Why don't my onEdit script keep runing?

Question

I'm new to coding and google app scripts. I write a onEdit script, and when I run it, it shows me. "Start running", and 1 second later "Finished". It doesn't show me any error. How do I make it keep running? This is my script:

function onEdit() {
  var s = SpreadsheetApp.getActiveSpreadsheet();
  var r = s.getActiveCell();
  if (s.getName="Reading Log" && r.getColumn() !=2) {
    r.offset(0,-1).setValue(new Date()).setNumberFormat("MM/dd/yy")
  }
}

What I want to do is that I have a google sheet reading log. On sheet 'Reading Log' column 2, I'm going to put the name of book or article I read. I want the script automatically fill in the date I enter the name into column 1 next to it. I'll be happy if someone could help me fix it or write a better script. Thank you!

Answer 1

The onEdit(e) function is a simple trigger. Do not run the code in the script editor. It runs automatically when you manually edit the spreadsheet.

To insert a timestamp when column B is edited, fix line 4 like this:

  if (s.getName() === 'Reading Log' && r.getColumn() === 2) {

For better performance, use the event object. See onEdit(e) best practices.