Data.map is not a function error in reactjs
WebMar 30, 2024 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question.Provide details and share your research! But avoid …. Asking for help, clarification, or responding to other answers. WebApr 7, 2024 · React Hook Warnings for async function in useEffect: useEffect function must return a cleanup function or nothing 0 Toggling between an image grid and image slider with one array of images in react hooks
Data.map is not a function error in reactjs
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WebSep 30, 2024 · So, const data = await response.json(); After this line is executed the result we are getting inside the data constant is an Object. We can use MAP function only on … Web2 days ago · In the above code actually getDetails () and setCurrentIndex () are main functions that need to be executed to update the data. In getDetails () function the state currDetails gets updated which I need to use in setCurrentIndex () function. With the help of async, await I expect that flow will be as such. getDetails () -> setCurrentIndex () But ...
WebFeb 10, 2024 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question.Provide details and share your research! But avoid …. Asking for help, clarification, or responding to other answers. WebJul 30, 2024 · 1. I found out the problem that you are facing, the issue is when there is empty data from the API response the photos variable stays like photos = {} where in expected is photos = [], which you did in catch block but it never goes to catch block because having empty data is not error, also I have solved your issue here Demo. Share.
WebJul 24, 2024 · There are chances your API won't give data that time this will happen. You should handle 3 cases 1. loading 2. data map 3. Empty state. Here is a minimal example: WebThe useEffect hook takes an optional parameter and initializes the state variable to the supplied value.. The employees variable is set to an empty array initially and you can use the setEmployees function to update the state. # Convert array-like objects to an array If you have an array-like object, use the Array.from() method to convert it to an array …
WebAug 5, 2024 · 1. You try to iterate over the the object and not the array inside the object. You have to use products.data.map (...). Also I would recommend optional chaining on your products object because you will try to access .data before products is fully fetched from the server. Therefore your products object will be undefined at first and you can't ...
WebSep 27, 2016 · Approach 2: Set a default value for props.courses in mapStateToProps. function mapStateToProps (state,ownProps) { return { courses: state.courses [] }; } Approach 3: Check that this.props.courses is not undefined or null before rendering it: philipp carstensWebJul 20, 2024 · @John: Simply repeating that you think you're getting 6 records doesn't make it true. Again, what actual indication do you have of this? Can you show your entire API response here? Because the response you're showing in the question, once its syntax errors are corrected, contains only 2 records. – David philipp cavertWebOct 31, 2024 · At the first render, your categories array is an empty array. So you are doing something like this: [].map (item => {item.name} ) when there is no item in the array, using dot notation to get the item value will cause an issue. There are two options for you: add a default value at initializing phase on setState, for example: philipp cachee berlinWebApr 9, 2024 · Redux store value is not updating in another component. I am creating a react app and for state management. When dispatch is called, it works fine and updating the value in the component. But the value is an empty array (may be initial state) in other components, when I tried to use it. It seems like the store value is updated but it is only ... philipp caba rechtsanwaltWebHow would I get the "data" fields (more specifically the modified_date) in the .map function? Edit: I can log the modified_date by calling data.games.modified_date but, when trying to set the state of data: this.state.data = data.games.game I receive a new warning: Each child in an array or iterator should have a unique "key" prop. Check the ... truist q3 earningsWebSep 7, 2016 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question.Provide details and share your research! But avoid …. Asking for help, clarification, or responding to other answers. philipp cermakWebSep 18, 2024 · I think the problem here is that alarmService.getData is asynchronous and you are not dealing properly with that. That's why you get Promise pending, and you can not map over posts. useEffect(() => { const alarmService = new AlarmService(); alarmService.getData().then(response => response.json()).then(data =>setPosts(data)) … philipp cede