Ajax GET url on error jqxhr

Adding to @KhawerZeshan answer. It's better to set beforeAjax globally:

$.ajaxSetup({
    beforeSend: function(jqXHR, settings) {
        jqXHR.url = settings.url;
    }
});

This way if you use it with async await:

try {
   await $.get('http://example.com');
} catch(e) {
   console.log(e.url);
}

Save your url in a variable. And you can use it in the error function. Obviously the url will be same as it was supplied in the url parameter of the ajax request

var url = 'somewhere/foo';

$.ajax({
    type: 'get',
    url: url,
    context: this,
    success: this.mySuccess,
    error: this.myError,
    cache: false,
    error: function(jqXHR, exception) {
       //use url variable here   
    }
});

Another option can be this

$.ajax({
    type: 'get',
    url: 'https://google.com',
    context: this,
    success: this.mySuccess,
    error: this.myError,
    cache: false,
    beforeSend: function(jqXHR, settings) {
        jqXHR.url = settings.url;
    },
    error: function(jqXHR, exception) {
        alert(jqXHR.url);
    }
});

FIDDLE

I believe the simplest way would be:

this.url

The this should be bounded to the ajax settings object that has the url attribute.