title: Filereader - upload same file again not working
body: <p>I have sth like drawing app. User can save projects and then load them. When I load first time one file (for e.g. project1.leds) make some changes in the app but no saving it and then again load same file (project1.leds) nothing happen. I cant load same file more than once. If I load another file, it's working.</p>
  
  <p>Code:</p>
  
  <pre><code>$("#menu-open-file").change(function(e){
      var data=[];
  
      var file = null;
      file = e.target.files[0];
      console.log(file)
      var reader = new FileReader();
          reader.onload = function(e){
              data=JSON.parse(reader.result);
              x=data[0].SIZE[0];
              y=data[0].SIZE[1];
              if(x==15) x=16;
              if(x==30) x=32;
              if(x==60) x=64;
              if(y==15) y=16;
              if(y==30) y=32;
              if(y==60) y=64;
              createLeds(x,y,data,false,false);
              clearActiveTools();
              var svg = $('#contener').find('svg')[0];
                  svg.setAttribute('viewBox','0 0 ' + x*20 + ' ' + y*20);
              $("#contener").css("width",x*20).css("height",y*20);
              $("#contener").resizable({
                  aspectRatio: x/y,
                  minHeight: 200,
                  minWidth: 200,
              });
              wiFirst = $("#contener").width();
              hiFirst = $("#contener").height();
          }
          reader.readAsText(file);
  });
  </code></pre>
  
  <p>Can i delete/remove cached file? Is it even cached in browser?</p>