React usestate

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 (
    <div>
      <p>You clicked {count} times</p>
      <button onClick={() => setCount(count + 1)}>
        Click me
      </button>
    </div>
  );
}

Source: reactjs.org

React useEffect

import React, { useEffect } from 'react';

export const App: React.FC = () => {
  
  useEffect(() => {
        
  }, [/*Here can enter some value to call again the content inside useEffect*/])
  
  return (
    <div>Use Effect!</div>
  );
}

Prevstate in usestate

const [prevState, setState] = React.useState([]);

setState(prevState => [...prevState, 'somedata'] );

Usestate in react

  const [x, setx] = useState(0);

Source: reactjs.org

Usestate react

import React, { useState } from 'react';

function Example() {
	
  const [count, setCount] = useState(0);
  
  return (
    <div>
      <p>You clicked {count} times</p>
      <button onClick={() => setCount(count + 1)}>
        Click me
      </button>
    </div>
  );
}

Source: reactjs.org

React useState hook

 1:  import React, { useState } from 'react'; 2:
 3:  function Example() {
 4:    const [count, setCount] = useState(0); 5:
 6:    return (
 7:      <div>
 8:        <p>You clicked {count} times</p>
 9:        <button onClick={() => setCount(count + 1)}>10:         Click me
11:        </button>
12:      </div>
13:    );
14:  }

Source: reactjs.org

Similar codes

5 votes215 views3 answers
React routes multiple compoenents
Javascript React
0 vote224 views1 answer
React Mixed symbols
Javascript React
0 vote300 views1 answer
React video srcObject
Javascript React
1 vote247 views1 answer
Expo update react native
Javascript React
4 votes247 views1 answer
React router external link
Javascript React
8 votes242 views2 answers
React set title of page
Javascript React
0 vote904 views1 answer
Hide react from netlify
Javascript React
0 vote251 views1 answer
React-native-dropdown-picker for form react native
Javascript React
103 votes201 views7 answers
How to create react app
Javascript React
0 vote246 views1 answer
React native get source maps
Javascript React