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[英]Why does Angular say “Uncaught ReferenceError: $scope is not defined”?
[英]Why does my browser say “uncaught referenceerror” here?
我只是在瀏覽器中進行一些測試,以了解發生了什么-直到這一行,一切似乎都可以正常工作:
responseJson = JSON.parse(localReq.responseText);
當我評估這部分時:JSON.parse(localReq.responseText); 我得到適當的價值。 但是,當我評估“ responseJson”時,它給了我一個未捕獲的參考錯誤,我不知道為什么。
function login()
{
userName = document.getElementById("_name").value;
password = document.getElementById("_password").value;
data = "userName=" + userName + "&" + "password=" + password;
localReq = new XMLHttpRequest();
localReq.open("POST", "http://universe.tc.uvu.edu/cs2550/assignments/PasswordCheck/check.php", true);
localReq.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
localReq.send(data);
response = document.getElementById("_login");
if (localReq.status == 200)
{
responseJson = JSON.parse(localReq.responseText);
}
}
您需要在AJAX請求上使用事件偵聽器,以通過回調異步處理來自服務器的響應。 通過不這樣做,您正在服務器響應之前檢查響應代碼200
。
function login(){
userName = "username";
password = "password";
data = "userName=" + userName + "&" + "password=" + password;
localReq = new XMLHttpRequest();
// use an event handler here
localReq.addEventListener("load", function(evt){
if (localReq.status == 200) {
responseJson = JSON.parse(localReq.responseText);
alert("Success: " + localReq.responseText);
} else {
alert("Not Success!= :(");
console.log(localReq);
}
});
localReq.open("POST", "http://universe.tc.uvu.edu/cs2550/assignments/PasswordCheck/check.php", true);
localReq.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
localReq.send(data);
}
看到這個jsFiddle: http : //jsfiddle.net/wwsj3r4q/
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