicate all the functionali…
Argument of type ‘Date | null’ is not assignable to parameter of type ‘string’
I just don’t get it. I have this interface. and then I have this function: But I still get this error: What I do wrong then? And how to correct it? Thank you Answer I think the error you are getting here is quite explanatory, but I would try to explain better: Javascript’s Date.parse() method pars…
Local image show not show up in React JS
I’m just learning about React JS and Material UI to create a dynamic web application. I’m using ‘url(${process.env.PUBLIC_URL})’ to connect my local image but for unknown reason the image would not show up. As displayed above, I’m trying to place the water-bottle.jpg image inside…