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Check if there are images with a missing ALT attribute

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var images = document.querySelectorAll('img');
var image;
var noAlt = [];

for (var i = 0; i < images.length; i++) {
    image = images[i];

    if (!image.alt) {
        image.setAttribute("style", "box-shadow: 0 0 0 10px red");
        noAlt.push(image);
    }
}

alert("Images with ALT missing: " + noAlt.length);
console.log(noAlt);

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