I'm trying to update a component after receiving props from redux using componentWillReceiveProps. On the next instance that props are sent to the component by redux componentWillReceiveProps does not fire a second time. Any idea why this is happening and the best lifecycle component to use in such a situation?.
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I am using functional components and have implemented the following workflow using React Native. I have a parent component that retrieves the current location via a custom hook (using the useState and useEffect hooks) and has registered watchPositionAsync. The location is updated on the parent component. On the parent component, I use a FlatList with onPress that navigates to the next screen as a child component with some props. One of them is the "updated" location.
When I click on the list item, the current location is sent to the child component.
Now the location changes by the listener, but the updated location will only be sent to the parent component and not to the child component. How do I have to use hooks to register the updated location at the child?
The implementation is a bit like on http://5.9.10.113/67799305/how-to-add-clickable-flatlist-item-and-navigate-to-detail-component-in-react-nat
just with a dynamic url from the home component as a prop of Detail.
you can use the redux or the context api. here is the simple solution has already been answered here.
I have put console log inside of my functional component file. In this file render whenever the API called. If I called API in some other file and the API not related to that file still got logs. I am not sure why. I have checked useEffect and usestate but no clue. Even search from google no clue.
I am using Usestate to store and useEffect to reloaded the the page when data change
I am using apisauce to call the API
React native navigation bottomtab to navigate the screen
Using React.memo but still page rendered.
Any one please help me to resolve this issue. because I am new to react native.
React components automatically re-render whenever there is a change in their state or props. A simple update of the state, from anywhere in the code, causes all the User Interface (UI) elements to be re-rendered automatically.
However, there may be cases where the render() method depends on some other data. After the initial mounting of components, a re-render will occur when:
A component’s setState() method is called.
A component’s forceUpdate() method is called.
Warning: You should normally try to avoid all uses of forceUpdate() and only read from this.props and this.state in render().
I'm looking for a way to have a global component, so that my webview in it wont reset every time i switch over with Router to that parent's component.
Any ways to make save webviews data with redux so it won't reset each time, or a global component?
How to pass props from one page to another without using navigation props?
Values can be passed by navigation props but without that how to do so?
This is a very broad question, but I will attempt an answer. The answer of course is, it depends. If you do not want to use navigation, then I recommend you lift up the state. In other words, place the the props to want to pass between screens in the state of a component that is the parent of both screens. The parent component can set the props of its children based on the state. You can use callback props on the children to set the parent components' state.
Another way to lift up the state and share data between components is to use a global state manager such as Redux. This allows you to have any component set the global state and have any component take in portions of the global state as props.
Either of these options will allow you to pass data between components.
I have a react native component which is connected to the store, whenever there is an update to the store, render method is invoked.
I want to know whether render finished rendering the page.
I tried componentDidUpdate() but is getting invoked for every update from the redux store.
componentDidMount will be called after the first initial render.
componentDidUpdate will be called after all other renders.
See here under lifecycle.