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May 29th, 2015
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  1. <pre></pre>
  2. <script>
  3. var pre = document.getElementsByTagName('pre')[0];
  4.  
  5. document.onbeforepaste = document.onbeforecopy = document.onbeforecut = function (e) {
  6. pre.appendChild(document.createTextNode(e.type));
  7. }
  8.  
  9. for(var cmd in {'copy':1, 'cut':1, 'paste':1}){
  10. pre.appendChild(document.createTextNode('\n\n' + cmd.toUpperCase() + '\n'));
  11. pre.appendChild(document.createTextNode('queryCommandSupported(): ' + document.queryCommandSupported(cmd) + '\n'));
  12. try{
  13. pre.appendChild(document.createTextNode('queryCommandEnabled(): ' + document.queryCommandEnabled(cmd) + '\n'));
  14. }catch(e){
  15. pre.appendChild(document.createTextNode('queryCommandEnabled throws: '+e))
  16. }
  17.  
  18. }
  19. </script>
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