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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <section id="index" class="wrapper"></section>
<section class="instruction">
  <h1 class="u-title">Custom Audio Player</h1>

  <p>User can: </p>
  <ol>
    <li>Play the audio</li>
    <li>Pause the audio</li>
    <li>Change audio position using the slider (with mouse / keyboard)</li>
  </ol>

  <p>In the slider, user can:</p>
  <ul>
    <li>Use mouse or keyboard to change current time of audio</li>
    <li>Can focus the slider</li>
    <li>Can use mouse to change position</li>
    <li>Can use left or right key in keyboard to change position</li>
  </ul>

  <p>Keybindings for slider (after focused):</p>
  <li>Top: to 100 (max)</li>
  <li>Bottom: to 0 (min)</li>
  <li>Left: -1 step</li>
  <li>Right: +1 step</li>
  <li>Top: +10 steps</li>
  <li>Bottom: -10 steps</li>
</section>
            
          
!
            
              $theme: #ccc;

//media query
$mobile: "only screen and (min-width : 576px)";
$laptop: "only screen and (min-width : 992px)";

/*------------------------------------*\
  #Base
\*------------------------------------*/

body {
  font-family: "Lato", "Calibri", sans-serif;
  width: 100%;
  height: auto;
  min-height: 100%;
  background: white;
  line-height: 1.48;
  margin: 0;
  padding: 1em;
  overflow: auto;
}

html {
  width: 100%;
  margin: 0;
  padding: 0;
  overflow: auto;
}

* {
  box-sizing: border-box;
}

header,
section {
  margin-bottom: 4em;

  @media #{$mobile} {
    margin-bottom: 2em;
  }
}

/*------------------------------------*\
  #Audio Player
\*------------------------------------*/

.u-bg {
  position: relative;
  display: block;
  background-image: none !important;
  width: auto;
  height: auto;
  margin: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.c-audio {
  display: flex;
  align-items: center;
  width: 100%;
  height: auto;
  background: $theme;
  border-radius: 0.25em;
  padding: 0 1em 0 0;

  .l-play {
    position: relative;
    justify-content: center;
    appearance: none;
    width: 12%;
    min-width: 40px;
    height: 40px;
    border: 0;
    background: $theme;
    color: white;
    text-align: center;
    cursor: pointer;
    border-radius: 0;
    padding: 0;

    &:focus {
      outline: none;
      box-shadow: 1px 1px 1px 0px rgba(25,25,25,0.2);
    }

    &__play,
    &__pause {
      background-size: contain;
      background-position: center;
      background-repeat: no-repeat;
    }

    &__play {
      background-image: url('data:image/svg+xml;utf8,<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 100 100" style="enable-background:new 0 0 100 100;" xml:space="preserve"><g id="playbtn"><g transform="translate(-670.000000, -353.000000)"><path id="play_btn" style="fill:%23FFFFFF;" d="M740.3,403.5l-31.7-20.8v41.6L740.3,403.5z"/></g></g></svg>');
    }

    &__pause {
      background-image: url('data:image/svg+xml;utf8,<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 100 100" style="enable-background:new 0 0 100 100;" xml:space="preserve"><g id="pause"><g transform="translate(-968.000000, -353.000000)"><path id="pause_btn" style="fill:%23FFFFFF;" d="M1003.6,382.7v41.6h7.9v-41.6H1003.6z M1025.4,382.7v41.6h7.9v-41.6H1025.4z"/></g></g></svg>');
    }
  }

  &__slider {
    position: relative;
    display: flex;
    align-items: center;
    width: 88%;
    height: 40px;
    overflow: hidden;
    cursor: pointer;

    &:focus {
      outline: none;
      box-shadow: 1px 1px 1px 0px rgba(25,25,25,0.2);
    }
  }

  &__length {
    position: relative;
    width: 100%;
    height: 0.4em;
    border-radius: 0.5em;
    background: rgba(19, 19, 19, 0.3);
    overflow: hidden;
  }

  &__bar {
    position: absolute;
    display: block;
    left: 0;
    top: 0;
    width: 100%;
    height: 0.4em;
    border-radius: 0.5em;
    border: 0;
    appearance: none;
    transition: none;
    overflow: hidden;
    fill: white;
    stroke: none;

    &:focus {
      outline: 1;
      box-shadow: 13px 12px 12px -4px rgba(19, 19, 19, 0.5);
    }
  }
}

            
          
!
            
              class Player extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      isPlay: null,
      currDuration: 0,
      percentage: 0,
      seekBar: 0
    };
    this.audioFile = React.createRef();
    this.audioSeekBar = React.createRef();
    this.getCurrDuration = this.getCurrDuration.bind(this);
    this.controlAudio = this.controlAudio.bind(this);
    this.onClick = this.onClick.bind(this);
    this.onKeyDown = this.onKeyDown.bind(this);
  }

  getCurrDuration() {
    const audio = this.audioFile.current;
    const percentage = ((audio.currentTime / audio.duration) * 100).toFixed(2);

