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:
Tag: json
Having trouble displaying object property
I’m building a small pokedex using PokeAPI. I’m retrieving data from an endpoint and building my own object. The function that I’ve built for the latter runs on page load as follows: I’m able to console log the object and traverse it in devtools, and also able to JSON stringify it and …
Array.filter() on object nested array not matching value correctly
I have Two Array with nested objects Now I want to filter out the arrOne in such a way that arrOne id is matched with arrTwo jobId Like this: But it returns [ ] empty array, although if I will rearrange arrTwo in such way like: it will return the matched value. so what’s the problem here & How to
how to convert a JSON API returns an object to an array for using .map()
I am trying redux-thunk for the first time Hence working on a simple project the thunk uses the API and displays the data on the screen but the API is returning a JSON object ,to display the titles on the screen I need to use the .map() function to map through the object, but the object doesn’t allow us…
How to group array of objects by certain prop and retain original object properties
I have an array of objects, these objects have a property that I want to group by. So my goal is to produce a new array of objects where they have all the same properties with an additional property that consolidates all the “value” properties into an array. Below is my input and desired output. H…
React – Error while rendering child component with prop passed from parent component
I have a problem while creating my react app. I’m fetching data from CoinGecko API to build a crypto tracking app, but when I pass the data prop from the parent App.js to the child Info.js. When I try to render the page it gives me Info.js:45 Uncaught TypeError: Cannot read properties of undefined (read…
charts.js displays only first x and y value from a json api response
I am trying to render a chart with charts.js with a json api but the rendered chart displays only the first x and y values from the json the json is fetched using xmlhttp json api link https://syed1ahmed.github.io/stage-gear/api.json Answer It seems that Chart.js does not recognize the thousands separators (,…
My generated link in the unordered list is not navigable
the javascript code renders the unordered list but the link in the list() is not navigable.Please advice on solving this issue. Answer There are multiple fixes so take a look at this
Why is my get request from a JSON online file won’t refresh at new render?
I’m doing the folloing request over a json file stored on an azure blob. I nested this function in a useEffect hook It’s working well as I can get the data and display it. My issue is that it’s never refreshing at page/component render. The only solution is to clear cache. How can I force th…
How to extract all arrays in json object
I have a json object which has a collection of countries. Each country can have multiple regions which are represented in an array. I want to get the regions only and put all regions into one list.However when I map the data it doesn’t put all the regions in a list. What am I missing here? Here is the c…