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.
For example, let's say we want to make text that blinks all the time. The text itself gets set once when the blinking component gets created, so the text itself is a prop. The "whether the text is currently on or off" changes over time, so that should be kept in state.
import React, { Component } from 'react';
+import React, { useState, useEffect } from 'react';
import { Text, View } from 'react-native';
-class Blink extends Component {
+const Blink = (props) => {
+ const [isShowingText, setIsShowingText] = useState(true);
- componentDidMount(){
- // Toggle the state every second
- setInterval(() => (
- this.setState(previousState => (
- { isShowingText: !previousState.isShowingText }
- ))
- ), 1000);
+ useEffect(() => {
+ const toggle = setInterval(() => {
+ setIsShowingText(!isShowingText);
+ }, 1000);
+
+ return () => clearInterval(toggle);
+ })
+
+ if (!isShowingText) {
+ return null;
}
- //state object
- state = { isShowingText: true };
-
- render() {
- if (!this.state.isShowingText) {
- return null;
- }
-
- return (
- <Text>{this.props.text}</Text>
- );
- }
+ return <Text>{props.text}</Text>;
}
-export default class BlinkApp extends Component {
- render() {
- return (
- <View>
- <Blink text='I love to blink' />
- <Blink text='Yes blinking is so great' />
- <Blink text='Why did they ever take this out of HTML' />
- <Blink text='Look at me look at me look at me' />
- </View>
- );
- }
+export default function BlinkApp() {
+ return (
+ <View style={{marginTop: 50}}>
+ <Blink text='I love to blink' />
+ <Blink text='Yes blinking is so great' />
+ <Blink text='Why did they ever take this out of HTML' />
+ <Blink text='Look at me look at me look at me' />
+ </View>
+ );
}
EditState
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.
For example, let's say we want to make text that blinks all the time. The text itself gets set once when the blinking component gets created, so the text itself is a prop. The "whether the text is currently on or off" changes over time, so that should be kept in state.
-import React, { Component } from 'react';
+import React, { useState, useEffect } from 'react';
import { Text, View } from 'react-native';
-class Blink extends Component {
+const Blink = (props) => {
+ const [isShowingText, setIsShowingText] = useState(true);
- componentDidMount(){
- // Toggle the state every second
- setInterval(() => (
- this.setState(previousState => (
- { isShowingText: !previousState.isShowingText }
- ))
- ), 1000);
+ useEffect(() => {
+ const toggle = setInterval(() => {
+ setIsShowingText(!isShowingText);
+ }, 1000);
+
+ return () => clearInterval(toggle);
+ })
+
+ if (!isShowingText) {
+ return null;
}
- //state object
- state = { isShowingText: true };
-
- render() {
- if (!this.state.isShowingText) {
- return null;
- }
-
- return (
- <Text>{this.props.text}</Text>
- );
- }
+ return <Text>{props.text}</Text>;
}
-export default class BlinkApp extends Component {
- render() {
- return (
- <View>
- <Blink text='I love to blink' />
- <Blink text='Yes blinking is so great' />
- <Blink text='Why did they ever take this out of HTML' />
- <Blink text='Look at me look at me look at me' />
- </View>
- );
- }
+export default function BlinkApp() {
+ return (
+ <View style={{marginTop: 50}}>
+ <Blink text='I love to blink' />
+ <Blink text='Yes blinking is so great' />
+ <Blink text='Why did they ever take this out of HTML' />
+ <Blink text='Look at me look at me look at me' />
+ </View>
+ );
}
The React Native Community
There are a lot of developers around the world using React Native. This is a brief overview of where you can find them.
Where To Get Help
If you need help with your React Native app, the right place to go depends on the type of help that you need.
Repository
The core of React Native is worked on full-time by Facebook's React Native team. But there are far more people in the community who make key contributions and fix things. If the issue you are facing is code related, you should consider checking the open issues in the main repository. If you cannot find an existing issue, please use the Bug Report template to create an issue with a minimal example.
Stack Overflow
Many members of the community use Stack Overflow to ask questions. Read through the existing questions tagged with react-native or ask your own!
Staying up to date
Official channels
The React Twitter account covers both React and React Native. Follow the React Native Twitter account and blog to find out what's happening in the world of React Native.
Proposals
React Native is still a young framework, and its rapid release cycle leaves the door open for discussing how it can evolve at every step of the way. If you want to know what the current proposals and RFCs are talking about, you can read through the Discussions and Proposals repository.
