How to get all checked cells from checkboxes in google apps script? - google-apps-script

Question

I have a goolesheets that contains checkboxes. I would like to get all checked cells using google apps script. For example, as below picture, I would like to get a result of 'A3', 'A6' and 'A9'.
I tried many different ways and I found a script below but it only gives me the last cell, which is 'A9'.
Any ideas or suggestions would be much appreciated.
var range = '';
var sel = SpreadsheetApp.getActive().getSelection().getActiveRangeList().getRanges();
for(var i = 0; i < sel.length; i++){
range += sel[i].getA1Notation() + ', ';
}
Logger.log(range);

Answer 1

Explanation:
Your current solution uses getSelection which means if you select the desired cells manually:
you will get A3, A9, A6, which based on your code is the correct answer. Although, I guess you don't want to manually select them, otherwise it wouldn't make sense to use a script to find them.
Side Note:
If you want to use that solution, I assume you want A3, A9, A6 instead of A3, A9, A6, so this would make more sense:
function myFunction() {
const sel = SpreadsheetApp.getActive().getSelection().getActiveRangeList().getRanges();
const range = [];
for(var i = 0; i < sel.length; i++){
range.push(sel[i].getA1Notation());
}
Logger.log(range.join(', '));
}
assuming again you have selected the checkboxes as in the screenshot.
Solution:
In the below solution, adjust Sheet1 to the name of your sheet.
function myFunction() {
const ss = SpreadsheetApp.getActive();
const sh = ss.getSheetByName('Sheet1'); // put the name of your sheet here
const colA = sh.getRange('A1:A'+sh.getLastRow()).getValues().flat();
const range=colA.map((c,i)=>c==true?`A${i+1}`:'').filter(c=>c!='').join(', ');
Logger.log(range); // A3, A6, A9
}
In this solution, we are getting all the values of column A, then using map we get the cell reference of the true cells (checkbox is clicked) and then filtering on these values.

Answer 2

I tried replicating your scenario and did some changes in your code specifically in the declaration of the sheet and data range to be checked. For the solution, I changed your loop and added a condition inside to check for true(ticked checkbox) values.
Please see my code below. This is working fine on my end. Note that this is assuming that you only have your checkboxes on column A.
function myFunction() {
var range = '';
var ss = SpreadsheetApp.getActive();
var sheet = ss.getSheetByName('Sheet1');
var val = sheet.getRange(1,1,sheet.getLastRow(), 1).getValues();
for(row in val){
if(val[row][0]==true){
range += 'A'+ (parseInt(row) + 1) + ',';
}
}
Logger.log(range);
}