成功将记录添加到数据库 (ajax) 时，Javascript 会自动发出警报

Question

I'm building out a simple chat app and every time I hit the send button (which adds a record to the database) I get an alert saying "Success". Nowhere in my code do I tell it to give me a success alert, only an error alert. Here is the code that gets called when the send button is clicked

function formCheck(e){
e.preventDefault();
// ensure message has text
if(msg.value.trim() != ""){
    $.ajax({
        type: 'POST',
        url: '../handle_message.php',
        data: {
            name: name,
            color: color,
            msg: $( "#msg" ).val(),
        },
        datatype: 'JSON',
        success: function(bool){
            if (bool == "failure") {
                alert("Failure Inside Success function");
            }
        },
        error: function(){
            alert("Failure, could not send message");
        },
    });
}
}

The php:

require_once("Database.php");
$dbc = $conn->getConnection();

$sql = "INSERT INTO Table (name, color, msg) VALUES (:name, :color, :msg)";
$statement = $dbc->prepare($sql);
$statement->bindValue(":name", $_POST['name']);
$statement->bindValue(":color", $_POST['color']);
$statement->bindValue(":msg", $_POST['msg']);
$result = $statement->execute();

if(!$result){
    echo "failure";
}

The php works how it's supposed to. I'm just not sure why I'm getting the success popup after clicking the button. Any help would be appreciated.

Update: I was only testing this in Google Chrome. Once I switched over to Firefox the alert went away, I guess it was something with chrome?

Going back to the Google Chrome tab, holding the shift key and pressing refresh did the trick! thanks to all that took the time to comment

Answer 1

Shift Reload

Holding the shift key down when requesting a refresh tells the browser to reload everything from the server without using cached copies. When viewing pages which use the file:// protocol it should ensure page files are reloaded from local storage rather than (say) history snapshots, but if problems persist close and re-open the browser.

I probably learned of this in Netscape documentation last century - where it's documented now would require time and a more intensive search than the one I tried.

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FWIW Technical details about headers sent to the server are covered in this answer on Super User.