Conferences
There are a lot of React Native Meetups that happen around the world. Often there is React Native content in React meetups as well. React Native has been covered often in past React Conf talks. Videos for these talks can be found online in the following playlists: React Conf 2018, React Conf 2017, React Conf 2016, and React Conf 2015. The next React Conf will take place October 24 and 25 in Henderson, Nevada. You can also find a list of dedicated React Native conferences here.
React Native Show
The React Native Show is a video series from the React Native team covering updates to React Native:
Communities
Reactiflux Chat
If you need an answer right away, check out the Reactiflux Discord community. There are usually a number of React Native experts there who can help out or point you to somewhere you might want to look.
Forum-like groups
If you want to create less temporary conversations, check out the React Native Spectrum community or the React Native Facebook Group, which is more focused on post announcements, blog posts, talks, videos, cool new libraries, and apps. The Expo Forums are a good place to get help if you are using Expo.
Company-based Communities
Some companies actively involved in the React Native have also their own communication channels focused towards the projects they maintain, like Callstack.io's Discord server, Invertase.io's Discord server (e.g. React Native Firebase), Infinite Red's Slack Group and The Expo Slack Group.
Content sharing
DevTo community's and Medium's React Native tag are places where you can share React Native projects, articles and tutorials as well as start discussions and ask for feedback on React Native related topics. (but remember to give some love to the main documentation too!)
The React Native Community
There are a lot of developers around the world using React Native. This is a brief overview of where you can find them.
Where To Get Help
If you need help with your React Native app, the right place to go depends on the type of help that you need.
Repository
The core of React Native is worked on full-time by Facebook's React Native team. But there are far more people in the community who make key contributions and fix things. If the issue you are facing is code related, you should consider checking the open issues in the main repository. If you cannot find an existing issue, please use the Bug Report template to create an issue with a minimal example.
Stack Overflow
Many members of the community use Stack Overflow to ask questions. Read through the existing questions tagged with react-native or ask your own!
Staying up to date
Official channels
The React Twitter account covers both React and React Native. Follow the React Native Twitter account and blog to find out what's happening in the world of React Native.
Proposals
React Native is still a young framework, and its rapid release cycle leaves the door open for discussing how it can evolve at every step of the way. If you want to know what the current proposals and RFCs are talking about, you can read through the Discussions and Proposals repository.
Conferences
There are a lot of React Native Meetups that happen around the world. Often there is React Native content in React meetups as well. React Native has been covered often in past React Conf talks. Videos for these talks can be found online in the following playlists: React Conf 2019, React Conf 2018, React Conf 2017, React Conf 2016, and React Conf 2015. The next React Conf is yet to be announced. You can also find a list of dedicated React Native conferences here.
React Native Show
The React Native Show is a video series from the React Native team covering updates to React Native:
Communities
Reactiflux Chat
If you need an answer right away, check out the Reactiflux Discord community. There are usually a number of React Native experts there who can help out or point you to somewhere you might want to look.
Forum-like groups
If you want to create less temporary conversations, check out the React Native Spectrum community or the React Native Facebook Group, which is more focused on post announcements, blog posts, talks, videos, cool new libraries, and apps. The Expo Forums are a good place to get help if you are using Expo.
Company-based Communities
Some companies actively involved in the React Native have also their own communication channels focused towards the projects they maintain, like Callstack.io's Discord server, Invertase.io's Discord server (e.g. React Native Firebase), Infinite Red's Slack Group and The Expo Slack Group.
Content sharing
DevTo community's and Medium's React Native tag are places where you can share React Native projects, articles and tutorials as well as start discussions and ask for feedback on React Native related topics. (but remember to give some love to the main documentation too!)
The React Native Community
There are a lot of developers around the world using React Native. This is a brief overview of where you can find them.
Where To Get Help
If you need help with your React Native app, the right place to go depends on the type of help that you need.
Repository
The core of React Native is worked on full-time by Facebook's React Native team. But there are far more people in the community who make key contributions and fix things. If the issue you are facing is code related, you should consider checking the open issues in the main repository. If you cannot find an existing issue, please use the Bug Report template to create an issue with a minimal example.
Stack Overflow
Many members of the community use Stack Overflow to ask questions. Read through the existing questions tagged with react-native or ask your own!
Staying up to date
Official channels
The React Twitter account covers both React and React Native. Follow the React Native Twitter account and blog to find out what's happening in the world of React Native.
