jQuery toggleClass example

Toggle class name on click in jQuery

by nikolya223

HTML

<button onclick="beep(1000, 0.5)"> старт </button>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#banner-message {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  font-size: 25px;
  text-align: center;
  transition: all 0.2s;
  margin: 0 auto;
  width: 300px;
}

button {
  background: #0084ff;
  border: none;
  border-radius: 5px;
  padding: 8px 14px;
  font-size: 15px;
  color: #fff;
}

#banner-message.alt {
  background: #0084ff;
  color: #fff;
  margin-top: 40px;
  width: 200px;
}

#banner-message.alt button {
  background: #fff;
  color: #000;
}

JavaScript

function beep(f, d){ // частота в герцах, длительность в секундах
    var ctx = new AudioContext();
    var oscillator = ctx.createOscillator();
    oscillator.frequency.value = f;
    oscillator.connect(ctx.destination);
    oscillator.start();
    oscillator.stop(d);
}