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Why JavaScript Date Fields Do Not Update in Acrobat Reader iOS
Question details
Users are unable to get JavaScript-calculated date fields to automatically update in PDF timesheets when using the mobile application.
- Product
- Adobe Acrobat Reader
- Device & OS
- iOS / iPhone
- Scenario
- Opening and attempting to fill out a PDF form or timesheet that relies on automated date fields on an iPhone.
- Observed behavior
- The automated date fields update correctly on the desktop version of Acrobat Reader but remain static and fail to trigger JavaScript calculations in the iOS app.
Verify that you are testing the exact same PDF file on both your desktop and mobile device to ensure the issue is related to the mobile environment and not a broken script in the file itself.
Acknowledge the iOS App Limitation and Submit Feedback
Adobe Acrobat Reader for iOS currently does not support JavaScript execution, meaning automated fields will not work natively until future updates.
Mobile PDF readers, including Acrobat Reader for iOS, often lack support for JavaScript due to operating system restrictions and app performance considerations.
Adobe has acknowledged that mobile JavaScript support is currently missing but is placed in their future enhancement pipeline.
Navigate to Adobe's official product feedback page using your web browser at https://www.adobe.com/products/wishform.html.
Choose 'Adobe Acrobat Reader for iOS' from the designated product dropdown menu.
Briefly explain that you need JavaScript support for automatic date field calculations on iPhone forms, then submit the form to alert the development team.
Replace JavaScript with Standard Form Fields
Since JavaScript is unsupported on mobile platforms, redesigning the PDF form to rely on manual text entry ensures compatibility across all iOS devices.
Edit and Manage PDFs Easily with WPS Office
While advanced JavaScript limitations affect many mobile PDF readers, WPS Office provides a highly compatible, fast, and free alternative for managing standard PDF forms, documents, and spreadsheets across all your devices.
Frequently Asked Questions
Does any PDF reader on iPhone fully support JavaScript?
Most mobile PDF readers, including the native iOS Preview and Adobe Acrobat Reader, do not support JavaScript due to stringent security protocols and resource constraints on mobile operating systems.
Why do my PDF forms calculate correctly on my PC but not my phone?
Desktop PDF applications contain built-in JavaScript engines capable of processing complex background calculations. Mobile apps are typically streamlined for basic reading and annotations, omitting these heavy processing engines.
How can I make my PDF timesheets mobile-friendly?
To ensure your timesheets function flawlessly on iPhones and iPads, avoid using custom JavaScript calculations. Instead, implement standard interactive text fields that allow users to manually type the date or required data.
