{"id":6350,"date":"2023-06-01T08:49:22","date_gmt":"2023-06-01T08:49:22","guid":{"rendered":"https:\/\/dianapps.com\/blog\/?p=6350"},"modified":"2024-01-09T07:10:22","modified_gmt":"2024-01-09T07:10:22","slug":"a-deep-dive-into-the-react-native-component-lifecycle","status":"publish","type":"post","link":"https:\/\/www.dianapps.com\/blog\/a-deep-dive-into-the-react-native-component-lifecycle\/","title":{"rendered":"A Deep Dive into the React Native Component Lifecycle"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">If you are entering into the exciting domain of React native app development, understanding the internal operations of its components lifecycle is necessary. Just like a beating heart, this component lifecycle maintains the behaviour and flow of your application\u2019s basic elements.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In this intuitive journey, we\u2019ll dive into the deep investigation of the React Native Component lifecycle, including its stages &#8211; initialization, updates, and unmounting. By obtaining in-depth insights into how these components operate at each phase of the lifecycle, developers can boost performance, handle state modifications, and take required actions.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Let\u2019s uncover the basics of React native app development framework to streamline your app development process!<\/span><\/p>\n<h1><span class=\"ez-toc-section\" id=\"What-are-React-Lifecycle-Methods\"><\/span><span style=\"font-weight: 400;\">What are React Lifecycle Methods?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p><span style=\"font-weight: 400;\">Each phase has its own React class component. The properties or props that are acquired by a component instance when it is created and inserted into the DOM can now be accessed by using this. props function. The entire lifecycle \u201cthing&#8221; starts at this stage.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Do keep in mind that a React component may NOT go through all of the phases. Without any updates or error handling, the component might be mounted and unmounted within the next minute.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A component\u2019s lifecycle can be categorized into 4 parts:<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Mounting<\/b><span style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">: In this phase, component instances are created and inserted into the DOM.<\/span><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Updating<\/b><span style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">: In the updating phase, a react component is said to be born and it starts growing by receiving new updates.<\/span><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Unmounting<\/b><span style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">: In this phase, a react component gets removed from the actual DOM.<\/span><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Error Handling<\/b><span style=\"font-weight: 400;\">: It is invoked when any error occurs while rendering the component.<\/span><\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"Methods-in-React-Native-Component-Lifecycle\"><\/span><span style=\"font-weight: 400;\">Methods in React Native Component Lifecycle<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1-Mounting\"><\/span><span style=\"font-weight: 400;\">1. Mounting<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Below are the methods which get called when an instance of a component is created and inserted into the DOM.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"A-Constructor\"><\/span><span style=\"font-weight: 400;\">A. Constructor()<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">First comes the constructor method, then mounting to the DOM, and finally rendering. Normally, you would initialize the state and attach event handlers inside the constructor method. This method is the first stage of the lifecycle and is only executed when it is explicitly declared; otherwise, use componentDidMount(). There is no need to create any side effects or subscriptions in this method.