base-before-urls

Require <base href> to appear before elements with URL attributes in <head>.

Severity

warning

❌ Incorrect

<head>
  <link rel="stylesheet" href="s.css">
  <base href="/">
  <title>T</title>
</head>

✅ Correct

<head>
  <base href="/">
  <link rel="stylesheet" href="s.css">
  <title>T</title>
</head>

Reference

• HTML Standard - The base element

Configuration

{
  "rules": {
    "base-before-urls": "warning"
  }
}