Google Apps Script Auto Number Headings

Modified version of this script that adds a Headings tools Document menu allowing you to:

• auto number Heading
• clear Headings numbers

How to auto number Google Documents Headings:

1. Open your document > Tools > Script editor...
2. Start a blank project
3. Paste the code from the code.gs file and save with your preffered name
4. Select Run > onOpen and authorize the script for the first time
5. Select Run > onOpen
6. Change to your Document and try the functions on the Headings tools custom menu created.

Disclaimer: you may have issues with empty Headings.. But you can always fix them and run action again.