Question

在下面的switch语句期间，我遇到了（似乎是）随机承诺错误。我创建了一个随机数，并将其与给定的数组项位置相关联。我在switch语句中使用此位置播放特定的声音。在浏览器中进行测试时，有时会出现如下承诺异常：

playSound @ game.js:29
nextSequence @ game.js:18
(anonymous) @ game.js:45

即使我收到此错误，一切都按预期工作。编辑部分：使用调试器进行调试时；上面的内容间歇地出现

//store colors

var buttonColors = [
    "green", //0
    "red", //1
    "yellow", //2
    "blue" //3
]

gamePattern = [ /*Added From nextSequence*/ ]

//Generate a random number
function nextSequence() {
    randomNumber = Math.floor(Math.random() * 4)
    randomChosenColor = buttonColors[randomNumber];
    gamePattern.push(randomChosenColor);
    $(`#` + randomChosenColor).fadeOut(100).fadeIn(100).delay(200);
    playSound(randomChosenColor);
}

function playSound(color) {
    switch (color) {
        case 'green':
            var greenButton = new Audio('sounds/green.mp3');
            greenButton.play();
            break;
        case 'red':
            var redButton = new Audio(`sounds/red.mp3`);
            redButton.play();
            break;
        case `yellow`:
            var yellowButton = new Audio(`sounds/yellow.mp3`);
            yellowButton.play();
            break;
        case `blue`:
            var blueButton = new Audio(`sounds/blue.mp3`);
            blueButton.play();
            break;
        default:
            console.log(`Play Sound Error in playSound Function`)
    }
}


nextSequence();

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

Javascript，什么是未捕获的（承诺的）DOMException？

0 个答案: