Auto Send Email When Checkbox is Checked - Google Sheet - google-apps-script

Question

I tried the script from Auto Email Function for Google Sheets Mobile and it worked the first time. When I tried to change the variables, it does not automatically send the email, unless I run the script again, it would then update the response sheet and then clears the checkbox. Please help me with this. Kindly see my code below.
function EmailNotification(e) {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheet = ss.getSheetByName('Course_AutoEmail'); //source sheet
var columnb = sheet.getRange('I:I'); //Column with check boxes
var columnbvalue = columnb.getValues();
var notifysheet = ss.getSheetByName('Responses'); //destination sheet
var data = [];
var rownum = [];
//Condition check in B:B (or check box column); If true copy the same row to data array
for (let i = 0; i < columnbvalue.length; i++) {
if (columnbvalue[i][0] === true) {
var columnb2 = sheet.getRange('I747:I'); //row started in row 747
columnb2.setValue('false');
data.push.apply(data, sheet.getRange(i + 1, 1, 1, 20).getValues());
//Copy matched ROW numbers to rownum
rownum.push(i);
//Copy data array to destination sheet
notifysheet.getRange(notifysheet.getLastRow() + 1, 1, data.length, data[0].length).setValues(data);
var activeRow = notifysheet.getLastRow();
var name = notifysheet.getRange(activeRow, 1).getDisplayValue(); // The number is the column number in the destination "responses" sheet that you want to include in the email
var employeeID = notifysheet.getRange(activeRow, 2).getDisplayValue();
var position = notifysheet.getRange(activeRow, 3).getDisplayValue();
var team = notifysheet.getRange(activeRow, 4).getDisplayValue();
var date = notifysheet.getRange(activeRow, 10).getDisplayValue();
var rec1 = notifysheet.getRange(activeRow, 19).getDisplayValue();
var rec2 = notifysheet.getRange(activeRow, 20).getDisplayValue();
var email = rec1 + "," + rec2;
var subject = name + ': 201 Completion';
//Body of the email message, using HTML and the variables from above
var message =
'<br><div style="margin-left:10px;">Hi, </div>' +
'<br><div style="margin-left:10px;">Good day!</div>' +
'<br><div style="margin-left:10px;"><b>' + name + '</b> has completed the course. </div>' +
'<br><div style="margin-left:20px;"><h3 style="text-decoration: underline; color: #f36f21">Employee Details: </h3></div>' +
'<div style="margin-left:25px;">Name: <b>' +
name +
'</b></div>' +
'<div style="margin-left:25px;">Position: <b>' +
position +
'</b></div>' +
'<div style="margin-left:25px;">Team: <b>' +
team +
'</b></div>' +
'<div style="margin-left:25px;">Completion Date: <b>' +
date +
'</b></div>' +
'<br><br><div style="margin-left:10px;">Let me know if you have any questions. </div>' +
'<br><div style="margin-left:10px;">Thanks! </div>';
MailApp.sendEmail(email, subject, '', {
htmlBody: message,
name: 'Updates',
});
}
}
}

Answer 1

I read your code.
if you don't want your checked checkbox unchecked in spreadsheet.
so you have to remove `columnb2.setValue('false');` line of code.
this line is made checkbox unchecked.
solution of other problems : http://one7techlab.com