[Fix] fix unstable plugin reference with flat configs #1038
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The previous use of spread meant that ```ts import jsxA11y from 'eslint-plugin-jsx-a11y'; jsxA11y !== jsxA11y.flatConfigs.recommended.plugins['jsx-a11y'] ``` This is a problem because if someone does something like this ```js import jsxA11y from 'eslint-plugin-jsx-a11y'; export default [ { plugins: { 'jsx-a11y': jsxA11y } }, jsxA11y.flatConfigs.recommended, ]; ``` then ESLint will crash with the error `Config "jsx-a11y/recommended": Key "plugins": Cannot redefine plugin "jsx-a11y".` This PR fixes that by using `Object.assign` to mutate the `jsxA11y` object and maintain referential equality. 
Member
| Can we add a test that covers this? |
ljharb approved these changes Nov 17, 2024
| hey @ljharb @bradzacher this was merged but never released? cant find it in published versions thanks |
Member
| yes, that's correct, it hasn't been released yet |
may it be released? or is waiting on something else? I'd be really nice to release it (nextjs has also moved to flat config with latest release) |
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The previous use of spread meant that
This is a problem because if someone does something like this
then ESLint will crash with the error
Config "jsx-a11y/recommended": Key "plugins": Cannot redefine plugin "jsx-a11y".This PR fixes that by using
Object.assignto mutate thejsxA11yobject and maintain referential equality.