\u00a0<\/span><\/p>\n<pre class=\"theme:github font-size:14 height-set:true height:250 nums:false lang:default decode:true \">constructor(props){\r\n\r\n\u00a0\u00a0\u00a0\u00a0super(props);\r\n\r\n\u00a0\u00a0\u00a0\u00a0this.state = {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0message: 'hello world',\r\n\r\n\u00a0\u00a0\u00a0\u00a0} \/\/ this is our initial data\r\n\r\n\u00a0\u00a0}<\/pre>\n<h4><span class=\"ez-toc-section\" id=\"B-static-getDerivedStateFromProps\"><\/span><span style=\"font-weight: 400;\">B. static <\/span><i><span style=\"font-weight: 400;\">getDerivedStateFromProps<\/span><\/i><span style=\"font-weight: 400;\">()<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">Despite of calling setState, <\/span><i><span style=\"font-weight: 400;\">GetDerivedStateFromProps <\/span><\/i><span style=\"font-weight: 400;\">returns an object with the updated state. Note that there are no unintended side effects to the function. Because <\/span><i><span style=\"font-weight: 400;\">GetDerivedStateFromProps <\/span><\/i><span style=\"font-weight: 400;\">may be called several times for just a single update, it is necessary to refrain from any negative effects. Since <\/span><i><span style=\"font-weight: 400;\">componentDidUpdate <\/span><\/i><span style=\"font-weight: 400;\">only executes once following a component update, consider using it as an alternative.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">You can either return a null value or an object to make no changes to the component&#8217;s state:<\/span><\/p>\n<pre class=\"theme:github font-size:14 height-set:true height:250 nums:false lang:default decode:true\">\/\/ ...\r\n\r\nstatic getDerivedStateFromProps(props, state) {\r\n\r\n\u00a0\u00a0return {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0message: 'updated msg',\r\n\r\n\u00a0\u00a0}\r\n\r\n}\r\n\r\n\/\/ or you can return null to make no update\r\n\r\nstatic getDerivedStateFromProps(props, state) {\r\n\u00a0return null\r\n}\r\n\r\n\/\/ ...<\/pre>\n<h4><span class=\"ez-toc-section\" id=\"C-render\"><\/span><span style=\"font-weight: 400;\">C. render()<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">The render method is the next lifecycle method called after the static <\/span><i><span style=\"font-weight: 400;\">getDerivedStateFromProps <\/span><\/i><span style=\"font-weight: 400;\">function. The render method must return a React Native component (JSX element) in order to render something, or null to render nothing. This step completes the rendered UI component.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Remember that the render function of the render method should be pure; therefore, refrain from attempting to use setState or interact with external APIs. It generates the same outcome every time it is used and doesn&#8217;t engage in any kind of interaction with the browser.<\/span><\/p>\n<pre class=\"theme:github font-size:14 height-set:true height:250 nums:false lang:default decode:true \">render(){\r\n\r\n\u00a0\u00a0return (\r\n\r\n\u00a0\u00a0\u00a0\u00a0&lt;View&gt;\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;Text&gt;{this.state.message}&lt;\/Text&gt;\r\n\r\n\u00a0\u00a0\u00a0\u00a0&lt;\/View&gt;\r\n\r\n\u00a0\u00a0)\r\n\r\n}<\/pre>\n<p><span style=\"font-weight: 400;\">Learn How to <\/span><a href=\"https:\/\/dianapps.com\/blog\/integrating-apis-in-react-native-for-enhanced-functionality\/\"><span style=\"font-weight: 400;\">integrate APIs in React native<\/span><\/a><span style=\"font-weight: 400;\"> to enhance your app\u2019s functionality.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"D-ComponentDidMount\"><\/span><span style=\"font-weight: 400;\">D. ComponentDidMount()<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">Following the completion of render(), the component is mounted to the DOM and <\/span><i><span style=\"font-weight: 400;\">ComponentDidMount<\/span><\/i><span style=\"font-weight: 400;\">() is called immediately. When this method is called, a UI element has been rendered, without a doubt. Here, subscriptions (for example, timers) can be set up and a fetch request to the server can be made. Always consider that changing the state will cause a new instance of the render() method to be called without taking into account the previous state. Before calling this function, we are using the virtual DOM.\u00a0<\/span><\/p>\n<pre class=\"theme:github font-size:14 height-set:true height:250 nums:false lang:default decode:true \">\/\/ good place to call setState here\r\n\r\ncomponentDidMount(){\r\n\r\n\u00a0\u00a0this.setState({\r\n\r\n\u00a0\u00a0\u00a0\u00a0message: 'i got changed',\r\n\r\n\u00a0\u00a0});\r\n\r\n}\r\n\r\n---\r\n\r\n\/\/ or to make request to the server\r\n\r\ncomponentDidMount() {\r\n\r\n\u00a0\u00a0\u00a0\u00a0fetch('https:\/\/api.mydomain.com')\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0.then(response =&gt; response.json())\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0.then(data =&gt; this.setState({ message: data.message }));\r\n\r\n\u00a0\u00a0}<\/pre>\n<p><span style=\"font-weight: 400;\">Second use case: componentDidMount() is a great place to retrieve data from a server, call our setState() method to change the application&#8217;s state, and render() the newly updated information.