使用替代文本查找图像标签

Finding an image tag using the alt text(使用替代文本查找图像标签)

问题描述

我想知道是否可以使用 Javascript 通过其 alt 文本查找图像标签.例如我有这个标签: <img src="TXlpbWFnZS5qcGc=" alt="TXlpbWFnZQ=="> 有没有办法通过查找Myimage"alt 属性来获取标签?

I would like to know if it was possible using Javascript to find an image tag by its alt text. For instance I have this tag: <img src="TXlpbWFnZS5qcGc=" alt="TXlpbWFnZQ=="> would there be a way to obtain the tag by looking for the "Myimage" alt attribute?

推荐答案

毫无疑问，很快就会有 jQuery 解决方案发布.要做到这一点，以下将起作用:

There will undoubtedly be a jQuery solution posted soon enough. To do it without, the following will work:

function getImagesByAlt(alt) {
    var allImages = document.getElementsByTagName("img");
    var images = [];
    for (var i = 0, len = allImages.length; i < len; ++i) {
        if (allImages[i].alt == alt) {
            images.push(allImages[i]);
        }
    }
    return images;
}

var myImage = getImagesByAlt("Myimage")[0];

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