/Javascript/React/Counter with react hooks

Counter with react hooks

import React, { useState } from 'react';

function Example() {
  // Declaración de una variable de estado que llamaremos "count"  const [count, setCount] = useState(0);
  return (
    <div>
      <p>You clicked {count} times</p>
      <button onClick={() => setCount(count + 1)}>
        Click me
      </button>
    </div>
  );
}

Source: es.reactjs.org

Automated counter with react hooks

const { useState, useEffect, useRef } = React;

function useInterval(callback, delay) {
  const savedCallback = useRef();

  // Remember the latest callback.
  useEffect(() => {
    savedCallback.current = callback;
  }, [callback]);

  // Set up the interval.
  useEffect(() => {
    let id = setInterval(() => {
      savedCallback.current();
    }, delay);
    return () => clearInterval(id);
  }, [delay]);
}

function App() {
  const [counter, setCounter] = useState(0);

  useInterval(() => {
    setCounter(counter + 1);
  }, 1000);

  return <h1>{counter}</h1>;
};

ReactDOM.render(
  <App />,
  document.getElementById('root')
);

Source: stackoverflow.com

Similar codes

9 votes183 views1 answer
Create react app in current folder
Javascript React
0 vote326 views5 answers
Prototype react
Javascript React
1 vote186 views1 answer
React repeat
Javascript React
0 vote190 views1 answer
React native firebase community template
Javascript React
0 vote187 views1 answer
Heroku buildpacks with react
Javascript React
0 vote203 views1 answer
HandleClickoutside custom hook react
Javascript React
1 vote207 views1 answer
UseScreens() react native
Javascript React
0 vote184 views1 answer
Make 2div in row react js
Javascript React
64 votes195 views6 answers
React js router
Javascript React
142 votes308 views5 answers
Install react
Javascript React