我正在尝试从页面加载的结果中将数组中的随机图像显示在屏幕上。我知道页面成功获取了随机的img src,但是物理图像从未出现。我需要在html中引用它吗?我将如何获取该随机图像src以制作可见图像。
<!DOCTYPE html>
<html>
<head>
<title>Hiragana Flash Cards</title>
</head>
<body>
<h2>Hiragana Flash Cards</h2>
<script>
var imgArray = new Array();
imgArray[0] = new Image();
imgArray[0].src = 'a.png';
imgArray[1] = new Image();
imgArray[1].src = 'i.png';
imgArray[2] = new Image();
imgArray[2].src = 'u.png';
imgArray[3] = new Image();
imgArray[3].src = 'e.png';
imgArray[4] = new Image();
imgArray[4].src = 'o.png';
imgArray[5] = new Image();
imgArray[5].src = 'ka.png';
function imgRandom(imgArr) {
return imgArr[Math.floor(Math.random() * imgArr.length)];
}
console.log(imgRandom(imgArray));
</script>
</body>
</html>
答案 0 :(得分:0)
您需要将图像添加到文档:
var imgArray = new Array();
imgArray[0] = new Image();
imgArray[0].src = 'a.png';
imgArray[1] = new Image();
imgArray[1].src = 'i.png';
imgArray[2] = new Image();
imgArray[2].src = 'u.png';
imgArray[3] = new Image();
imgArray[3].src = 'e.png';
imgArray[4] = new Image();
imgArray[4].src = 'o.png';
imgArray[5] = new Image();
imgArray[5].src = 'ka.png';
function imgRandom(imgArr) {
return imgArr[Math.floor(Math.random() * imgArr.length)];
}
var randomImage = imgRandom(imgArray); //Create the image
document.getElementById('container').appendChild(randomImage); // Append the image
<!DOCTYPE html>
<html>
<head>
<title>Hiragana Flash Cards</title>
</head>
<body>
<h2>Hiragana Flash Cards</h2>
<!--You can place the image here -->
<div id="container"></div>
</body>
</html>
查看appendChild()文档
答案 1 :(得分:0)
像这样将它附加到身体上
document.body.append(imgRandom(imgArray));
答案 2 :(得分:0)
您可以修改 img 标记的 src 变量并将其设置为图像URL。
var imgArray = new Array();
imgArray[0] = new Image();
imgArray[0].src = 'blue.png';
imgArray[1] = new Image();
imgArray[1].src = 'green.png';
function imgRandom(imgArr) {
return imgArr[Math.floor(Math.random() * imgArr.length)];
}
document.getElementById("random").src = imgRandom(imgArray).src;
console.log(imgRandom(imgArray));
<!DOCTYPE html>
<html>
<head>
<title>Hiragana Flash Cards</title>
</head>
<body>
<h2>Hiragana Flash Cards</h2>
<img id="random">
</body>
</html>
document.getElementById("random").src = imgRandom(imgArray).src;