ComponentDidUpdate - React Js

 App.js

import React, { Component, useState } from 'react';

import './App.css'

class App extends Component {

  constructor()

  {

  super()

  console.warn("Constructor")

  // this.state={name:"Krishan"}

  this.state={count:0}

  }

  componentDidUpdate(preProps, preState, snapshot)

  {

    console.warn("Component did Update", preState)

  }

  render()

  {

    console.warn("Render")

    return (

      <div>

        <h1>Component Did Mount {this.state.count}</h1>

        <button onClick={()=>{this.setState({count:this.state.count+1})}}>Update Name</button>

      </div>

 

    )

  }

 

}

export default App;