How do I make JavaScript beep?

beep,

引言

如何讓瀏覽器發出嗶嗶聲。

參考文件

How do I make JavaScript beep?Stack Overflow

原始碼紀錄 - 法一

直接包裝成全域函式。

index.html
<script>
   //if you have another AudioContext class use that one, as some browsers have a limit
   var audioCtx = new (window.AudioContext || window.webkitAudioContext || window.audioContext);

   //All arguments are optional:
   //duration of the tone in milliseconds. Default is 500
   //frequency of the tone in hertz. default is 440
   //volume of the tone. Default is 1, off is 0.
   //type of tone. Possible values are sine, square, sawtooth, triangle, and custom. Default is sine.
   //callback to use on end of tone
   function beep(duration, frequency, volume, type, callback) {
     var oscillator = audioCtx.createOscillator();
     var gainNode = audioCtx.createGain();

     oscillator.connect(gainNode);
     gainNode.connect(audioCtx.destination);

     if (volume) { gainNode.gain.value = volume; }
     if (frequency) { oscillator.frequency.value = frequency; }
     if (type) { oscillator.type = type; }
     if (callback) { oscillator.onended = callback; }

     oscillator.start(audioCtx.currentTime);
     oscillator.stop(audioCtx.currentTime + ((duration || 500) / 1000));
   };
 </script>

原始碼紀錄 - 法二

包裝成動態模組。