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"2-Updating\"><\/span><span style=\"font-weight: 400;\">2. Updating<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Whenever any change occurs inside the component or parent component, for instance, when the prop or state are changed, the component may require to be re-rendered. If simply put, the component is updated.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">So, which lifecycle methods are called while the component is is updated? Let\u2019s have a look!<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"A-static-getDerivedStateFromProps\"><\/span><span style=\"font-weight: 400;\">A. static getDerivedStateFromProps()<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">First, the static <\/span><i><span style=\"font-weight: 400;\">getDerivedStateFromProps <\/span><\/i><span style=\"font-weight: 400;\">function is called. That\u2019s the first method to be used. It&#8217;s important to keep in mind that, this method is used during both mounting and updating phases.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"B-shouldComponentUpdate\"><\/span><span style=\"font-weight: 400;\">B. shouldComponentUpdate()<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">When the state or props change, you want a component to re-render by default or even in most situations.<\/span><span style=\"font-weight: 400;\"> But there is some control over this behavior that you have. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">React decides whether or not to update a component at this moment.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Upon a change in the state or props, you can control whether the component is re-rendered or not within this lifecycle method by returning a boolean. Usually, performance optimization measures are implemented using this lifecycle method.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"C-render-2\"><\/span><span style=\"font-weight: 400;\">C. render()<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">Depending on the returned value from the <\/span><i><span style=\"font-weight: 400;\">shouldComponentUpdate <\/span><\/i><span style=\"font-weight: 400;\">method, which by default, returns true, a render is called right away after the <\/span><i><span style=\"font-weight: 400;\">shouldComponentUpdate <\/span><\/i><span style=\"font-weight: 400;\">method has been called.\u00a0<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"D-getSnapshotBeforeUpdateprevProps-prevState\"><\/span><span style=\"font-weight: 400;\">D. getSnapshotBeforeUpdate(prevProps, prevState)<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><i><span style=\"font-weight: 400;\">getSnapshotBeforeUpdate<\/span><\/i><span style=\"font-weight: 400;\">() is called immediately following the render method and before the most recent rendered output is committed, such as to the DOM.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Although it has a common use case in React, it serves no purpose in React Native. To sum up, if you are using React to create a chat application, you can use this method to determine the scroll size and scroll to the bottom as new messages are received. Simply use the <\/span><i><span style=\"font-weight: 400;\">onContentSizeChange <\/span><\/i><span style=\"font-weight: 400;\">prop for <\/span><i><span style=\"font-weight: 400;\">ScrollView <\/span><\/i><span style=\"font-weight: 400;\">in React Native. A component with auto-scroll functionality might resemble this:<\/span><\/p>\n<pre class=\"theme:github font-size:14 height-set:true height:250 nums:false lang:default decode:true \">&lt;ScrollView\u00a0\r\n\u00a0 \u00a0 \u00a0onContentSizeChange={()=&gt;{this.scrollViewRef.scrollToEnd();}}\u00a0\r\n\u00a0 \u00a0 \u00a0ref={(ref) =&gt; this.scrollViewRef = ref}\r\n&gt;\r\n\u00a0 \u00a0&lt;Chats chatList={this.state.chatList} \/&gt;\r\n&lt;\/ScrollView&gt;<\/pre>\n<p><span style=\"font-weight: 400;\">To keep you informed of new messages, <\/span><i><span style=\"font-weight: 400;\">ScrollView <\/span><\/i><span style=\"font-weight: 400;\">is automatically scrolled to the bottom when chatList is updated with new messages.