Javascript: InvalidStateError:DOM Exception 11

Javascript: InvalidStateError:DOM Exception 11

本文关键字：Exception InvalidStateError Javascript DOM      更新时间：2023-09-26

我有下面处理HTTP请求的代码。但我得到

错误：InvalidStateError:DOM异常11

错误。

if (window.XMLHttpRequest) {
        req_settings = new XMLHttpRequest();
        req_settings.onreadystatechange = processChange;
        req_settings.open("GET", url, true);
        req_settings.send();
    } else if (window.ActiveXObject) {
        req_settings = new ActiveXObject("Microsoft.XMLHTTP");
        if (req_settings) {
            req_settings.onreadystatechange = processChange;
            req_settings.open("GET", url, true);
            req_settings.send();
        }
    } 
    req_settings.onreadystatechange = processChange; 
    req_settings.send();

请帮忙。

您正在调用send()两次，这是无效的。你的代码应该是

if (window.XMLHttpRequest) {
    var req_settings = new XMLHttpRequest();
} else if (window.ActiveXObject) {
    req_settings = new ActiveXObject("Microsoft.XMLHTTP");
} else
    throw "environment does not support ajax";
req_settings.onreadystatechange = processChange;
req_settings.open("GET", url, true);
req_settings.send();

该代码毫无意义，您将调用

req_settings.onreadystatechange = processChange; 
req_settings.send();

两次，在if里面做，在if外面做！把里面的拿走。此外，它应该使用本机对象。使用图书馆！

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