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@gregwhitworth
Last active September 4, 2016 08:09
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Responsive images feature detection
(function (window) {
document.addEventListener("DOMContentLoaded", function (e) {
var supports = {
srcset: false,
currentSrc: false,
sizes: false,
picture: false
};
var img = new Image();
if ("srcset" in img) {
supports.srcset = true;
}
if ("currentSrc" in img) {
supports.currentSrc = true;
}
if ("sizes" in img) {
supports.sizes = true;
}
if ("HTMLPictureElement" in window) {
supports.picture = true;
}
console.log('Picture support: ' + supports.picture);
console.log('sizes support: ' + supports.sizes);
console.log('srcset support: ' + supports.srcset);
console.log('currentSrc support: ' + supports.currentSrc);
});
}(this));
@wikt0r
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wikt0r commented Jun 17, 2015

Would you be so kind to explain me why DOMContentLoaded event is necessary? If you run these checks before DOMContentLoaded, you will get different results?

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