Keyboard Hero

index.html

<h1 class="title">Eyes on the screen</h1>
<div class="keyboard">
  <ul class="row row-0">
    <li class="pinky" id="esc">ESC</li>
    <li class="pinky" id="1">1</li>
    <li class="ring" id="2">2</li>
    <li class="middle" id="3">3</li>
    <li class="pointer1st" id="4">4</li>
    <li class="pointer2nd" id="5">5</li>
    <li class="pointer2nd" id="6">6</li>
    <li class="pointer1st" id="7">7</li>
    <li class="middle" id="8">8</li>
    <li class="ring" id="9">9</li>
    <li class="pinky" id="10">0</li>
    <li class="pinky" >-</li>
    <li class="pinky" >+</li>
    <li class="pinky" id="back">BACK</li>
  </ul>
  <ul class="row row-1">
    <li class="pinky" id="tab">TAB</li>
    <li class="pinky" id="Q">Q</li>
    <li class="ring" id="W">W</li>
    <li class="middle" id="E">E</li>
    <li class="pointer1st" id="R">R</li>
    <li class="pointer2nd" id="T">T</li>
    <li class="pointer2nd" id="Y">Y</li>
    <li class="pointer1st" id="U">U</li>
    <li class="middle" id="I">I</li>
    <li class="ring" id="O">O</li>
    <li class="pinky" id="P">P</li>
    <li class="pinky" >[</li>
    <li class="pinky" >]</li>
    <li class="pinky" >\</li>
  </ul>
  <ul class="row row-2">
    <li class="pinky" id="caps">CAPS</li>
    <li class="pinky" id="A">A</li>
    <li class="ring" id="S">S</li>
    <li class="middle" id="D">D</li>
    <li class="pointer1st" id="F">F</li>
    <li class="pointer2nd" id="G">G</li>
    <li class="pointer2nd" id="H">H</li>
    <li class="pointer1st" id="J">J</li>
    <li class="middle" id="K">K</li>
    <li class="ring" id="L">L</li>
    <li class="pinky" >:</li>
    <li class="pinky" >''</li>
    <li class="pinky" id="enter">ENTER</li>
  </ul>
  <ul class="row row-3">
    <li class="pinky" id="left-shift">SHIFT</li>
    <li class="pinky" id="Z">Z</li>
    <li class="ring" id="X">X</li>
    <li class="middle" id="C">C</li>
    <li class="pointer1st" id="V">V</li>
    <li class="pointer2nd" id="B">B</li>
    <li class="pointer2nd" id="N">N</li>
    <li class="pointer1st" id="M">M</li>
    <li class="middle" >,</li>
    <li class="ring" >.</li>
    <li class="pinky" >;</li>
    <li class="pinky" id="right-shift">SHIFT</li>
  </ul>
</div>
<h1 class="title">Hands on the keyboard</h1>

keyboard-hero.markdown

Keyboard Hero

A Pen by evilpaper on CodePen.

License.

script.js

const keys = [..."ABCDEFGHIJKLMNOPQRSTUVWXYZ"];

const timestamps = [];

timestamps.unshift(getTimestamp());

function getRandomNumber(min, max) {
    min = Math.ceil(min);
    max = Math.floor(max);
    return Math.floor(Math.random() * (max - min + 1)) + min;
}

function getRandomKey() {
  return keys[getRandomNumber(0, keys.length-1)]
}

function targetRandomKey() {
  const key = document.getElementById(getRandomKey());
  key.classList.add("selected");
  let start = Date.now()
}

function getTimestamp() {
  return Math.floor(Date.now() / 1000)
}

document.addEventListener("keyup", event => {
  const keyPressed = String.fromCharCode(event.keyCode);
  const keyElement = document.getElementById(keyPressed);
  const highlightedKey = document.querySelector(".selected");
  
  keyElement.classList.add("hit")
  keyElement.addEventListener('animationend', () => {
    keyElement.classList.remove("hit")
  })
  
  if (keyPressed === highlightedKey.innerHTML) {
    timestamps.unshift(getTimestamp());
    const elapsedTime = timestamps[0] - timestamps[1];
    console.log(`Character per minute ${60/elapsedTime}`)
    highlightedKey.classList.remove("selected");
    targetRandomKey();
  } 
})

targetRandomKey();

style.css

body {
  background-color: black;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-weight: 500;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.title {
  color: mintcream;
  text-transform: uppercase;
  margin-top: 3em;
  margin-bottom: 3em;
  font-size: 1em;
  letter-spacing: 0.3em;
}

