我正在研究我(遗憾地)不能使用jQuery的项目。我需要做一些简单的jQuery,但我不能用纯JavaScript做。所以,我需要使用另一个响应来运行一个ajax请求。在jQuery中它看起来像:
$.get("date.php", "", function(data) {
var date=data;
$("#date").load("doku.php?id="+date.replace(" ", "_")+" #to_display", function() {
$(document.createElement("strong")).html("<a href=\"doku.php?id="+date.replace(" ", "_")+"\">"+date+"</a>:").prependTo($(this));
});
});
这是我在纯JS中无法正常工作的代码:
if (window.XMLHttpRequest)
{
ObiektXMLHttp = new XMLHttpRequest();
} else if (window.ActiveXObject)
{
ObiektXMLHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
if(ObiektXMLHttp)
{
ObiektXMLHttp.open("GET", "date.php");
ObiektXMLHttp.onreadystatechange = function()
{
if (ObiektXMLHttp.readyState == 4)
{
var date = ObiektXMLHttp.responseText;
if (window.XMLHttpRequest)
{
ObiektXMLHttp = new XMLHttpRequest();
} else if (window.ActiveXObject)
{
ObiektXMLHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
ObiektXMLHttp.open("GET", "doku.php?id="+date.replace(" ", "_"));
ObiektXMLHttp.onreadystatechange = function()
{
if (ObiektXMLHttp.readyState == 4)
{
alert(ObiektXMLHttp.responseText);
}
}
}
}
ObiektXMLHttp.send(null);
}
我在做什么?
答案 0 :(得分:1)
您忘记在第二个案例中致电ObiektXMLHttp.send(null);
:
//....
ObiektXMLHttp.open("GET", "doku.php?id="+date.replace(" ", "_"));
ObiektXMLHttp.onreadystatechange = function() {
if (ObiektXMLHttp.readyState == 4)
{
alert(ObiektXMLHttp.responseText);
}
};
//Here
ObiektXMLHttp.send(null);
答案 1 :(得分:1)
这样的事情(天真的原型):
// xhr object def
var xhr = {
obj: function() {
if (window.XMLHttpRequest) {
return new XMLHttpRequest();
} else if (window.ActiveXObject) {
return new ActiveXObject("Microsoft.XMLHTTP");
}
throw new Error("can't init xhr object");
},
get: function(url, fn) {
var xhr = this.obj();
xhr.onreadystatechange = function() {
if (xhr.readyState == 4) {
fn(xhr.responseText);
}
};
xhr.open("GET", url);
xhr.send(null);
}
};
// implementation
xhr.get("date.php", function(data){
xhr.get("doku.php?id=" + data.replace(" ", "_"), function(data){
alert(data);
});
});
答案 2 :(得分:0)
目前还不清楚你错了什么(你能告诉我们吗?),但我建议依靠这样的辅助功能:
function xhrGet(url, callback) {
if (window.XMLHttpRequest)
var xhr = new XMLHttpRequest();
else if (window.ActiveXObject)
var xhr = new ActiveXObject("Microsoft.XMLHTTP");
if (!xhr) return;
xhr.open("GET", url);
xhr.onreadystatechange = function() {
if (xhr.readyState !== 4) return;
if (typeof callback === "function") callback(xhr);
};
xhr.send(null);
return xhr;
}
所以你要做的就是使用这个功能:
xhrGet("date.php", function(x1) {
xhrGet("doku.php?id=" + date.replace(" ", "_"), function(x2) {
// do stuff
// x1 and x2 are respectively the XHR object of the two requests
});
});