When I am trying to update just “title”, it is working fine, but if I am trying to update the nested object in the array, it is not working. Data: Data Working: Not working: Answer Demo – https://mongoplayground.net/p/caFBz-lx8dQ Use $[] The filtered positional operator $[] identifies the ar…
Tag: react-native
How to get info from firebase firestore database in react-native
I am trying to get the logged-in user info from my firestore database in my react native app. I am new to react native, therefore I don’t know the correct syntax or methodology to do these things with firestore. I’ve read many documentations but they don’t provide information for every situa…
How to concat the object is useState array?
I have the useState varible. I want to concat the value with new object. rules: 1.If the date exist with isSelected flag then make as false otherwise, make as, my function below, expected output but I got this, Answer Replace your map code with this
Access Class Instance Props in React Component?
I have a class that only returns the children only And I created the Component in my JSX with text saying my Classes Prop “text” But it errors saying that Name.text doesn’t exist, Did you mean to access a static property? How do I use the JSX tag just to do new Name() then access the info in…
Align item to full parent’s width minus margin
How can I stretch my subview across 100% width of its parent, minus 20px margin on each side? In other words, I need it to fill the width of the parent, with 20px open on each side. I know in React-Native I can use width: ‘80%’ to make my subview’s width relative to that of its parent, but t…
Too many re-renders. React limits the number of renders to prevent an infinite loop | React Native
I am having following code: I am trying to call the setArticles causes the Too many re-renders. React limits the number of renders to prevent an infinite loop This error is located at: in App (created by ExpoRoot) in ExpoRoot (at renderApplication.js:45) in RCTView (at View.js:34) in View (at AppContainer.js:…
How Can I convert React.createclass to Class Component?
I have taken an example of dragging certain div in react js from here http://jsfiddle.net/Af9Jt/2/ Now it is in createClass and I need to convert it into class Draggable extends React.Component in order to export it into another component. Here is code APP.JS Draggable.js Everything runs fine in this code the…
Initialise helper class in a react functional component
The class methods which are passed as args from the functional component, are kept ‘in memory’ and doest not reflect the updated state. I can reinitialise on state changes but wish to avoid it. Answer You’ll need an additional ref to be able to use the latest values in an async callback. Eit…
How to add “new” element/objects s to a list in javascript?
Let’s say I have a List of objects in javascript. Now I make some API call and get more data like … I want to add the new objects i.e the sixth and seventh to my existing demoList and discard the existing object i.e. first object. How do I achieve this in javascript with less time complexity? No I…
TypeError: undefined is not an object (evaluating ‘availableMeals.filter’). I don’t why I am getting this error
I am using the useSelector() hook to pass state as a prop but I am getting an error saying: /store/reducers/meals.js: CategoryMealScreen.js: I don’t know why I am getting this error. Answer The issue is with your reducer , You are returning an action instead of state . Please change this to