/Javascript/React/Automated counter with react hooks

Automated 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

0 vote404 views1 answer
Make custom draggable in react
Javascript React
0 vote356 views2 answers
How to add fcc cdn to local react projcet
Javascript React
1 vote427 views2 answers
React js alert popup example
Javascript React
-2 votes414 views2 answers
React native text align vertical center
Javascript React
2 votes383 views4 answers
Can't perform a React state update on an unmounted component
Javascript React
2 votes379 views3 answers
React native component at bottom center
Javascript React
2 votes372 views1 answer
Can't import react bootstrap
Javascript React
0 vote422 views1 answer
Reactjs typeError: Cannot read property 'offsetHeight' of null
Javascript React
0 vote415 views1 answer
Debugging react native
Javascript React
0 vote383 views1 answer
Multi filtering react
Javascript React