<div class="app">
  <h2>The key Property<br>Press Any Key</h2>
  <div id="keypress" class="alert"></div>
  <div id="keydown" class="alert"></div>
</div>
html, body {
  display: grid;
  justify-items: center;
  align-items: center;
  font-family: sans-serif;
  
  width: 100%;
  height: 100%;
}

.app {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-gap: 10px;
}

h2 {
  text-align:center;
  grid-column: span 2;
}

h4 {
  font-size: 1rem;
  font-weight: normal;
  margin: 0;
  padding: 0;
}

.alert {
  display: grid;
  justify-items: center;
  align-items: center;
  
  width: 150px;
  height: 150px;
  
  background-color: rgba(0, 0, 0, 0.8);
  border-radius: 5px;
  color: #fff;
  font-size: 2rem;
  font-weight: bold;
  text-align: center;
  opacity: 0;
  visibility: hidden; 
  transition: 0.5s;
}

.show {
  opacity: 1;
  visibility: visible;
}

@keyframes fade-in-out {
  0%, 100% {
    opacity: 0;
    visibility: hidden;
  }
  
  1%, 99% {
    opacity: 1;
    visiblity: visible;
  }
}
const keypress = document.getElementById('keypress')
const keydown = document.getElementById('keydown')
let timer1 = null
let timer2 = null


document.addEventListener('keypress', function(e) {
  if (timer1) {
    clearTimeout(timer1)
  }

  keypress.innerHTML = `
    <div>
      <h4>Keypress</h4><br>
      ${e.key}
    </div>`
  
  keypress.classList.add('show')
  
  timer1 = setTimeout(function() {
    keypress.classList.remove('show')
  }, 5000)
})

document.addEventListener('keydown', function(e) {
  if (timer2) {
    clearTimeout(timer2)
  }

  keydown.innerHTML = `
    <div>
      <h4>Keydown</h4><br>
      ${e.key}
    </div>`
  
  keydown.classList.add('show')
  
  timer2 = setTimeout(function() {
    keydown.classList.remove('show')
  }, 5000)
})

External CSS

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External JavaScript

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