Jquery selectable only with shortcut

I want to let the user select when the shift key is held.

$("#div").selectable({
        start: function(st) {
            $(window).keydown(function(e){
                if(!e.shiftKey){
                    st.stopPropagation();
                }
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        });

no?

You can shorten down your code to be much simpler by using the .shiftKey property on the event directly (it's present in the mousedown event too), like this:

$("#div").mousedown(function(e){
   if(e.shiftKey) return;
   e.stopImmediatePropagation();
   return false;
}).selectable();

You can test it out here.

for those who need it or something similar, this worked well for me:

    var shift = false;

    $(window).keydown(function(e){
        if(e.shiftKey){
    shift = true;
        }
    })
    .keyup(function(e){
        if(!e.shiftKey){
            shift = false;
        }
    });

    $("#div")
    .mousedown(function(e){
       if(!shift){
         e.stopImmediatePropagation();
         return false;          
       }
    })
    .selectable();

$(window).keydown(function(e){
  if(!e.shiftKey){
     $("#div").selectable({
        start: function(st) {
        st.stopPropagation();
          //your code here
        });

     }
});

if that doesn't work try use document instead of window or 'body'