Obtenha a posição do cursor na Div Contentável
function cursor_position() {
var sel = document.getSelection();
var pos = sel.toString().length;
if(sel.anchorNode != undefined) sel.collapseToEnd();
return pos;
}
// Demo:
var elm = document.querySelector('[contenteditable]');
elm.addEventListener('click', printCaretPosition)
elm.addEventListener('keydown', printCaretPosition)
function printCaretPosition(){
console.log( cursor_position(), 'length:', this.textContent.trim().length )
}
Blue-eyed Bison