1. /**
  2. * Schedules a one-off script execution for given dates.
  3. * Supports older browsers (IE11+).
  4. *
  5. * @param {Array<Date>} dates An array of Date objects representing the execution times.
  6. * @param {Function} script The function to execute.
  7. * @param {boolean} [immediate=false] Whether to execute the script immediately.
  8. */
  9. function scheduleOneOffScript(dates, script, immediate = false) {
  10. if (!Array.isArray(dates)) {
  11. console.error("Dates must be an array.");
  12. return;
  13. }
  15. if (typeof script !== 'function') {
  16. console.error("Script must be a function.");
  17. return;
  18. }
  20. for (let i = 0; i < dates.length; i++) {
  21. const date = dates[i];
  23. if (!(date instanceof Date) || isNaN(date)) {
  24. console.error(`Invalid date at index ${i}: ${date}`);
  25. continue; // Skip to the next date
  26. }
  28. const delay = immediate ? 0 : date.getTime() - Date.now(); // Calculate delay
  30. if (delay <= 0) {
  31. // Execute immediately if the date is in the past
  32. script();
  33. continue;
  34. }
  36. // Use setTimeout for scheduling - works in older browsers
  37. setTimeout(() => {
  38. script();
  39. }, delay);
  40. }
  41. }

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