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"E-componentDidUpdate\"><\/span><span style=\"font-weight: 400;\">E. componentDidUpdate()<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">The <\/span><i><span style=\"font-weight: 400;\">componentDidUpdate<\/span><\/i><span style=\"font-weight: 400;\">() method is called immediately as soon as the update occurs. This approach is not utilized in the initial render. As long as you compare the current props to previous props, this is a ideal point to make network requests as well (e.g., a network request may not be required if the props have not changed).<\/span><\/p>\n<pre class=\"theme:github font-size:14 height-set:true height:250 nums:false lang:default decode:true\">componentDidUpdate(preProps) {\r\n\r\n\u00a0\u00a0if(prevProps.selectedState !== this.props.selectedState){\r\n\r\n\u00a0\u00a0\u00a0\u00a0fetch('https:\/\/pathToApi.com')\r\n\r\n\u00a0\u00a0\u00a0\u00a0.then(resp =&gt; resp.json())\r\n\r\n\u00a0\u00a0\u00a0\u00a0.then(respJson =&gt; {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ do what ever you want with your `response`\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this.setState({\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0isLoading: false,\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0data: respJson,\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0});\r\n\r\n\u00a0\u00a0\u00a0\u00a0})\r\n\r\n\u00a0\u00a0\u00a0\u00a0.catch(err =&gt; {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(err)\r\n\r\n\u00a0\u00a0\u00a0\u00a0})\r\n\r\n\u00a0\u00a0}\r\n\r\n}<\/pre>\n<h3><span class=\"ez-toc-section\" id=\"3-Unmounting\"><\/span><span style=\"font-weight: 400;\">3. Unmounting<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"-A-componentWillUnmount\"><\/span><span style=\"font-weight: 400;\">\u00a0 \u00a0 A. componentWillUnmount()<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">Just before a component is unmounted and destroyed, <\/span><i><span style=\"font-weight: 400;\">componentWillUnmount<\/span><\/i><span style=\"font-weight: 400;\">() is called. Execute any necessary cleanup in this method, including invalidating timers, cancelling network requests, and removing any subscriptions that <\/span><i><span style=\"font-weight: 400;\">componentDidMount<\/span><\/i><span style=\"font-weight: 400;\">() may have created.<\/span><\/p>\n<pre class=\"theme:github font-size:14 height-set:true height:250 nums:false lang:default decode:true \">\/\/ e.g add event listener\u00a0\r\n\r\ncomponentDidMount() {\u00a0\r\n\r\nel.addEventListener()\u00a0\r\n\r\n}\u00a0\r\n\r\n\/\/ e.g remove event listener\u00a0\u00a0\r\n\r\ncomponentWillUnmount() {\u00a0\r\n\r\n\u00a0\u00a0\u00a0\u00a0el.removeEventListener()\u00a0\r\n\r\n}<\/pre>\n<p><span style=\"font-weight: 400;\">Typical uses of componentDidMount with componentWillUnmount &#8211;\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Since the component won&#8217;t ever be re-rendered, you shouldn&#8217;t call setState() in componentWillUnmount(). It is impossible to remount a component instance once it has been unmounted.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"4-Error-handling\"><\/span><span style=\"font-weight: 400;\">4. Error handling<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Imagine writing a code for a <\/span><a href=\"https:\/\/dianapps.com\/mobile-app-development\"><b>mobile app development <\/b><\/a><span style=\"font-weight: 400;\">process without any mistakes! <\/span><span style=\"font-weight: 400;\">However, this is a more impractical objective. In real life, mistakes are common; sometimes we recognize them, other times we don&#8217;t. Thus, in this section, you will learn some basic error-handling techniques to help you avoid making the same mistakes.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Let&#8217;s add a straightforward component to the demo app to detect mistakes. To do this, we&#8217;ll make a brand-new component called ErrorBoundary.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Here\u2019s the most basic implementation:<\/span><\/p>\n<pre class=\"theme:github font-size:14 height-set:true height:250 nums:false lang:default decode:true\">import React, { Component } from 'react';\u00a0\r\n\r\nclass ErrorBoundary extends Component {\u00a0\r\n\r\n\u00a0state = {\r\n\r\n\u00a0\u00a0\u00a0hasError: false,\r\n\r\n};\u00a0\r\n\r\n\u00a0render() {\u00a0\r\n\r\n\u00a0\u00a0\u00a0return this.props.children;\u00a0\r\n\r\n\u00a0\u00a0}\u00a0\r\n\r\n}\u00a0\r\n\r\nexport default ErrorBoundary;<\/pre>\n<h4><span class=\"ez-toc-section\" id=\"-A-static-getDerivedStateFromError\"><\/span><span style=\"font-weight: 400;\">\u00a0 A. static getDerivedStateFromError()<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">This method is always called first and receives the error as an argument whenever a descendant component throws an error.