<main>
  <h2>CSS Animations: the <code>animation-delay</code> Property</h2>

  <p>The animation below will run when the Animate button is clicked but it will be subject to the selected delay value.</p>

  <div class="box">
  </div>

  Delay: <input type="number" step="0.1" id="delay" value="1" min="-10" max="10"> Iterations: <input type="number" step="0.1" id="iteration" value="1" min="0">

  <br>

  <button>Animate the Box</button> <button disabled>Reset</button>

</main>
body {
  font-family: Arial, sans-serif;
  font-size: 20px;
  padding: 0 20px;
}

main {
  text-align: center;
  margin: 0 auto;
  max-width: 800px;
}

p {
  padding: 0 20px;
}

code {
  color: firebrick;
}

.box {
  width: 100px;
  height: 100px;
  background: aqua;
  border: solid 2px;
  margin-bottom: 20px;
}

.box-animate {
  animation-name: moveObject;
  animation-duration: 2s;
  animation-direction: alternate;
  animation-timing-function: linear;
  animation-fill-mode: forwards;
}

@keyframes moveObject {
  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(600px);
  }
}

input[type=number] {
  width: 60px;  
}

button {
  margin-top: 20px;
}
console.clear();

let myObject = document.querySelector('.box'),
    btn1 = document.querySelector('button'),
    btn2 = document.querySelectorAll('button')[1],
    delay = document.querySelector('#delay'),
    iteration = document.querySelector('#iteration');

btn1.addEventListener('click', function () {
  myObject.classList.add('box-animate');
  myObject.style.animationDelay = delay.value + 's';
  myObject.style.animationIterationCount = iteration.value;
  this.disabled = true;
  btn2.disabled = false;
}, false);

btn2.addEventListener('click', function () {
  myObject.classList.remove('box-animate');
  this.disabled = true;
  btn1.disabled = false;
}, false);

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