What version of Oxlint are you using?

1.67.0

What command did you run?

oxlint ./App.jsx

What does your .oxlintrc.json (or oxlint.config.ts) config file look like?

{
  "plugins": ["jsx-a11y"],
  "rules": {
    "jsx-a11y/no-redundant-roles": "error"
  }
}

What happened?

jsx-a11y/no-redundant-roles reports two false positives where the role is not actually redundant. eslint-plugin-jsx-a11y does not.

1. <input role="combobox"> (no list attribute): flagged as having implicit role combobox.
2. <header role="banner">: flagged as having implicit role banner.

With --fix these role attributes are automatically removed, breaking queries in integration tests due to changed roles.

Minimal reproduction

Create a folder with these three files and run:

npx oxlint@1.67.0 ./App.jsx

{
  "name": "repro",
  "private": true,
  "scripts": { "lint": "oxlint ./App.jsx" },
  "devDependencies": { "oxlint": "1.67.0" }
}

{
  "plugins": ["jsx-a11y"],
  "rules": { "jsx-a11y/no-redundant-roles": "error" },
}

export function InputCombobox() {
  return (
    <input
      role='combobox'
      aria-label='Search'
      aria-expanded={false}
      aria-controls='listbox-id'
      aria-autocomplete='list'
      aria-haspopup='listbox'
    />
  )
}

export function HeaderBanner() {
  return (
    <header role='banner' aria-label='Editor topbar'>
      Topbar
    </header>
  )
}

❯ npx oxlint@1.67.0 ./App.jsx

  × jsx-a11y(no-redundant-roles): The `input` element has an implicit role of `combobox`. Defining this explicitly is redundant and should be avoided.
   ╭─[App.jsx:4:7]
 3 │     <input
 4 │       role='combobox'
   ·       ───────────────
 5 │       aria-label='Search'
   ╰────
  help: Remove the redundant role `combobox` from the element `input`.

  × jsx-a11y(no-redundant-roles): The `header` element has an implicit role of `banner`. Defining this explicitly is redundant and should be avoided.
    ╭─[App.jsx:16:13]
 15 │   return (
 16 │     <header role='banner' aria-label='Editor topbar'>
    ·             ─────────────
 17 │       Topbar
    ╰────
  help: Remove the redundant role `banner` from the element `header`.

Found 0 warnings and 2 errors.
Finished in 16ms on 1 file with 92 rules using 16 threads.

Why false positives

<input>

• A plain <input> has implicit role textbox (par. 3.5.76).
• The implicit role is only combobox when the input has a list attribute pointing at a <datalist> (par. 3.5.77).

The rule currently treats combobox as redundant at all times. eslint-plugin-jsx-a11y returns textbox for this case and never combobox.

This also makes the standard ARIA 1.2 combobox pattern un-lintable, because removing the role then triggers role-supports-aria-props for all the combobox ARIA attributes due to a missing role="combobox".

<header>

ARIA in HTML:

header

If not a descendant of an article, aside, main, nav or section element, or an element with role=article, complementary, main, navigation or region then role=banner

Otherwise, role=generic

This condition is ancestor-dependent and can't be determined from a single JSXOpeningElement.

eslint-plugin-jsx-a11y omits header and similar elements, likely for this reason.

Suggested fixes

• <input>: only return combobox when a list attribute is set, otherwise return textbox.
• <header> (and <footer>, <main>, <address>): remove from the check since they're ancestor dependent.