.keyboard {
  display: flex;
  flex-direction: column;
}

.row {
  list-style: none;
  display: flex;
}

li {
  height: 3em;
  width: 3em;
  color: rgba(0,0,0,0.7);
  border-radius: 0.4em;
  line-height: 3em;
  letter-spacing: 1px;
  margin: 0.4em;
  transition: 0.3s;
  text-align: center;
  font-size: 1em;
}

#tab {
  width: 5em;
}

#caps {
  width: 6em;
}

#left-shift {
  width: 8em;
}

#enter {
  width: 6em;
}

#right-shift {
  width: 8em;
}

#back {
  width: 5em;
}

.pinky { 
  background-color: crimson;
  border: 2px solid crimson;
}
.pinky.selected {
  color: crimson;
}

.ring { 
  background-color: coral;
  border: 2px solid coral;
}
.ring.selected {
  color: coral;
}

.middle { 
  background-color: darkorange;
  border: 2px solid darkorange;
}
.middle.selected {
  color: darkorange;
}

.pointer1st { 
  background-color: gold;
  border: 2px solid gold;
}
.pointer1st.selected {
  color: gold;
}

.pointer2nd { 
  background-color: khaki;
  border: 2px solid khaki;
}
.pointer2nd.selected {
  color: khaki;
}

.fill-out-key {
  background-color: slategrey;
  border: 2px solid slategrey;
}

.selected {
  background-color: transparent;
  	-webkit-animation: vibrate-1 0.3s linear infinite both;
	        animation: vibrate-1 0.3s linear infinite both;
}

/* ----------------------------------------------
 * Generated by Animista
 * Licensed under FreeBSD License.
 * See http://animista.net/license for more info. 
 * w: http://animista.net, t: @cssanimista
 * ---------------------------------------------- */

.hit {
	-webkit-animation: hit 0.3s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
	        animation: hit 0.3s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
}

@-webkit-keyframes hit {
  0% {
    -webkit-transform: scale(1.2);
            transform: scale(1.2);
  }
  100% {
    -webkit-transform: scale(1);
            transform: scale(1);
  }
}
@keyframes hit {
  0% {
    -webkit-transform: scale(1.2);
            transform: scale(1.2);
  }
  100% {
    -webkit-transform: scale(1);
            transform: scale(1);
  }
}

@-webkit-keyframes vibrate-1 {
  0% {
    -webkit-transform: translate(0);
            transform: translate(0);
  }
  20% {
    -webkit-transform: translate(-2px, 2px);
            transform: translate(-2px, 2px);
  }
  40% {
    -webkit-transform: translate(-2px, -2px);
            transform: translate(-2px, -2px);
  }
  60% {
    -webkit-transform: translate(2px, 2px);
            transform: translate(2px, 2px);
  }
  80% {
    -webkit-transform: translate(2px, -2px);
            transform: translate(2px, -2px);
  }
  100% {
    -webkit-transform: translate(0);
            transform: translate(0);
  }
}
@keyframes vibrate-1 {
  0% {
    -webkit-transform: translate(0);
            transform: translate(0);
  }
  20% {
    -webkit-transform: translate(-2px, 2px);
            transform: translate(-2px, 2px);
  }
  40% {
    -webkit-transform: translate(-2px, -2px);
            transform: translate(-2px, -2px);
  }
  60% {
    -webkit-transform: translate(2px, 2px);
            transform: translate(2px, 2px);
  }
  80% {
    -webkit-transform: translate(2px, -2px);
            transform: translate(2px, -2px);
  }
  100% {
    -webkit-transform: translate(0);
            transform: translate(0);
  }
}