Google Sheets Delete Cell with specific background color

Question

I am trying to get this function to work in Apps Script but for the life of me I cant seem to find the problem.

I have a range of cells highlighted in one column in my sheet. I want to delete all the contents from those cells - not the rows.

Here is what I have so far:

function clearGreen() {

  var ss    = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = ss.getSheets()[0];
  var range = sheet.getDataRange();
  var bgColors = range.getBackgrounds();
  for (var i=0; i<bgColors.length; i++) {
    for (var j=0; j<bgColors[i].length; j++) {
      if (bgColors[i][j] === '#D9E9D3') {
        range.getCell(i+1,j+1).clearContent();
      }
    }
  }  
}

The error it is returning when trying to debug is as follows:

TypeError: Cannot read property 'getSheets' of null
clearGreen  @ Code.gs:4

UPDATE: The below solution worked perfectly and much faster than my code. NOTE your worksheet needs to be the FIRST worksheet in your workbook, mine was sheet 59 so once I moved it to the first position it executed perfectly.

THANK YOU!

Answer 1

Try to change the line:

if (bgColors[i][j] === '#D9E9D3') {

with:

if (bgColors[i][j].toUpperCase() === '#D9E9D3') {

And it will work much faster this way:

function clearGreen() {
  var ss    = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = ss.getSheets()[0];
  var range = sheet.getDataRange();
  var bgColors = range.getBackgrounds();
  var data = range.getValues()      // <--- get all the data as an array
  for (var i=0; i<bgColors.length; i++) {
    for (var j=0; j<bgColors[i].length; j++) {
      if (bgColors[i][j].toUpperCase() === '#D9E9D3') {
        data[i][j] = '';            // <--- change the array
      }
    }
  }
  range.setValues(data);            // <--- put the array back on the sheet
}