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deprecated-element Rule Changes

This page covers a scope change in the deprecated-element rule. If you relied on this rule to detect non-standard elements, read on.

Summary​

ChangeWho is affected
Non-standard element detection moved to no-unsupported-featuresConfigs using deprecated-element to catch non-standard elements

What changed​

In v4, deprecated-element detected three categories:

  • Deprecated elements
  • Obsolete elements
  • Non-standard elements

In v5, non-standard element detection has been moved to the new no-unsupported-features rule. deprecated-element now only detects deprecated and obsolete elements.

Before (v4)​

deprecated-element automatically flagged non-standard elements like <bgsound>:

<!-- Reported by deprecated-element in v4 -->
<bgsound src="music.mid"></bgsound>

After (v5)​

deprecated-element no longer reports non-standard elements.

How to fix​

Enable no-unsupported-features with the checkNonStandard option:

{
  "rules": {
    "no-unsupported-features": {
      "options": {
        "checkNonStandard": true
      }
    }
  }
}
tip

If you use the recommended preset, no-unsupported-features is already enabled via the compat preset. No action is needed.