title: Run Google Apps Script on Google-Spreadsheet event?
body: <p>If I create a Google apps script, can I hook it up to Google spreadsheet to run based on an event, or must I manually invoke it?</p>
  
  <p>I don't know if Google Sheets supports any events.</p>
  
  <p>For example: a Google app script that strikes out rows in the spreadsheet that have been marked completed by way of a column having the digit 1 beside completed rows. I would like this to run whenever a row is modified, or even when the spreadsheet is first loaded.</p>