Proposals
React Native is still a young framework, and its rapid release cycle leaves the door open for discussing how it can evolve at every step of the way. If you want to know what the current proposals and RFCs are talking about, you can read through the Discussions and Proposals repository.
Conferences
There are a lot of React Native Meetups that happen around the world. Often there is React Native content in React meetups as well. React Native has been covered often in past React Conf talks. Videos for these talks can be found online in the following playlists: React Conf 2018, React Conf 2017, React Conf 2016, and React Conf 2015. The next React Conf will take place October 24 and 25 in Henderson, Nevada. You can also find a list of dedicated React Native conferences here.
React Native Show
The React Native Show is a video series from the React Native team covering updates to React Native:
Communities
Reactiflux Chat
If you need an answer right away, check out the Reactiflux Discord community. There are usually a number of React Native experts there who can help out or point you to somewhere you might want to look.
Forum-like groups
If you want to create less temporary conversations, check out the React Native Spectrum community or the React Native Facebook Group, which is more focused on post announcements, blog posts, talks, videos, cool new libraries, and apps. The Expo Forums are a good place to get help if you are using Expo.
Company-based Communities
Some companies actively involved in the React Native have also their own communication channels focused towards the projects they maintain, like Callstack.io's Discord server, Invertase.io's Discord server (e.g. React Native Firebase), Infinite Red's Slack Group and The Expo Slack Group.
Content sharing
DevTo community's and Medium's React Native tag are places where you can share React Native projects, articles and tutorials as well as start discussions and ask for feedback on React Native related topics. (but remember to give some love to the main documentation too!)
The React Native Community
There are a lot of developers around the world using React Native. This is a brief overview of where you can find them.
Where To Get Help
If you need help with your React Native app, the right place to go depends on the type of help that you need.
Repository
The core of React Native is worked on full-time by Facebook's React Native team. But there are far more people in the community who make key contributions and fix things. If the issue you are facing is code related, you should consider checking the open issues in the main repository. If you cannot find an existing issue, please use the Bug Report template to create an issue with a minimal example.
Stack Overflow
Many members of the community use Stack Overflow to ask questions. Read through the existing questions tagged with react-native or ask your own!
Staying up to date
Official channels
The React Twitter account covers both React and React Native. Follow the React Native Twitter account and blog to find out what's happening in the world of React Native.
Proposals
React Native is still a young framework, and its rapid release cycle leaves the door open for discussing how it can evolve at every step of the way. If you want to know what the current proposals and RFCs are talking about, you can read through the Discussions and Proposals repository.
Conferences
There are a lot of React Native Meetups that happen around the world. Often there is React Native content in React meetups as well. React Native has been covered often in past React Conf talks. Videos for these talks can be found online in the following playlists: React Conf 2019, React Conf 2018, React Conf 2017, React Conf 2016, and React Conf 2015. The next React Conf is yet to be announced. You can also find a list of dedicated React Native conferences here.
React Native Show
The React Native Show is a video series from the React Native team covering updates to React Native:
Communities
Reactiflux Chat
If you need an answer right away, check out the Reactiflux Discord community. There are usually a number of React Native experts there who can help out or point you to somewhere you might want to look.
Forum-like groups
If you want to create less temporary conversations, check out the React Native Spectrum community or the React Native Facebook Group, which is more focused on post announcements, blog posts, talks, videos, cool new libraries, and apps. The Expo Forums are a good place to get help if you are using Expo.
Company-based Communities
Some companies actively involved in the React Native have also their own communication channels focused towards the projects they maintain, like Callstack.io's Discord server, Invertase.io's Discord server (e.g. React Native Firebase), Infinite Red's Slack Group and The Expo Slack Group.
Content sharing
DevTo community's and Medium's React Native tag are places where you can share React Native projects, articles and tutorials as well as start discussions and ask for feedback on React Native related topics. (but remember to give some love to the main documentation too!)
The React Native Community
There are a lot of developers around the world using React Native. This is a brief overview of where you can find them.
Where To Get Help
If you need help with your React Native app, the right place to go depends on the type of help that you need.
Repository
The core of React Native is worked on full-time by Facebook's React Native team. But there are far more people in the community who make key contributions and fix things. If the issue you are facing is code related, you should consider checking the open issues in the main repository. If you cannot find an existing issue, please use the Bug Report template to create an issue with a minimal example.