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The state of the component is updated using whatever value is returned by this method.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Let&#8217;s update the ErrorBoundary component, using this lifecycle method.<\/span><\/p>\n<pre class=\"theme:github font-size:14 nums:false lang:default decode:true\">import React, { Component } from \"react\";\u00a0\r\n\r\nclass ErrorBoundary extends Component {\u00a0\r\n\r\n\u00a0state = {\r\n\r\n\u00a0\u00a0hasError: false,\r\n\r\n\u00a0};\u00a0\r\n\r\n\u00a0static getDerivedStateFromError(error) {\u00a0\r\n\r\n\u00a0\u00a0\u00a0\u00a0console.log(`Error log from getDerivedStateFromError: ${error}`);\u00a0\r\n\r\n\u00a0\u00a0\u00a0\u00a0return { hasError: true };\u00a0\r\n\r\n\u00a0}\u00a0\r\n\r\n\u00a0render() {\r\n\r\n\u00a0\u00a0\u00a0\u00a0if(this.state.hasError) {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return &lt;Text&gt; Something went wrong :( &lt;\/Text&gt;\r\n\r\n\u00a0\u00a0\u00a0\u00a0}\u00a0\r\n\r\n\u00a0\u00a0\u00a0\u00a0return this.props.children;\u00a0\r\n\r\n\u00a0\u00a0}\u00a0\r\n\r\n}\u00a0\r\n\r\nexport default ErrorBoundary;<\/pre>\n<p><span style=\"font-weight: 400;\">From now on, whenever a descendant component throws an error, the error will be console.log(error), and the <\/span><i><span style=\"font-weight: 400;\">getDerivedStateFromError <\/span><\/i><span style=\"font-weight: 400;\">method will return an object. This will be used to update the <\/span><i><span style=\"font-weight: 400;\">hasError:true<\/span><\/i><span style=\"font-weight: 400;\"> state of the <\/span><i><span style=\"font-weight: 400;\">ErrorBoundary <\/span><\/i><span style=\"font-weight: 400;\">component.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Note:<\/span> <span style=\"font-weight: 400;\">\u00a0side effects are not allowed because <\/span><i><span style=\"font-weight: 400;\">getDerivedStateFromError<\/span><\/i><span style=\"font-weight: 400;\">() is called during the &#8220;render&#8221; stage. Use <\/span><i><span style=\"font-weight: 400;\">componentDidCatch<\/span><\/i><span style=\"font-weight: 400;\">() in those situations instead.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"B-componentDidCatcherror-info\"><\/span><span style=\"font-weight: 400;\">B. componentDidCatch(error, info)<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">Additionally, after a descendant component throws an error, the <\/span><i><span style=\"font-weight: 400;\">componentDidCatch <\/span><\/i><span style=\"font-weight: 400;\">method is invoked. In addition to the error that is thrown, it also passes another argument that contains further details about the mistake. You can send the error or information obtained using this technique to an outside logging service. <\/span><i><span style=\"font-weight: 400;\">componentDidCatch<\/span><\/i><span style=\"font-weight: 400;\">, as opposed to <\/span><i><span style=\"font-weight: 400;\">getDerivedStateFromError<\/span><\/i><span style=\"font-weight: 400;\">, supports side effects<\/span><\/p>\n<pre class=\"theme:github font-size:14 nums:false lang:default decode:true \">componentDidCatch(error, info) {\u00a0\r\n\r\n\u00a0\u00a0logComponentStackToMyService(info.componentStack);\r\n\r\n\u00a0\u00a0\/\/ logToExternalService may make an API call.\u00a0\r\n\r\n}<\/pre>\n<p><span style=\"font-weight: 400;\">Let\u2019s update the ErrorBoundary component to use the componentDidCatch method:<\/span><\/p>\n<pre class=\"theme:github nums:false lang:default decode:true\">class ErrorBoundary extends React.Component {\r\n\r\n\u00a0\u00a0constructor(props) {\r\n\r\n\u00a0\u00a0\u00a0\u00a0super(props);\r\n\r\n\u00a0\u00a0\u00a0\u00a0this.state = { hasError: false };\r\n\r\n\u00a0\u00a0}\r\n\r\n\u00a0\u00a0static getDerivedStateFromError(error) {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\/\/ Update state so the next render will show the fallback UI.\r\n\r\n\u00a0\u00a0\u00a0\u00a0return { hasError: true };\r\n\r\n\u00a0\u00a0}\r\n\r\n\u00a0\u00a0componentDidCatch(error, info) {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\/\/ Example \"componentStack\":\r\n\r\n\u00a0\u00a0\u00a0\u00a0\/\/ \u00a0 in ComponentThatThrows (created by App)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\/\/ \u00a0 in ErrorBoundary (created by App)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\/\/ \u00a0 in div (created by App)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\/\/ \u00a0 in App\r\n\r\n\u00a0\u00a0\u00a0\u00a0logComponentStackToMyService(info.componentStack);\r\n\r\n\u00a0\u00a0}\r\n\r\n\u00a0\u00a0render() {\r\n\r\n\u00a0\u00a0\u00a0\u00a0if (this.state.hasError) {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ You can render any custom fallback UI\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return &lt;Text&gt;Something went wrong.