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This feature is well established and works across many devices and browser versions. Its been available across browsers since 2015 ..
XMLHttpRequest.getResponseHeader() , (header). , , " + ". getResponseHeader() UTF.
var myHeader = getResponseHeader(name);
ByteString, , .
ByteString, null, name .
var client = new XMLHttpRequest();
client.open("GET", "unicorns-are-teh-awesome.txt", true);
client.send();
client.onreadystatechange = function () {
if (this.readyState == this.HEADERS_RECEIVED) {
console.log(client.getResponseHeader("Content-Type"));
}
};
| Specification |
|---|
| XMLHttpRequest # dom-xmlhttprequest-getresponseheader |
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