JS : Get clipboard data on Click (not on Paste)

Question

How can I get the clipboard data on click on a button.. not on pasting into textarea.

Something like this :

<button onclick="seeClipBoard">Click to see your clipboard data</button>

<div id="seeData"></div>

var seeClipBoard = function() {
    var data = ****************** ;
    $("#seeData").html(data);
};

I d'ont want to use the paste event, but a click

Thank you!