無法用Js停止音頻-有解無憂

我對 Javascript 有疑問：

我想在游戲結束時停止 Js 程式中的音頻。為此，我定義了一個變數“endGame”并將其設為假，這樣當我在事件中將其稱為真時，音頻就會停止。但問題是，當此變數設定為 true 時，音頻不會停止。

這是我需要幫助的一段代碼：

let endGame = false

main.addEventListener("click", (e) => {
    themeSong.play() 
    
    if(endGame == true) {
        themeSong.pause()
    }

uj5u.com熱心網友回復：

EventListeners 變數變化時不會觸發。您應該手動進行。

let endGame = false

main.addEventListener("click", (e) => {
    themeSong.play() 
});

// The function which updates the endGame variable and stop the audio
function fnEndGame() {
   endGame = true;
   themeSong.pause() 
}

// You should call fnEndGame() to stop the game, DO NOT update the variable directly.

uj5u.com熱心網友回復：

通過使用自定義事件，然后在需要時拋出該事件，您可以在需要的時候暫停音樂執行。

因此，我建議您不要使用“endgame”變數，而是拋出一個名為“supergame_endgame”的自定義事件并監聽該事件，并停止該事件監聽器中的所有相關音頻。

有關更多解釋，請參閱下面代碼中的注釋。

let audio = document.querySelector('audio');
let start = document.getElementById('play');
let stop = document.getElementById('stop');
/** simple starter of the sound **/
start.addEventListener('click', () => {
  audio.play();
});

/** Event handler for own custom event, named `stop_my_audio_play`
  * This will actually stop audio play, regardless from where the event `stop_my_audio_play` is
  * cast from
  */
window.addEventListener('stop_my_audio_play', (e) => {
  audio.pause();
});

/** Throw an event `stop_my_audio_play` with the attribute bubbles set to true
 * So it can be caught at window level
 */
stop.addEventListener('click', () => {
  stop.dispatchEvent(new Event('stop_my_audio_play', {bubbles:true}))
});

audio {
display:none;
}

<audio controls="controls" autobuffer="autobuffer" autoplay="autoplay" loop>
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</audio>

<button id="play">Play</button>
<button id="stop">Stop</button>

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標籤：javascript 声音的暂停

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