Apps Script that counts the number of Heading 4 elements in a Google Doc

Apps Script Code

function countHeading4InDocument() {
  const DOCID = 'YOUR_DOCUMENT_ID_HERE'; // Replace with your Document ID
  const doc = DocumentApp.openById(DOCID);
  const body = doc.getBody();
  const paragraphs = body.getParagraphs();

  let heading4Count = 0;

  // Iterate through all paragraphs
  for (let i = 0; i < paragraphs.length; i++) {
    const paragraph = paragraphs[i];
    if (paragraph.getHeading() === DocumentApp.ParagraphHeading.HEADING4) {
      heading4Count++; // Increment counter if it's a Heading 4
    }
  }

  Logger.log(`Number of Heading 4 elements: ${heading4Count}`);
  return heading4Count; // Optional, in case you want to use it in another script
}

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How It Works

1. Access the Document:
   • The script opens the document using DocumentApp.openById(DOCID).
2. Iterate Through Paragraphs:
   • The script loops through all paragraphs in the document using getParagraphs().
3. Check for Heading 4:
   • For each paragraph, it checks if the heading style is HEADING4 using paragraph.getHeading().
4. Count Heading 4:
   • A counter variable (heading4Count) is incremented for each paragraph identified as Heading 4.
5. Log the Result:
   • The total count is logged in the Logs (View > Logs) for verification.

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Steps to Use

1. Set Up Apps Script:
   • Open Google Drive, go to Extensions > Apps Script, and paste the code into the script editor.
2. Replace the Document ID:
   • Replace 'YOUR_DOCUMENT_ID_HERE' with the ID of your Google Doc.
3. Run the Script:
   • Click the Run button in the Apps Script editor. Authorize the script if prompted.
4. Check the Logs:
   • Open View > Logs to see the total number of Heading 4 elements.

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Example

Document Content:

Heading 4: Section 1
Heading 2: Introduction
Heading 4: Section 2

Log Output:

Number of Heading 4 elements: 2

This script provides an efficient way to count Heading 4 elements, helping you analyze and manage your document’s structure.