Diagnosing Pug Template Inheritance Failures: A Structured Guide

Pug Inheritance Not Rendering: Check Path and Syntax

If your Pug templates are not inheriting correctly—meaning child templates do not receive the layout structure defined in the parent—the issue is usually related to file paths, incorrect directive usage, or compilation context, not a core Pug limitation.

Inheritance Diagnostic Checklist

Step-by-Step Verification

1. Verify File Structure: Ensure the child template correctly references the parent layout using a relative path (e.g., extends: ../layouts/main.pug).
2. Check Directive Syntax: The child template must start with the extends directive, followed by the parent file path.
3. Test Inheritance: Create a minimal example:
   • layout.pug: doctype html html head title= title body block content
   • page.pug: extends layout.pug block content h1 Hello World
4. Compile and Inspect: Use the Pug compiler utility on page.pug. Inspect the resulting HTML to confirm the h1 Hello World is nested within the body defined in layout.pug.

Fixing Common Path Errors

When using file inclusion or inheritance, Pug resolves paths relative to the file containing the directive. If page.pug is in /views/pages/ and layout.pug is in /views/layouts/, the correct path in page.pug is extends ../layouts/layout.pug. Incorrectly using absolute paths or failing to account for directory depth is the most common error.

Escalation Criteria

If paths are verified and the syntax matches the standard extends directive, the next step is to confirm the compiler version being used, as minor syntax variations can exist between major Pug releases. Ensure the compiler supports standard template inheritance behavior.