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Cover image for Creating a Classic Car Rental App with Engine Sound Demo

Creating a Classic Car Rental App with Engine Sound Demo

codeswaps profile image CodeSwaps Updated on ・3 min read

Here is a little experiment using HTML5 audio to create an app mockup for an imaginary classic car rental service.

Basic markup

<div class="container">
  <div class="app">
    <img src="../codepen/mustang/app.png">
    <div class="wrapper">
      <div class="button-outer">
        <div class="glare"></div>
        <div class="shape-1">
          <div class="shape-2">
            <div class="shape-3">
              <button id="startEngine" class="btn">
                <span class="light"></span>
                <span class="sm">Engine</span>
<audio id="engine" src="../codepen/mustang/start.mp3"></audio>
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Add styles

  .wrapper {
    text-align: center;
    position: absolute;
    bottom: 50px;
    height: 290px;
    left: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 100px;
    transition: transform 1s;
    transform: translateX(-50%);
  .button-outer {
    background: linear-gradient(135deg, #4c4c4e 0%, #414141 34%, #6a6a6a 55%, #212121 100%);
    width: 290px;
    height: 290px;
    margin-left: 5px;
    margin-top: 5px;
    border-radius: 50%;
    box-shadow: 1px 1px 4px rgba(138, 135, 135, 0.68) inset;
    overflow: hidden;
    position: relative;
    transform: translateZ(3px);
    transform-style: preserve-3d;
  .shape-1 {
    width: 260px;
    height: 260px;
    background-color: #1e1e1e;
    position: absolute;
    top: 15px;
    left: 15px;
    border-radius: 50%;
    box-shadow: 3px 3px 1px 1px #505050 inset, 1px -1px 1px 1px #e6e6e6 inset;
  .shape-2 {
    width: 240px;
    height: 240px;
    border-radius: 50%;
    margin-left: 10px;
    margin-top: 10px;
    background-color: #101010;
    border: 1px solid rgba(94, 94, 94, .7);
    box-shadow: -2px -2px 1px rgba(168, 168, 168, 0.8) inset;
    transform: translateZ(5px);
  .shape-3 {
    width: 230px;
    height: 230px;
    margin-top: 5px;
    margin-left: 5px;
    background-color: #252525;
    border-radius: 50%;
    border: 1px solid #1c1c1c;
    box-sizing: border-box;
    box-shadow: -2px 3px 1px #5f5f5f inset;
  .glare {
    width: 220px;
    height: 250px;
    border-radius: 50%;
    background-color: #fff;
    margin-left: 35px;
    transform: translateY(-50px);
    box-shadow: 0 0 50px 37px #fff;
  .btn {
    -webkit-tap-highlight-color: transparent;
    background: #666;
    border-radius: 50%;
    width: 225px;
    height: 225px;
    margin-left: 2px;
    margin-top: 2px;
    border: 0;
    transition: all 0.1s;
    cursor: pointer;
    box-shadow: 0 0 10px 3px #000 inset, 0 -50px 100px rgba(0, 0, 0, 0.8) inset, 0 30px 60px rgba(0, 0, 0, 0.8) inset;
    box-sizing: border-box;
  .btn:active {
    box-shadow: 0 0 12px 5px #000 inset, 0 -60px 100px rgba(0, 0, 0, 0.8) inset, 0 50px 60px rgba(0, 0, 0, 0.8) inset;
    padding-top: 13px;
    background-position-y: 6px;
  .btn:focus {
    outline: none;
  span {
    font-family: sans-serif;
    text-transform: uppercase;
    font-weight: bold;
    font-size: 30px;
    color: #212121;
    transition: all 0.6s;
    display: block;
  .playing span {
    color: #C5DEA1;
    text-shadow: 0 0 15px #8CA579, 0 0 2px #fff;
  } {
    font-size: 20px;
  .light {
    width: 35px;
    height: 15px;
    margin: 0 auto;
    background-color: #212121;
    margin-bottom: 25px;
    border-radius: 7px;
    border: 1px solid #1b1b1b;
    transition: all 0.6s;
  .playing .light {
    background-color: #f9ea1a;
    border: 1px solid #923C14;
    box-shadow: 0 0 11px 3px #C94A29 inset, 0 0 32px 6px #C77713, 0 0 100px #fff
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Bringing it to life

let audioElem = document.getElementById("engine");
let startEngine = document.getElementById("startEngine");

startEngine.addEventListener("click", handlePlayButton, false);

async function playAudio() {
  try {
  } catch(err) {

function handlePlayButton() {
  if (audioElem.paused) {
  } else {
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Final result

About the author

Simon is a freelance web designer.


Button concept:
Image credit:

Discussion (1)

Editor guide
jakeadorn profile image
jakeadorn • Edited

It sounds interesting, but I am not sure that it is worth the try. If you have plans to add some extra features then take your chances and try it, but if not, then think more about it, because there already are a lot of apps available on the internet that can help you with different useful information or with different tasks. If you are interested, take a look at, it is well optimized and works absolutely awesome.