Google Spreadsheet onEdit - limit to a range - google-apps-script

Question

I would like to fire a trigger with onEdit if a event (edit a cell) happens in a specific range of a Sheet (NOT all Sheet)?
Exemple: I only want to trigger if a cell of the range called "trgRng" (C10:C250) of Sheet_1 is edited.
I coded as below, but it trigger all sheets not only a specific range of a specific sheet
function onEdit(e) {
var ss = SpreadsheetApp.getActiveSpreadsheet();
// source sheet
var sSh = ss.getSheetByName("Diario");
var aCell = sSh.getActiveCell().getValue();
// destiny sheet - set value from source sheet
var dSh = ss.getSheetByName("Auxiliar");
dSh.getRange('L4').setValue(aCell);
}
Is it possible? How?

Answer 1

I already solve it:
{
function onEdit(e) {
var ss = SpreadsheetApp.getActiveSpreadsheet();
// source sheet
var sSh = e.source.getActiveSheet();
var maxRow = sSh.getMaxRows();
var name = sSh.getName();
var rng = e.range;
var rngCol = rng.getColumn();
if (sSh.getName() == "Diário" && rng.getColumn() == 8) {
ss.getSheetByName("Diário");
var aCell = sSh.getActiveCell().getValue();
// target sheet
var shD = ss.getSheetByName("Auxiliar");
shD.getRange('L4').setValue(aCell);
}
}
}