Automatically Export Google Doc as PDF on File Change
Automatically exporting on file change means a fresh PDF is generated every time the document is updated. This is useful for documents that are actively maintained and where stakeholders need the latest version as a PDF without requesting it manually.
Drive onChange trigger
Apps Script provides an onChange trigger at the Drive level. When any file in your Drive is modified, the trigger fires. In the trigger function, filter for the specific file you want to monitor by checking the event's file ID. If the changed file matches, run the export.
Limitations of event-based triggers
Drive event triggers are not real-time. They fire within a few minutes of a change, not instantaneously. For documents that are updated frequently, consider debouncing the export to avoid generating many PDFs in quick succession.
Version control with change-triggered exports
When exporting on every change, use timestamped filenames to keep a history. Each export reflects the state of the document at that point. This creates an automatic audit trail for documents that are modified over time.
Frequently Asked Questions
Can I automatically export a Google Doc as PDF every time it is saved?
Yes, using an Apps Script onChange trigger. The export runs within a few minutes of each save.
Will the export trigger for every small edit?
The Drive onChange trigger fires on any modification, including minor edits. For documents that are edited frequently, this could generate many PDFs. Consider a time-based trigger instead if a daily snapshot is sufficient.
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