what is the purpose of index param inside getRangeAt() function ?
As I can see - only one single selection is possible
Is there any scenario with multiple selections and having the index param usefull ?
$('button').on('click', function(){
var sel = document.getSelection();
var a = sel.getRangeAt(0).toString();
console.log(a);
});<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div>lorem ipsum</div>
<div>dolor sit</div>
<div>amet</div>
<button>CLICK</button>According to the documentation for rangeCount
A user can normally only select one range at a time, so the rangeCount will usually be 1. Scripting can be used to make the selection contain more than one range.
Gecko browsers allow multiple selections across table cells. Firefox allows to select multiple ranges in the document by using Ctrl+click (unless the click occurs within an element that has the display: table-cell CSS property assigned).