We Know is React is one of the Popular and Well know Javascript libraries. This Javascript Language is famous because Developers and users Enjoy Web Applications that build with ReactJS because of Fast Development and Quick Loading. All these Features are connected to the Component. Component divided Web Application into Small parts. so in this Article, we’ll see the lifecycle of the Component. How they render and Display to users. You can Ask this Question when You Hire Reactjs Developers
What is Component Life Cycle?
The ReactJs Component Lifecycle is the Journey of the Component’s Life. For Example, Birth, Grow, and Death of the Component. Main three phases of the Component Lifecycle.
1. Mounting
2. Updating
3. Unmounting
Let’s Dive deep into this process
Mounting
It’s similar to bringing a newborn into the world when mounting a component. This is the first step of a component of life. At this moment, React ‘s internals is inserted into the component consisting of your code.
Updating
When the Mounting phase completed than updating phase start. in this stage, Component Grow and updates using props and state. When this phase ends Application Refreshes and gets New information into DOM.
Unmounting
it’s the Final Stage of the Component. in this Stage Component died. in the tech term Component Removed from DOM.
Every Component does not follow All these stages Few are Just Mount and Without updating phase they direct Unmount.
React Component Life cycle
Let’s explore more in React Component Life cycle
1. Initial
it’s Starting Point of the Life of React Component. in this stage Component starts its journey toward DOM. A component’s default Props and starting State are available during this phase. Instance functions where initial properties are set are available during this phase. The use of the following approaches is available in the first phase, which occurs only once.
getDefaultProps()
this is the Set Default Props value. getDefaultProps supplies the Props value before the Component is created.
getInitialState()
The default state is specified using this. It is called before creating the component.
2. Mounting Phase
React includes the built-in function of elements, which is made and inserted within this step of the react component. Comprises four built-in functions, which are named for these steps as follows
componentWillMount()
This function is called prior to an element being rendered to the DOM. If the setState() function is called aloud, the node will not re-render during this time.
getDerviedStateFromProps()
The getDerivedStateFromProps() function is called before attempting to make the specified components in the DOM. Mounting state objects on their previous props is based on supplying the new state object to produce an object that matches the previous props.
componentDidMount()
Function after a component is rendered and placed in DOM is called. Afterward, you can do any other DOM queries you want.
render()
Property of almost every Element, the method returns an instance of HTML to include or omit the root Node. If you must provide an Attribute or Element to stop rendering continue, pass it
3. Updating
The following step in the Updating phase of the React component lifecycle is Updating. Since the conditions of an element or its props change, the component is updated with those changes.
The initial objective of this phase is to verify that the component is showing the latest version. This task, along with the others, repeats itself in this phase. The following five functions are available in the component.
componentWillRecieveProps()
Transforms into another state when a device’s new interfaces are made. It will be ideal if you have a compare and contrast. The interface and the next are used amid the transition. This.setState() method is performed during state transitions.
shouldComponentUpdate()
When it is decided by an element to make a change to the DOM, the function is called. It allows you to control how changes to it occur. The part of the method will be updated if the same method returns true. Otherwise, it will not be updated.
componentWillUpdate()
It is also known as just when it is about to be updated. This does not include letting you change the status of the component. The system’s current state can be changed by the method setState(). ShouldComponentUpdate() returns false, it will not be called.
shouldComponentUpdate()
When you’re given the choice to select an element, it’s deemed you will make changes to it. The element can be modified when the same method is fruitful. If it is not, it does not change.
componentWillUpdate()
It changes leading to the formation of the end product as it is updated. The method setState() is used to affect the system’s current state. ShouldComponentUpdate() returns true, then the method called DoChangeState() will update the system’s state.
Render
When shouldComponentUpdate() returns false, the render() function will start furthermore to ensure that the component displays correctly.
4. Unmounting Phase
When a part is mounted and removed from DOM, the lifecycle goes to the next stage. There is only one step in this phase, which is described briefly below.
componentWillUnmount()
The process known as before a component is permanently removed and unmounted is called. It invalidates event listeners, cancels network requests, and cleans DOM components, among other things. Attempting to return to a component that is no longer mounted will not work.
Conclusion
Here, lifetime methods are shown for React’s latest build. Be mindful to take the time to utilize the built-in abilities as it will improve your development abilities. read more technology articles – here