Stack Overflow
Many members of the community use Stack Overflow to ask questions. Read through the existing questions tagged with react-native or ask your own!
Staying up to date
Official channels
The React Twitter account covers both React and React Native. Follow the React Native Twitter account and blog to find out what's happening in the world of React Native.
Proposals
React Native is still a young framework, and its rapid release cycle leaves the door open for discussing how it can evolve at every step of the way. If you want to know what the current proposals and RFCs are talking about, you can read through the Discussions and Proposals repository.
Conferences
There are a lot of React Native Meetups that happen around the world. Often there is React Native content in React meetups as well. React Native has been covered often in past React Conf talks. Videos for these talks can be found online in the following playlists: React Conf 2018, React Conf 2017, React Conf 2016, and React Conf 2015. The next React Conf will take place October 24 and 25 in Henderson, Nevada. You can also find a list of dedicated React Native conferences here.
React Native Show
The React Native Show is a video series from the React Native team covering updates to React Native:
Communities
Reactiflux Chat
If you need an answer right away, check out the Reactiflux Discord community. There are usually a number of React Native experts there who can help out or point you to somewhere you might want to look.
Forum-like groups
If you want to create less temporary conversations, check out the React Native Spectrum community or the React Native Facebook Group, which is more focused on post announcements, blog posts, talks, videos, cool new libraries, and apps. The Expo Forums are a good place to get help if you are using Expo.
Company-based Communities
Some companies actively involved in the React Native have also their own communication channels focused towards the projects they maintain, like Callstack.io's Discord server, Invertase.io's Discord server (e.g. React Native Firebase), Infinite Red's Slack Group and The Expo Slack Group.
Content sharing
DevTo community's and Medium's React Native tag are places where you can share React Native projects, articles and tutorials as well as start discussions and ask for feedback on React Native related topics. (but remember to give some love to the main documentation too!)
The React Native Community
There are a lot of developers around the world using React Native. This is a brief overview of where you can find them.
Where To Get Help
If you need help with your React Native app, the right place to go depends on the type of help that you need.
Repository
The core of React Native is worked on full-time by Facebook's React Native team. But there are far more people in the community who make key contributions and fix things. If the issue you are facing is code related, you should consider checking the open issues in the main repository. If you cannot find an existing issue, please use the Bug Report template to create an issue with a minimal example.
Stack Overflow
Many members of the community use Stack Overflow to ask questions. Read through the existing questions tagged with react-native or ask your own!
Staying up to date
Official channels
The React Twitter account covers both React and React Native. Follow the React Native Twitter account and blog to find out what's happening in the world of React Native.
Proposals
React Native is still a young framework, and its rapid release cycle leaves the door open for discussing how it can evolve at every step of the way. If you want to know what the current proposals and RFCs are talking about, you can read through the Discussions and Proposals repository.
Conferences
There are a lot of React Native Meetups that happen around the world. Often there is React Native content in React meetups as well. React Native has been covered often in past React Conf talks. Videos for these talks can be found online in the following playlists: React Conf 2019, React Conf 2018, React Conf 2017, React Conf 2016, and React Conf 2015. The next React Conf is yet to be announced. You can also find a list of dedicated React Native conferences here.
React Native Show
The React Native Show is a video series from the React Native team covering updates to React Native:
Communities
Reactiflux Chat
If you need an answer right away, check out the Reactiflux Discord community. There are usually a number of React Native experts there who can help out or point you to somewhere you might want to look.
Forum-like groups
If you want to create less temporary conversations, check out the React Native Spectrum community or the React Native Facebook Group, which is more focused on post announcements, blog posts, talks, videos, cool new libraries, and apps. The Expo Forums are a good place to get help if you are using Expo.
Company-based Communities
Some companies actively involved in the React Native have also their own communication channels focused towards the projects they maintain, like Callstack.io's Discord server, Invertase.io's Discord server (e.g. React Native Firebase), Infinite Red's Slack Group and The Expo Slack Group.
Content sharing
DevTo community's and Medium's React Native tag are places where you can share React Native projects, articles and tutorials as well as start discussions and ask for feedback on React Native related topics. (but remember to give some love to the main documentation too!)
The React Native Community
There are a lot of developers around the world using React Native. This is a brief overview of where you can find them.
Where To Get Help
If you need help with your React Native app, the right place to go depends on the type of help that you need.
