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PDF form import and export events in JavaScript

12 Feb 20262 minutes to read

Import/export events let users track and customize the lifecycle of form data imported into or exported from the PDF Viewer.
Use these events to:

validate inputs before processing
show progress indicators
log audit trails
block operations based on business rules

Each event provides detailed context through typed event arguments such as ImportStartEventArgs, ImportSuccessEventArgs, ImportFailureEventArgs, ExportStartEventArgs, ExportSuccessEventArgs, and ExportFailureEventArgs.

Import events

importStart — Fires when an import begins.
importSuccess — Fires when form fields are successfully imported.
importFailed — Fires if the import fails.

Example: Handle import events

// ...viewer initialization...
viewer.importStart = function (args) {
  console.log('Import started', args);
  // e.g. show spinner, validate inputs
};
viewer.importSuccess = function (args) {
  console.log('Import success', args);
  // e.g. hide spinner, show toast
};
viewer.importFailed = function (args) {
  console.error('Import failed', args);
  // e.g. show error dialog
};

Export events

exportStart — Fires when an export begins.
exportSuccess — Fires when form fields are successfully exported.
exportFailed — Fires if the export fails.

Example: Handle export events

// ...viewer initialization...
viewer.exportStart = function (args) {
  console.log('Export started', args);
  // e.g. disable export UI
};
viewer.exportSuccess = function (args) {
  console.log('Export success', args);
  // e.g. enable UI, provide download link
};
viewer.exportFailed = function (args) {
  console.error('Export failed', args);
  // e.g. re-enable UI, notify user
};

Key notes

importStart, importSuccess, importFailed cover the full import lifecycle.
exportStart, exportSuccess, exportFailed cover the full export lifecycle.

See also