Selection.type

The type read-only property of the Selection interface returns a DOMString describing the type of the current selection.

A DOMString describing the type of the current selection. Possible values are:

• None: No selection has currently been made.
• Caret: The selection is collapsed (i.e. the caret is placed on some text, but no range has been selected).
• Range: A range has been selected.

In this example, the event handler will fire each time a new selection is made. console.log(selection.type) will return Caret or Range depending on whether the caret is placed at a single point in the text, or a range has been selected.

var selection;

document.onselectionchange = function() {
  console.log('New selection made');
  selection = document.getSelection();
  console.log(selection.type);
};

• Selection