Knowledge Builders

what is state in react native

by Dr. Jamarcus Sipes Published 2 years ago Updated 2 years ago
image

React Native AppState will provide you the following different App states:

  • active – The app is running in the foreground
  • background – The app is running in the background. ...
  • inactive – This is a state that occurs when transitioning between foreground & background, and during periods of inactivity such as entering the Multitasking view or in the event of ...

Full Answer

How to change state value in React Native?

React State

  • Creating the state Object
  • Using the state Object
  • Changing the state Object. To change a value in the state object, use the this.setState () method. ...

How good is React Native?

React Native – Pros/cons from the developers perspective

  • Hot Reload and Fast Refresh. React Native offers a Hot Reload feature that speeds up the development process by allowing you to immediately see the changes made on the application ...
  • Code reuse and ready-to-use components. ...
  • Large community. ...
  • Relatively complex UI. ...
  • Requires some experience. ...
  • Rely a lot on third-party libraries. ...

What are the weaknesses of React Native?

  • Doesn't use a WebView like a hybrid app
  • Uses native controls, so things like scrolling look and feel native because they are native
  • Has a separate thread for UI so that it runs fast

What is the best alternative to react native?

You can find more infos in the shared links:

  • Theming
  • Cross-platform support for Notch & Display Cutout
  • Files, Databases, Pdfs and Caching
  • Sensors
  • Connectivity (BLE, NFC, Sockets, etc.)
  • Charts
  • Native plugins for ads, in-app purchases, analytics, push notifications & Firebase
  • Gamification
  • Internationalization
  • Accessibility

image

Difference between State and Props

The state is mutable while props are immutable. This means that state can be updated in the future while props cannot be updated.

Using State

This is our root component. We are just importing Home which will be used in most of the chapters.

Updating State

Since state is mutable, we can update it by creating the deleteState function and call it using the onPress = {this.deleteText} event.

State in React Native

Let's understand this using an example, a button that is used to change the theme or background of an app into a dark or a light mode changes the state of style. Whenever we press that button, it changes the state to its opposite, if the light mode is active then clicking on the button will change the mode to dark mode.

Conclusion

In this tutorial, we covered what is state in react native and how we can use the state to change various values and hence update the react native components, using the setState () method.

React Native state Example 1

In this example, we create a Text component with state data. The content of Text component will be updated by clicking on it. The event onPress call the setState, and it updates the state "myState" text.

React Native state Example 2

Let's create another example of state data in which we interchange the Text value "Show" and "Hide" to show and hide the input password.

What is state in application?

It's defined as an object where we define key-value pairs specifying various data we want to track in the application.

What is react hook?

Using React Hooks we can use state and lifecycle methods inside functional components. React hooks are functional components with added state and lifecycle methods. So now, there is very little to no difference between class-based components and functional components. Both of them can have state and life cycle methods.

What is usestate hook?

The useState hook accepts a parameter which is the initial value of the state. In class-based components, state is always an object. But when using useState, you can provide any value as the initial value like a number, string, boolean, object, array, null, and so on.

Does react re-render?

So React does not re-render the component (and it's also a bad practice to directly update state ). Never ever directly update/mutate state in React, as it's a bad practice and it will cause issues in your application. Also, your component will not be re-rendered on state change if you make a direct state change.

What is a state object in react?

React components has a built-in state object. The state object is where you store property values that belongs to the component. When the state object changes, the component re-renders.

What is the setstate method in Java?

Always use the setState () method to change the state object, it will ensure that the component knows its been updated and calls the render () method ( and all the other life cycle methods).

image

Popular Posts:

  • 1. what type of landform is the nile river
  • 2. how do you propagate dieffenbachia
  • 3. what does it mean when your water leaves pink stains
  • 4. is coffee good for the garden
  • 5. what is the pipe operator in r
  • 6. how do i get my 1098 form online
  • 7. what is the comparative form of the adjective clean
  • 8. what war had the most cases of ptsd
  • 9. what causes tiny flies in house
  • 10. what are reducing substances in urine

    • 1.State · React Native

    Url:https://reactnative.dev/docs/state

    31 hours ago State. There are two types of data that control a component: props and state. props are set by the parent and they are fixed throughout the lifetime of a component. For data that is going to change, we have to use state. In general, you should initialize state in the constructor, and then call setState when you want to change it.

    Show details

    2.React Native - State - Tutorials Point

    Url:https://www.tutorialspoint.com/react_native/react_native_state.htm

    11 hours ago  · State is the place where the data comes from. We should always try to make our state as simple as possible and minimize the number of stateful components. If we have, for example, ten components that need data from the state, we should create one container component that will keep the state for all of them.

    Show details

    3.What is State in React Native? - Studytonight

    Url:https://www.studytonight.com/post/what-is-the-state-in-react-native

    18 hours ago The data inside React Components is managed by state and props. In this chapter, we will talk about state. Difference between State and Props. The state is mutable while props are immutable. This means that state can be updated in the future while props cannot be updated. Using State. This is our root component.

    Show details

    4.React Native State - javatpoint

    Url:https://www.javatpoint.com/react-native-state

    34 hours ago  · The state in react native is a property of a component that can be changed when an event occurs. In react native, there are two types of things that control components; props and state . The props are set only once while creating a component but for the data that may change , based on the user experience, we have to use state .

    Show details

    5.How State Works in React – Explained with Code Examples

    Url:https://www.freecodecamp.org/news/what-is-state-in-react-explained-with-examples/

    27 hours ago  · In React Native, for data that is going to change, we have to use state. You can think of it as a variable. It allows us to store data and also change it when we want. Whenever you define a state, you need to provide an initial value for it. After that, you can use setState function provided by React Native to change it whenever you want.

    Show details

    6.React State - W3Schools

    Url:https://www.w3schools.com/react/react_state.asp

    1 hours ago React Native State. There are two types of data state and props in React Native which control the component. The component that uses the state is mutable. They can be changed later on if required. The props component is immutable, and it is fixed throughout the lifetime.

    Show details

    7.Videos of What Is State In React Native

    Url:/videos/search?q=what+is+state+in+react+native&qpvt=what+is+state+in+react+native&FORM=VDRE

    36 hours ago  · State is like a data store to the ReactJS component. It is mostly used to update the component when user performed some action like clicking button , typing some text , pressing some key , etc. React. Component is the base class for all class based ReactJS components.

    Show details
    A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 1 2 3 4 5 6 7 8 9