How to find index of selected text in getSelection() using javascript?
window.getSelection().anchorOffset will give you the index that you are looking for.
MDN link: https://developer.mozilla.org/en-US/docs/Web/API/Selection/anchorOffset
What you are looking for is available inside object returned by window.getSelection()
document.getElementById('ip').addEventListener('mouseup',function(e)
{
var txt = this.innerText;
var selection = window.getSelection();
var start = selection.anchorOffset;
var end = selection.focusOffset;
if (start >= 0 && end >= 0){
console.log("start: " + start);
console.log("end: " + end);
}
});<div id="ip">YOLO Cobe</div>And here is example for more complex selections on page based on @Kaiido comment:
document.addEventListener('mouseup',function(e)
{
var txt = this.innerText;
var selection = window.getSelection();
var start = selection.anchorOffset;
var end = selection.focusOffset;
console.log('start at postion', start, 'in node', selection.anchorNode.wholeText)
console.log('stop at position', end, 'in node', selection.focusNode.wholeText)
});<div><span>Fragment1</span> fragment2 <span>fragment3</span></div>