从XHR获取响应Content-Type标头 [英] Get the response Content-Type header from XHR
本文介绍了从XHR获取响应Content-Type标头的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想看看标题是text/html还是text/xml.如果它是text/html，那么有一个错误，我宁愿在继续之前抓住它.
I would like to see whether the header was text/html or text/xml. If it was text/html then there was an error and I would rather catch that before proceeding.
推荐答案
使用最小示例:
<script>
function hand () {
console.log(this.getResponseHeader('content-type'));
}
var x = new XMLHttpRequest();
x.onreadystatechange = hand;
x.open('GET', 'index.html', true);
x.send();
</script>
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