useState reactjs code example

Example 1: react usestate

import React, { useState } from 'react';

function Example() {
  // Declare a new state variable, which we'll call "count"
  const [count, setCount] = useState(0);

  return (
    

      
You clicked {count} times
       setCount(count + 1)}>
        Click me
      
    
  );
}

Example 2: state with react functions

class Example extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      count: 0
    };
  }

  render() {
    return (
      

        
You clicked {this.state.count} times
         this.setState({ count: this.state.count + 1 })}>
          Click me
        
      
    );
  }
}

Example 3: react hook usestate

function Counter({initialCount}) {
  const [count, setCount] = useState(initialCount);
  return (
    <>
      Count: {count}
       setCount(initialCount)}>Reset
       setCount(prevCount => prevCount - 1)}>-
       setCount(prevCount => prevCount + 1)}>+
    
  );
}

Example 4: usestate hook

import React, { useState } from 'react';

function Example() {
  // Declare a new state variable, which we'll call "count"  
  const [count, setCount] = useState(0);
  return (
    

      
You clicked {count} times
       setCount(count + 1)}>
        Click me
      
    
  );
}

Example 5: usestate react

import React, { useState } from 'react';

function Example() {
	
  const [count, setCount] = useState(0);
  
  return (
    

      
You clicked {count} times
       setCount(count + 1)}>
        Click me
      
    
  );
}

Example 6: useState

import React, { useState } from 'react';
function Example() {
  const [variable, callforupdate] = useState(defaulttwhatever);// <-- this it
  return (
    

    );
}