Note: Deactivating link navigation

Method 1: 

<a href="#" id="link" onclick="return false">Disabled Link</a>

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Method 2 (IE9+):

<a href="#" id="link" style="pointer-events:none">Disabled Link </a>

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Method 3 - explicit

<a href="#" id="link">Disabled Link</a>

<script>
  document.querySelector("#link").addEventListener("click", function(event){
            event.preventDefault();
        }, false);
</script