Clear contents of rows with date older than today with a button - google-apps-script

Question

I'm trying to put on some Google Function to make that in the title. I'm very beginner but I'm up for the challenge. I managed to make a button that clears the whole range (C5:G102).
But I want now a code that clears that range only for the dates that are older than today.
I have columns with subject, a deadline, description, etc. The whole date goes from column C to G. So when I click the button I want all subjects in that row that already has an older deadline than today, to be cleared out. The dates are in the column D.
Can that be done?
I have only this:
function clearRange() {
//replace 'Sheet1' with your actual sheet name
var sheet = SpreadsheetApp.getActive().getSheetByName('ADD');
sheet.getRange('C5:G102').clearContent();
}
So, after some trying I came up with this: but it doesn't work...
function ClearOlder() {
var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName('ADD');
var lastRow = sheet.getLastRow();
var columnD = sheet.getRange(2, 4, sheet.getLastRow(), 1).getValues();
var day = 24*3600*1000
var today = parseInt((new Date().setHours(0,0,0,0))/day);
for (var i=1; i < columnD.length; i++) {
var dataday = parseInt(new Date(columnD[i][4]).getTime()/day);
if (dataday < today) {sheet.getRange(i+1, 4, lastRow, 1).clearContent();}
}
}

Answer 1

You can actually compare date directly in javascript. You do not need the parseInt() function.
var TEN_DAYS = 10 * 24 * 60 * 60 * 1000;
// days hrs min sec ms
var expiry = new Date() - TEN_DAYS;
var date1 = new Date('2019-02-5');
var date2 = new Date('2019-02-1');
var date3 = new Date('2019-01-25');
console.log(expiry > date1); //Less than 10 days ago
console.log(expiry > date2); //Less than 10 days ago
console.log(expiry > date3); //More than 10 days ago
Updated: Your columnD selector was off.
function clearOlder() {
//consider camelCase --> clearOlder()
var sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet();
var lastRow = sheet.getLastRow();
var columnD = sheet.getRange(2, 4, sheet.getLastRow(), 1).getValues(); //OP updated this to better fit their specific spreadsheet.
var one_day = 24*3600*1000;
var expiry = new Date() - one_day;
for (var i=1; i < columnD.length; i++) {
var dataday = new Date(columnD[i][0]);
if (expiry > dataday) {
sheet.getRange(i+1, 1, 1, 4).clearContent(); //OP updated this to better fit their specific spreadsheet.
}
}
}

Answer 2

Yes! I got it!!!
function clearOlder() {
//consider camelCase --> clearOlder()
var sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet();
var lastRow = sheet.getLastRow();
var columnD = sheet.getRange(1, 4, sheet.getLastRow(), 5).getValues();
var one_day = 24*3600*1000;
var expiry = new Date() - one_day;
for (var i=1; i < columnD.length; i++) {
var dataday = new Date(columnD[i][0]);
if (expiry > dataday) {
sheet.getRange(i+1, 1, 1, 5).clearContent();
}
}
}