heading-levels

Detect skipped heading levels.

Severity

error

❌ Incorrect

<h1>Title</h1>
<h3>Sub</h3>

✅ Correct

<h1>Title</h1>
<h2>Sub</h2>
<h3>SubSub</h3>

Reference

• HTML Standard - Headings and outlines

Configuration

{
  "rules": {
    "heading-levels": "error"
  }
}