我有一个用Google Closure编译器编译的Javascript文件,它给了我这个错误TypeError: f is undefined
。当我查看编译后的代码时,它是不可能理解的,但它的一大部分被注释掉了。我真的很难过为什么我会收到这个错误,但我怀疑它与以下脚本有关(这是我自编辑此错误以来唯一编辑的内容)。
var response;
var request = new goog.net.XhrIo();
goog.events.listen(request, "complete", function(){
if (request.isSuccess()) {
response = request.getResponseText();
console.log("Satus code: ", request.getStatus(), " - ", request.getStatusText());
} else {
console.log(
"Something went wrong in the ajax call. Error code: ", request.getLastErrorCode(),
" - message: ", request.getLastError()
);
}
});
request.send("load_vocab.php");
var rawVocab = response[rawVocab];
var optionVocab = response[optionVocab];
alert(rawVocab.length);
alert(optionVocab.length);
这里也是load_vocab.php ...
try {
$conn = new PDO('mysql:host=localhost;dbname=tygrif_school', $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$stmt = $conn->prepare('SELECT word, translation, example_sentence_1 FROM vocabulary_game WHERE game_type = :game_type');
$stmt->execute(array('game_type' => 'target'));
while ($row = $stmt->fetch(PDO::FETCH_OBJ)) {
$data['rawVocab'][] = $row;
}
$stmt = $conn->prepare('SELECT word, translation FROM vocabulary_game');
$stmt->execute(array());
while ($row = $stmt->fetch(PDO::FETCH_OBJ)) {
$data['optionVocab'][] = $row;
}
} catch(PDOException $e) {
echo 'ERROR: ' . $e->getMessage();
}
echo json_encode($data);
答案 0 :(得分:1)
我认为问题在于:
var rawVocab = response[rawVocab];
var optionVocab = response[optionVocab];
您没有正确引用您的媒体访问者。试试这个:
var rawVocab = response['rawVocab'];
var optionVocab = response['optionVocab'];
答案 1 :(得分:1)
你知道xhr请求是异步的吗?
这意味着当您调用send时,您必须等待响应返回,您所做的是尝试读取下一行的响应。您的引用也是一个问题,编译器将重命名rawVocab和optionVocab,但返回的数据不会被重命名,因此您需要引用ne8il所指出的这些值。
var response;
var request = new goog.net.XhrIo();
goog.events.listen(request, "complete", function(){
if (request.isSuccess()) {
window['console'].log("Now the response returned, setting response variable");
response = request.getResponseText();
console.log("Satus code: ", request.getStatus(), " - ", request.getStatusText());
} else {
console.log(
"Something went wrong in the ajax call. Error code: ", request.getLastErrorCode(),
" - message: ", request.getLastError()
);
}
});
window['console'].log("Sending request");
request.send("load_vocab.php");
window['console'].log("Trying to read response");
var rawVocab = response['rawVocab'];
var optionVocab = response['optionVocab'];
上述代码的输出为:
Sending request
Trying to read response
Error
Now the response returned, setting response variable