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Tag: reactjs

Error React createElement type is invalid expected a string for built-in components or a class function for composite components but got object

I am trying to change my client side rendered react app to be rendered on server side. I am using React with TypeScript. Here is the error: Here is my package.json dependencies: And here is my rendered.js class where the error seems to be triggered: And here is my index.tsx file: I’ve tried changing the imports of App.tsx although it

How can I sort and operate on unique key values

I want to iterate though an array of different ratings, sort by each unique id, sum and calculate the average of each id’s ratings. Then save the averages in a new array, where I can call something like averageRating[i], where each entry will be each id’s rating. The original array of objects looks like this, where id could be any

return a string from a function in reactjs

I’m trying to return a string from a function this is the function : But it returned undefined, although when I log it to the console it gives the value that I expect. I thought about creating a state, but I can’t because I’m going to call this function several times and I don’t think I can make a state

Avoid white space between footer and content

Each page of my site has a footer (one for all pages), it has the parameter position: ‘fixed’. Accordingly, this means that the footer is always attached to the bottom of the browser, regardless of the screen size and information on the page. There is also a table on several pages of the site. The problem is that sometimes a

How do I apply scroll bar on div?

I am trying to show the scrollbar beside the items in div but could not do it. This is my code. I tried to add style={{overflowY: “scroll”}} in the div, but it is showing the scroll bar against each item, I want a singe scroll bar for every item in the div. Like this: Answer You would need to apply

Update Select When New Category Added

hi guys i want to update select options when user add new category can anyone tell me how to do this ? i want to update option with new item added in this part of code Answer If you want React re-render your component when new category added, add local state to it. Here is the updated code:

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