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How to get ajax request header information in js
2. When I use XMLHttpRequest.header in the complete method of ajax, the value obtained is undefined. Is it undefined without this parameter?
3. If my above idea is wrong, please give me some advice
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Maybe this:var xhr = new XMLHttpRequest();xhr.open('get','',false);var headers = xhr.getAllResponseHeaders();xfr.send();
var request = new XMLHttpRequest();request.open("GET", "foo.txt", true);request.send();request.onreadystatechange = function() { if(this.readyState == this.HEADERS_RECEIVED) {
console.log(request.getAllResponseHeaders());
}}
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Maybe this:
var xhr = new XMLHttpRequest();
xhr.open('get','',false);
var headers = xhr.getAllResponseHeaders();
xfr.send();
var request = new XMLHttpRequest();
request.open("GET", "foo.txt", true);
request.send();
request.onreadystatechange = function() {
if(this.readyState == this.HEADERS_RECEIVED) {
}
}