no-is-prefix-prop

Part of: componentApi preset (opt-in — not in recommended)

Boolean props default to false and their name should describe the true state directly. The is prefix is redundant noise: looped reads naturally, isLooped does not. This follows the same convention flagged by MUI's component API guidelines.

Why This Matters

Issue	Impact	Solution
Redundant prefix	`isOpen`, `isDisabled` are wordier than necessary	Rename to `open`, `disabled`
Inconsistency	HTML uses `disabled`, `checked`, `open` — no `is` prefix	Match the platform convention

Examples

Incorrect

interface ButtonProps {
  isDisabled: boolean;  // ❌ R8 — rename to `disabled`
  isLoading: boolean;   // ❌ R8 — rename to `loading`
}

Correct

interface ButtonProps {
  disabled?: boolean;
  loading?: boolean;
}

Suggestions

This rule provides a rename suggestion (not an auto-fix) because renaming the prop has consumer-side blast radius — call sites must be updated manually.

Configuration

// eslint.config.mjs
export default [
  {
    rules: {
      "react-features/no-is-prefix-prop": "error",
    },
  },
];

This rule is part of eslint-plugin-react-features.