Rule

// The aria-label value must contain the visible text as a case-insensitive substring.
// ✅ Correct — aria-label extends visible text with extra context
<button aria-label="Delete item 42">Delete</button>
// ✅ Correct — icon button with no visible text; aria-label is the only name
<button aria-label="Close dialog"><svg aria-hidden="true" .../></button>
// ❌ Incorrect — aria-label replaces "Submit" with something else entirely
<button aria-label="Proceed to next step">Submit</button>

Bad Patterns

// ❌ Visible "Save" replaced by unrelated accessible name — voice command "Save" fails
// <button aria-label="Persist changes to server">Save</button>

// ❌ Visible "Cancel" but aria-label says "Dismiss modal" — voice command "Cancel" fails
// <button aria-label="Dismiss modal">Cancel</button>

Severity

block

Verification

Check every element with aria-label that also has non-empty text content; confirm the aria-label value contains that text (case-insensitive). axe-core rule: label-content-name-mismatch.

Tools

• axe-core
• lighthouse

Rule

// The aria-label value must contain the visible text as a case-insensitive substring.
// ✅ Correct — aria-label extends visible text with extra context
<button aria-label="Delete item 42">Delete</button>
// ✅ Correct — icon button with no visible text; aria-label is the only name
<button aria-label="Close dialog"><svg aria-hidden="true" .../></button>
// ❌ Incorrect — aria-label replaces "Submit" with something else entirely
<button aria-label="Proceed to next step">Submit</button>

Bad Patterns

// ❌ Visible "Save" replaced by unrelated accessible name — voice command "Save" fails
// <button aria-label="Persist changes to server">Save</button>

// ❌ Visible "Cancel" but aria-label says "Dismiss modal" — voice command "Cancel" fails
// <button aria-label="Dismiss modal">Cancel</button>

Severity

block

Verification

Check every element with aria-label that also has non-empty text content; confirm the aria-label value contains that text (case-insensitive). axe-core rule: label-content-name-mismatch.

Tools

• axe-core
• lighthouse

Rationale

Voice-control software (Dragon NaturallySpeaking, macOS Voice Control, Windows Voice Access) activates controls by matching spoken words to the accessible name. If aria-label contradicts or omits the visible label, the spoken command fails silently — the user sees 'Submit' but must say the hidden aria-label value they cannot know.

Applies When

Adding aria-label or aria-labelledby to any interactive element (

Rule

// The aria-label value must contain the visible text as a case-insensitive substring.
// ✅ Correct — aria-label extends visible text with extra context
<button aria-label="Delete item 42">Delete</button>
// ✅ Correct — icon button with no visible text; aria-label is the only name
<button aria-label="Close dialog"><svg aria-hidden="true" .../></button>
// ❌ Incorrect — aria-label replaces "Submit" with something else entirely
<button aria-label="Proceed to next step">Submit</button>

Bad Patterns

// ❌ Visible "Save" replaced by unrelated accessible name — voice command "Save" fails
// <button aria-label="Persist changes to server">Save</button>

// ❌ Visible "Cancel" but aria-label says "Dismiss modal" — voice command "Cancel" fails
// <button aria-label="Dismiss modal">Cancel</button>

Severity

block

Verification

Check every element with aria-label that also has non-empty text content; confirm the aria-label value contains that text (case-insensitive). axe-core rule: label-content-name-mismatch.

Tools

• axe-core
• lighthouse