Repository
The core of React Native is worked on full-time by Facebook's React Native team. But there are far more people in the community who make key contributions and fix things. If the issue you are facing is code related, you should consider checking the open issues in the main repository. If you cannot find an existing issue, please use the Bug Report template to create an issue with a minimal example.
Stack Overflow
Many members of the community use Stack Overflow to ask questions. Read through the existing questions tagged with react-native or ask your own!
Staying up to date
Official channels
The React Twitter account covers both React and React Native. Follow the React Native Twitter account and blog to find out what's happening in the world of React Native.
Proposals
React Native is still a young framework, and its rapid release cycle leaves the door open for discussing how it can evolve at every step of the way. If you want to know what the current proposals and RFCs are talking about, you can read through the Discussions and Proposals repository.
Conferences
There are a lot of React Native Meetups that happen around the world. Often there is React Native content in React meetups as well. React Native has been covered often in past React Conf talks. Videos for these talks can be found online in the following playlists: React Conf 2018, React Conf 2017, React Conf 2016, and React Conf 2015. The next React Conf will take place October 24 and 25 in Henderson, Nevada. You can also find a list of dedicated React Native conferences here.
React Native Show
The React Native Show is a video series from the React Native team covering updates to React Native:
Communities
Reactiflux Chat
If you need an answer right away, check out the Reactiflux Discord community. There are usually a number of React Native experts there who can help out or point you to somewhere you might want to look.
Forum-like groups
If you want to create less temporary conversations, check out the React Native Spectrum community or the React Native Facebook Group, which is more focused on post announcements, blog posts, talks, videos, cool new libraries, and apps. The Expo Forums are a good place to get help if you are using Expo.
Company-based Communities
Some companies actively involved in the React Native have also their own communication channels focused towards the projects they maintain, like Callstack.io's Discord server, Invertase.io's Discord server (e.g. React Native Firebase), Infinite Red's Slack Group and The Expo Slack Group.
Content sharing
DevTo community's and Medium's React Native tag are places where you can share React Native projects, articles and tutorials as well as start discussions and ask for feedback on React Native related topics. (but remember to give some love to the main documentation too!)
The React Native Community
There are a lot of developers around the world using React Native. This is a brief overview of where you can find them.
Where To Get Help
If you need help with your React Native app, the right place to go depends on the type of help that you need.
Repository
The core of React Native is worked on full-time by Facebook's React Native team. But there are far more people in the community who make key contributions and fix things. If the issue you are facing is code related, you should consider checking the open issues in the main repository. If you cannot find an existing issue, please use the Bug Report template to create an issue with a minimal example.
Stack Overflow
Many members of the community use Stack Overflow to ask questions. Read through the existing questions tagged with react-native or ask your own!
Staying up to date
Official channels
The React Twitter account covers both React and React Native. Follow the React Native Twitter account and blog to find out what's happening in the world of React Native.
Proposals
React Native is still a young framework, and its rapid release cycle leaves the door open for discussing how it can evolve at every step of the way. If you want to know what the current proposals and RFCs are talking about, you can read through the Discussions and Proposals repository.
Conferences
There are a lot of React Native Meetups that happen around the world. Often there is React Native content in React meetups as well. React Native has been covered often in past React Conf talks. Videos for these talks can be found online in the following playlists: React Conf 2019, React Conf 2018, React Conf 2017, React Conf 2016, and React Conf 2015. The next React Conf is yet to be announced. You can also find a list of dedicated React Native conferences here.
React Native Show
The React Native Show is a video series from the React Native team covering updates to React Native:
Communities
Reactiflux Chat
If you need an answer right away, check out the Reactiflux Discord community. There are usually a number of React Native experts there who can help out or point you to somewhere you might want to look.
Forum-like groups
If you want to create less temporary conversations, check out the React Native Spectrum community or the React Native Facebook Group, which is more focused on post announcements, blog posts, talks, videos, cool new libraries, and apps. The Expo Forums are a good place to get help if you are using Expo.
Company-based Communities
Some companies actively involved in the React Native have also their own communication channels focused towards the projects they maintain, like Callstack.io's Discord server, Invertase.io's Discord server (e.g. React Native Firebase), Infinite Red's Slack Group and The Expo Slack Group.
Content sharing
DevTo community's and Medium's React Native tag are places where you can share React Native projects, articles and tutorials as well as start discussions and ask for feedback on React Native related topics. (but remember to give some love to the main documentation too!)