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Resolving AjaxSubmit and jQuery UI Datepicker Conflicts

If a datepicker stops working after Ajax validation, the problem is usually a lost JavaScript initialization step after the form is re-rendered.

This scenario came from a booking popup where AjaxSubmit handled validation errors correctly, but the jQuery UI datepicker stopped working afterward. That usually means the DOM was updated and the widget was never re-initialized.

Why It Breaks

  • AjaxSubmit replaces or mutates the form markup after validation.
  • The datepicker was initialized only on first page load.
  • After the failed submit, the new inputs exist, but they are no longer bound to the widget.

Reliable Fix Direction

  • Re-run datepicker initialization after AjaxSubmit replaces the form markup.
  • Keep the datepicker setup inside a reusable function rather than inline startup code.
  • Test both first open and validation-error scenarios, not just the happy path.

The broader lesson is useful across many Evo projects: any Ajax form that re-renders markup must also rebind its JavaScript widgets after the update.

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