onEdit(e) trigger does nothing when cell is being edited - google-apps-script

Question

I am trying to change the text in a cell (different from the edited one) when a specific cell is being edited
I am using the following code:
function get_cells(){
if (sheet.getRange(3,6).getValue() == 'Cat') {
sheet.getRange(5,5).setValue('Animal')
} else if (sheet.getRange(3,6).getValue() == 'Apple') {
sheet.getRange(5,5).setValue('Fruit')
} else {
sheet.getRange(5,5).setValue(NaN)
}
}
function onEdit(e){
var range = e.range;
if (range.getRow()== 3 && range.getColumn()==6){
get_cells();
}
}
The idea is that when the cell (3,6) is edited then the content of the cell (5,5) will be changed automatically. But it doesn't work

Answer 1

Try it this way:
Get cells required the sheet. You could have learned this by viewing you executions.
function get_cells(sheet) {
if (sheet.getRange(3, 6).getValue() == 'Cat') {
sheet.getRange(5, 5).setValue('Animal')
} else if (sheet.getRange(3, 6).getValue() == 'Apple') {
sheet.getRange(5, 5).setValue('Fruit')
} else {
sheet.getRange(5, 5).setValue(NaN)
}
}
function onEdit(e) {
e.source.toast('entry');
const sheet = e.range.getSheet();
if (e.range.rowStart == 3 && e.range.columnStart == 6) {
e.source.toast('first if')
get_cells(sheet);
}
}
Incomplete list of event object values