javascript - 将对象传递给 onreadystatechange

Question

我希望 AJAX 回调触发 myFucntion 中的 alert() 并显示“它有效”，如何在 ajaxResponse 中引用 myobject 对象？

function myobject() {
    this.val = "worked";

    http.onreadystatechange = function ajaxResponse() {
        if (http.readyState == 4) {
            this.myFunction();
        }

        http.send(null);  
    }

    myobject.prototype.myFunction = function() {
    alert("it "+this.val);
}

Answer 1

只需将父对象附加到 xhr 对象，如下所示:

http.parent = this; // Append it here
http.onreadystatechange = function ajaxResponse()
{
    if (http.readyState == 4)
        alert(this.parent.value) // Access it here
}