How to remove the Uncaught ReferenceError error?

Question

JavaScript

I understand the technology of transferring data to analytics, I sketched out the code, but it gives an error:
I duplicate all messages from the console here, the error is in the third message

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Conflict when accessing the jQuery Mask Input Plugin: undefined typeof $.mask

Uncaught ReferenceError : onAjaxSuccess is not defined at HTMLAnchorElement.

- points to the first onAjaxSuccess in the code.

<a id='buttonId'>отправить данные в аналитику</a>
<script>
$('#buttonId').click(function(){
        $.post(
                "http://www.google-analytics.com/collect",
                {
                        v: '1',
                        tid: 'UA-xxxxxx-1',
                        cid: 'a7a364d8-0d14-4e77-b637-xxxxxxxxxx',
                        t: 'transaction',
                        ti: '21001',
                        ta: 'online покупка',
                        tr: '1000.00'
                },
                onAjaxSuccess
        )
$.post(
                "http://www.google-analytics.com/collect",
                {
                        v: '1',
                        tid: 'UA-xxxxxx-1',
                        cid: 'a7a364d8-0d14-4e77-b637-xxxxxxxxxx',
                        t: 'item',
                        ti: '21001',
                        in: 'товар1',
                        ip: '700.00',
                        iv: 'категория1'
                },
                onAjaxSuccess
        )
        $.post(
                "http://www.google-analytics.com/collect",
                {
                        v: '1',
                        tid: 'UA-xxxxxx-1',
                        cid: 'a7a364d8-0d14-4e77-b637-xxxxxxxxxx',
                        t: 'item',
                        ti: '21001',
                        in: 'товар2',
                        ip: '300.00',
                        iv: 'категория2'
                },
                onAjaxSuccess
        )
});
</script>

Answer 1

You are using an undefined identifier onAjaxSucces in your code and you are getting the corresponding error.
You must define the onAjaxSucces function in the code above.

function onAjaxSucces(data) {
  // do something with data
} 

$.post(
  "http://www.google-analytics.com/collect",
  {
    v: '1',
    tid: 'UA-xxxxxx-1',
    cid: 'a7a364d8-0d14-4e77-b637-xxxxxxxxxx',
    t: 'item',
    ti: '21001',
    in: 'товар2',
    ip: '300.00',
    iv: 'категория2'
  },
  onAjaxSucces
);

, or define an anonymous function in the arguments:

$.post(
  "http://www.google-analytics.com/collect",
  {
    v: '1',
    tid: 'UA-xxxxxx-1',
    cid: 'a7a364d8-0d14-4e77-b637-xxxxxxxxxx',
    t: 'item',
    ti: '21001',
    in: 'товар2',
    ip: '300.00',
    iv: 'категория2'
  },
  function(data) {
    // do something with data
  }
);

The second option is preferable if the function is not reused.
$.post can also take an object with parameters as an argument .