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import React, { useState } from "react";
import "./App.css";

const App = () => {
  const [counterA, setCounterA] = useState(0);
  const [counterB, setCounterB] = useState(0);

  return (
    <div>
      <button
        onClick={() => {
          setCounterA(counterA + 1);
        }}
      >
        Increment A
      </button>
      <button
        onClick={() => {
          setCounterB(counterB + 1);
        }}
      >
        Increment B
      </button>
      <div>counterA: {counterA}</div>
      <div>counterB: {counterB}</div>
    </div>
  );
};

export default App;
import React, { useState } from 'react'

const MyComponent = () => {
  const [toggle, setToggle] = useState(false)

  return(
    <>
      <button onClick={() => setToggle(!toggle)}>Toggle Dropdown Markup</button>
      {toggle && (
        <ul>
          <li>Show me</li>
          <li>Only when</li>
          <li>Toggle === true</li>
        </ul>
      )}
    </>
  )
}
//app.js
import React, { useState } from 'react';
import './App.css';

function App() {
  const [firstDieResult, setFirstDieResult] = useState(1);
  const [secondDieResult, setSecondDieResult] = useState(6);
  //OR
  //const [diceResult, setDiceResult] = useState({
  	//firstDieResult: 1,
  	//secondDieResult: 6,
	//});

  const firstDieImage = require(`./assets/${firstDieResult}.png`);
  const secondDieImage = require(`./assets/${secondDieResult}.png`);

  function rollDice() {
    setFirstDieResult(Math.floor(Math.random() * 6) + 1);
    setSecondDieResult(Math.floor(Math.random() * 6) + 1);
  }

  return (
    <div className="App">
      <header className="App-header">
        <div style={{ display: 'flex', margin: 20 }}>
          <img src={firstDieImage} className="die" alt="Die one" />
          <img src={secondDieImage} className="die" alt="Die two" />
        </div>
        <span>{firstDieResult + secondDieResult}</span>
        <button className="button" onClick={rollDice}>Roll</button>
      </header>
    </div>
  );
}

export default App;

//css

.App {
  text-align: center;
}

.App-header {
  background-color: #282c34;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: calc(16px + 2vmin);
  color: white;
}

.die {
  width: 50px;
  height: 50px;
  margin: 10px;
}

.button {
  margin-top: 20px;
  outline: none;
  animation: button-gradient 25s ease infinite;
  background-image: -webkit-linear-gradient(65deg,#21d4fd,#b721ff 50%,#017eff);
  background-image: linear-gradient(25deg,#21d4fd,#b721ff 50%,#017eff);
  background-size: 500%;
  border: none;
  border-radius: 3px;
  box-shadow: 0 3px 0 0 #5664a7;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  height: 40px;
  width: 150px;
}

.button:hover {
  box-shadow: 0 2px 0 0 #5664a7;
}

.button:active {
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.25), 0 1px 2px rgba(0,0,0,0.05);
}
// get images => https://upmostly.com/wp-content/uploads/react-dice-assets.zip
this.setState({ name: 'Matt' }, () => console.log(this.state.name))
star

Tue Jun 29 2021 10:10:50 GMT+0000 (UTC) https://dommagnifi.co/2020-12-03-toggle-state-with-react-hooks/

#react.js #javascript #react #usestate #setstate
star

Thu Oct 15 2020 07:52:45 GMT+0000 (UTC) https://dev.to/thawkin3/3-react-mistakes-junior-developers-make-with-component-state-1bhd?utm_source

#react.js #setstate

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