Rules / title rules

title.content.undefined

Default
error
Plugin
title

The title does not include the word undefined.

Why: undefined in a title is almost always a template bug, such as a missing variable.

When off: titles with undefined pass.

<!-- ✗ Fails -->
<title>undefined | Bongo Bakery</title>

<!-- ✓ Passes -->
<title>About | Bongo Bakery</title>

References