How to have only one box checked instead of two on Google Apps Script?

Question

function onEdit() {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = ss.getSheets()[1];
  if (sheet.getActiveCell() = \"E11\"){
    sheet.getRange(\'E12\'         


        

Answer 1

Here's an alternative implementation of @Anton's answer that uses the RangeList class to support arbitrarily oriented "radio button"-grouped checkboxes, provided they're all on the same worksheet (the RangeList range sources must be on the same worksheet).

function onEdit(e) {
  const sheetName = 'some sheet name',
      rbLocations = [
        {r: 1, c: 1}, // A1
        {r: 2, c: 4}, // D2
        {c: 1, r: 8}, // A8
        ...
      ];

  if (!e) return; // only run for sheet edits.

  const toggle = e.oldValue;
  if (toggle === undefined)
    return; // require edit to be of a single cell.

  const sheet = edited.getSheet();
  if (sheet.getName() !== sheetName)
    return; // require edit to be of the desired sheet.

  const edited = e.range,
      eRow = edited.getRow(),
      eCol = edited.getColumn(),
      otherRBs = rbLocations.filter(
        function (loc) {
          return loc.r !== eRow || loc.c !== eCol;
        }
      ).map(
        function (l) {
          // Create an R1C1 notation string.
          return "R" + l.r + "C" + l.c; 
        }
      );

  // Acquire and use a RangeList to set the same value to all the other checkboxes.
  sheet.getRangeList(otherRBs).setValue(toggle);
}

References

• Array#filter
• Array#map
• Sheet#getRangeList
• Event objects - edit