ĭon't forget that for network and URI-encoded images, you will need to manually specify the dimensions of your image. The getDefaultProps can be used to define any default props that can be accessed using. Both methods are called before the Mounting phase starts. The first phase is Initialization where you can define defaults and initial values for this.props and this.state by implementing getDefaultProps() and getInitialState() methods respectively. Initialization (refer section 1 in the image) Let’s take a closer look at each phase of React Component:ġ. These methods are called the component’s lifecycle methods and they are invoked in a predictable order. React JS provides several methods that notify us when a certain stage of this process occurs. Each and every React Component goes through the component’s lifecycle. The process in which all these phases are involved is called the component’s lifecycle. All React Component Lifecycle methods can be split into four phases of React Component: Phases of React Component LifecycleĮach React Component goes through different stages of lifecycle that are called Phases in React terminology. You can take your React JS User Interfaces to next level in short time if you combine your development skills with component lifecycle. So, with the use of lifecycle methods provided by the React JS, developers can produce a quality application and can really plan whats and hows at various points of birth, growth or death of user interfaces. And you can do this with the help of React Component lifecycle methods. You can decide whether to play the video or not as you hover over, based on your choice. As a result, you will save battery as well as network usage. But if you add the React Component for each video, you will be able to play/pause the video which will make sure only those videos are played which you want to watch. In this case, the application will use the network to buffer videos and it will keep on consuming battery. Consider a scenario where you are creating an application in which you can allow multiple videos to run on the same page. The component lifecycle methods are various methods which are invoked at different phases of the lifecycle of a component. React Component Lifecycle Methods and Benefits: Same is the case for React Component, and once you understand the similarity, it will be very easy for you to understand the React JS Component Lifecycle and its various methods during the different stages/phases. You can divide your life into parts that you can call the stages or the phases of life. From the moment you’re born you start changing till your last breath. Everything is constantly changing over time. Every lifecycle signifies one important thing “CHANGE”. Component Lifecycle:īefore we dive deep into the React Component lifecycle, I would like you to think about your lifecycle and then compare both - your and React JS lifecycle. React JS basically uses a very optimized diff algorithm that compares the virtual DOM of the current and previous state. React JS uses a fast, in-memory and lightweight representation of DOM called virtual DOM. When data changes, React JS automatically handles all the changes in the UI without you having to deal with Document Object Model (DOM). One of the most important features of React JS, which makes it stand out, is that it allows you to simply express how your app should look based on your data at any point of time. Each component lets you split the User Interface (UI) into independent, reusable pieces and allows you to think about each piece in isolation. React JS is a JavaScript library for creating User Interfaces, authored by Facebook and Instagram engineers.
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