Moving from a media for

Define Semantically

I want to know which form of the following structures is the one that's semantically correct, if I want to use an achor that triggers a javascript callback but doesn't make the window navigate to another place:

The javascript:

window.addEventListener('load', function { document.getElementById('AuxAnchor').addEventListener('click', function(e) { // Do something e.preventDefault; // Don't navigate to anywhere }, false) }, false);

The HTML:

Defined href attribute with blank value:

Defined href attribute with missing in-document ID:

Undefined href attribute:

Note that in the latter (undefined href attribute) I have to simulate an hyperlink appearance by using styles, but that's basically just a cosmetic issue, and it doesn't bother me at all to do so.

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