Check if node in tree is already selected

It took me a long time to figure out how to check if a node in a dijit.tree is already set to selected, when the user clicks on it. So I thought I share what I found out:

dojo.connect(this.tree, 'onMouseDown', this, function(evt) {
  var node = dijit.getEnclosingWidget(;
  if (node.item == this.tree.attr('selectedItem')) {

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