    // get current percentage and duration
    this.setState({
      currDuration: audio.currentTime,
      percentage
    });
  }

  controlAudio() {
    const audio = this.audioFile.current;
    if (audio.duration > 0 && !audio.paused) {
      // pause audio and stop counting
      audio.pause();
      this.setState({
        isPlay: false
      });
    } else {
      // play audio
      audio.play();
      this.setState({
        isPlay: true
      });
    }
  }

  onKeyDown(e) {
    // when user focus in audio slider and clicks keys inside key list, will change current time of audio
    const audio = this.audioFile.current;
    const isLeft = 37;
    const isRight = 39;
    const isTop = 38;
    const isBottom = 40;
    const isHome = 36;
    const isEnd = 35;
    const keyList = [isLeft,isRight,isTop,isBottom,isHome,isEnd];

    if (keyList.indexOf(e.keyCode) >= 0) {
      let percentage;
        switch(e.keyCode) {
          case isLeft:
            percentage = parseFloat(this.state.percentage) - 1
            break;
          case isRight:
            percentage = parseFloat(this.state.percentage) + 1
            break;
          case isTop:
            percentage = parseFloat(this.state.percentage) + 10
            break;
          case isBottom:
            percentage = parseFloat(this.state.percentage) - 10
            break;
          case isHome:
            percentage = 0
            break;
          case isEnd:
            percentage = 99.9 // 100 would trigger onEnd, so only 99.9
            break;
          default:
            break;
        }
      
       // add boundary for percentage, cannot be bigger than 100 or smaller than zero
      if(percentage > 100) {
        percentage = 100
      } else if(percentage < 0) {
        percentage = 0
      }
        
        this.setState({
          percentage
        });

        audio.currentTime = audio.duration * (percentage / 100);
    }
  }

  onClick(e) {
    const seekBar = this.audioSeekBar.current;
    const audio = this.audioFile.current;

    const pos =
      (e.pageX -
        (seekBar.getBoundingClientRect().x ||
          seekBar.getBoundingClientRect().left)) /
      seekBar.getClientRects()[0].width;

    this.setState({
      percentage: pos * 100
    });

    audio.currentTime = audio.duration * pos;
  }

  render() {
    const { percentage, isPlay } = this.state;
    const { path, image } = this.props;
    return (
      <React.Fragment>
        <div className="u-bg" style={{ backgroundImage: `url("${image}")` }}>
          <div className="c-audio" aria-label="Audio Player" role="region">
            <button
              title={!isPlay || isPlay === null ? 'Play' : 'Pause'}
              className={
                !isPlay || isPlay === null
                  ? 'c-audio u-btn l-play l-play__play'
                  : 'c-audio u-btn l-play l-play__pause'
              }
              aria-controls="audio1"
              onClick={this.controlAudio}
              aria-label={!isPlay || isPlay === null ? 'Play' : 'Pause'}
            />
            <div
              className="c-audio__slider"
              onKeyDown={this.onKeyDown}
              onClick={this.onClick}
              tabIndex="0"
              aria-valuetext="seek audio bar"
              aria-valuemax="100"
              aria-valuemin="0"
              aria-valuenow={Math.round(percentage)}
              role="slider"
              ref={this.audioSeekBar}
            >
              <div className="c-audio__length">
                <svg
                  className="c-audio__bar"
                  viewBox="0 0 100% 6"
                  xmlns="http://www.w3.org/2000/svg"
                >
                  <rect x="0" width={percentage + '%'} height="6" rx="3" />
                </svg>
              </div>
            </div>
          </div>
        </div>

        <audio
          className="c-audio__sound"
          id="audio1"
          src={path}
          onTimeUpdate={this.getCurrDuration}
          onEnded={() => {
            this.audioFile.current.currentTime = 0;
            this.setState({
              isPlay: false,
              currentTime: 0,
              percentage: 0
            });
          }}
          ref={this.audioFile}
        >
          <track kind="captions" />
        </audio>
      </React.Fragment>
    );
  }
}

Player.propTypes = {
  path: PropTypes.string,
  image: PropTypes.string
};

class App extends React.Component {
  render() {
    return (
      <Player
        path="https://cdn.atrera.com/audio/Marcel_Pequel_-_01_-_One.mp3"
        image="https://cdn.atrera.com/images/cover_yz2mak.jpg"
      />
    );
  }
}


ReactDOM.render(<App />, document.getElementById("index"));
            
          
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