While many developers are familiar with Adobe Acrobat’s JavaScript implementation, Foxit Software has built a robust, high-performance alternative that offers unique advantages in speed, cross-platform support (Web, Desktop, Mobile, and Cloud), and licensing flexibility.
| Error Message | Cause | Solution | | :--- | :--- | :--- | | this.getField(...) is null | Field name misspelled or field doesn't exist. | Verify the name in the Fields pane. | | event.value is undefined | Using a calculation script on a field without a calculation event. | Only use event.value in Calculation, Validation, or Format events. | | Permission denied for doc.saveAs | Script is not trusted. | Digitally sign the PDF with a certificate or adjust Trust Manager settings. | | Out of memory | Infinite loop or massive recursion. | Check while loops and use event.rc carefully in validation. | foxit javascript api
Save the PDF. Share it. Anyone opening it in Foxit (or even Adobe Reader) will see the dynamic text. You’ve just written your first PDF application. While many developers are familiar with Adobe Acrobat’s
Let’s build a quick scenario. You are a hospital administrator. You have a 10-page intake form. Patient checks "No" for insurance. Currently, a human deletes pages 4-7 manually. | | event