&lt;\/Text&gt;;\r\n\r\n\u00a0\u00a0\u00a0\u00a0}\r\n\r\n\u00a0\u00a0\u00a0\u00a0return this.props.children;\u00a0\r\n\r\n\u00a0\u00a0}\r\n\r\n}<\/pre>\n<p><span style=\"font-weight: 400;\">Additionally, since <\/span><i><span style=\"font-weight: 400;\">ErrorBoundary <\/span><\/i><span style=\"font-weight: 400;\">is only able to handle errors from descendant components, we&#8217;ll either have the component display whatever is passed to it as <\/span><i><span style=\"font-weight: 400;\">children <\/span><\/i><span style=\"font-weight: 400;\">or, in the event that something went wrong, display a default error UI.\u00a0<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"The-Final-Outline\"><\/span><span style=\"font-weight: 400;\">The Final Outline<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Thus, in order to create high-performance, effective, and reliable mobile applications, it is crucial to comprehend the React Native component lifecycle. The component lifecycle is a series of activities that take place from the moment of a component&#8217;s development until its demise. Every event offers the chance to carry out particular actions, such as obtaining data, changing the state, or depleting resources. In order to create seamless user experiences, Hire react native app developers who are experienced with component lifecycle methods and how to leverage them.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">DianApps is a fantastic option if you&#8217;re searching for a professional <\/span><a href=\"https:\/\/dianapps.com\/react-native-app-development\"><b>React Native app development company<\/b><\/a><span style=\"font-weight: 400;\">. DianApps can assist you in creating cutting-edge mobile applications that make use of all of React Native&#8217;s features thanks to its staff of skilled developers. DianApps provides complete React Native development services, from UI design to API integration, to help you meet your mobile app development objectives. For more information on how DianApps can assist you in creating your upcoming React Native mobile app, get in touch with them right away. <\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>If you are entering into the exciting domain of React native app development, understanding the internal operations of its components lifecycle is necessary. Just like a beating heart, this component lifecycle maintains the behaviour and flow of your application\u2019s basic elements. In this intuitive journey, we\u2019ll dive into the deep investigation of the React Native [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6359,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_wp_applaud_exclude":false,"footnotes":""},"categories":[3],"tags":[104,271],"class_list":["post-6350","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-app-development","tag-react-native","tag-react-native-component-lifecycle"],"featured_image_src":{"landsacpe":["https:\/\/www.dianapps.com\/blog\/wp-content\/uploads\/2023\/06\/Untitled-design-82-1140x445.png",1140,445,true],"list":["https:\/\/www.dianapps.com\/blog\/wp-content\/uploads\/2023\/06\/Untitled-design-82-463x348.png",463,348,true],"medium":["https:\/\/www.dianapps.com\/blog\/wp-content\/uploads\/2023\/06\/Untitled-design-82-300x169.png",300,169,true],"full":["https:\/\/www.dianapps.com\/blog\/wp-content\/uploads\/2023\/06\/Untitled-design-82.png",1536,864,false]},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.12 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>A Deep Dive into the React Native Component Lifecycle<\/title>\n<meta name=\"description\" content=\"Learn about the React Native component lifecycle and its various components in this all-inclusive guide\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dianapps.com\/blog\/a-deep-dive-into-the-react-native-component-lifecycle\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A Deep Dive into the React Native Component Lifecycle\" \/>\n<meta property=\"og:description\" content=\"Learn about the React Native component lifecycle and its various components in this all-inclusive guide\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dianapps.com\/blog\/a-deep-dive-into-the-react-native-component-lifecycle\/\" \/>\n<meta property=\"og:site_name\" content=\"Learn About Digital Transformation &amp; 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