Get JSON.stringify error message

Question

I'm getting an error when trying to call an REST service using ajax. I'm trying to track down the error. The xhr.message is always coming in as undefined. Is there a better way to get the exact message as to why it is erroring?

$.ajax({
    url: 'myurl.com/post/',
    type: 'post',
    data: query,
    cache: false,
    error: function (xhr, status, error) {
        alert(JSON.stringify(xhr.message));
        alert(JSON.stringify(status));
        alert(JSON.stringify(error));
    }
});

But why exactly should it be defined? Neither native XMLHttpRequest nor its superset provided by jQuery doesn't mention any `message` property. — raina77ow, Dec 18 '13 at 22:36

brandonscript · Accepted Answer · 2013-12-18T22:40:14.127

First, you should be using the newer (non-deprecated) format to make ajax calls

Deprecation Notice: The jqXHR.success(), jqXHR.error(), and jqXHR.complete() callbacks are deprecated as of jQuery 1.8. To prepare your code for their eventual removal, use jqXHR.done(), jqXHR.fail(), and jqXHR.always() instead.

Here's an example:

$.ajax({
    url: 'myurl.com/post/',
    type: 'post',
    data: query,
    cache: false
})
.done(function(data) {
    alert(JSON.stringify(data));
})
.fail(function (xhr, status, error) {
    alert(JSON.stringify(xhr.message));
    alert(JSON.stringify(status));
    alert(JSON.stringify(error));
});

Second, message isn't a property (I don't think?) of the $.ajax call; it's statusthat you want, and it's just a text string. Try console.log(status), and same for xhr and error instead, and inspect the console to see what's being returned and what you want to retrieve.

Get JSON.stringify error message

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