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ESLint and most of the used plugins already released new major versions. Trying to use later versions of these plugins as well as ESLint itself caused error when using npm v7 because peer dependencies are installed automatically [1] now, which is a fantastic change, but also broke and blocked the usage of the configuration packages due to outdated `peerDependencies` like `eslint@^6`. >> Core The latest version 7 comes with great features and improvements. See the official v7 migration guide [2] for all details. - Update ESLint package version - updated from `v6.2.0` to `v7.23.0` [3]. - Allow to define additional file extensions in configuration packages - files matched by `overrides[].files` are now linted by default [4] which allows to add extensions like `*.ts` and `*.tsx` to `@arcticicestudio/eslint-config-typescript` without the need to specify this override over and over again in each project. - Remove deprecated rules** - some rules have been deprecated [5] and have been removed in favor of the support for `eslint-plugin-node` like documented in GH-30. - `callback-return` [6] → `node/callback-return` [7] - `global-require` [8] → `node/global-require` [9] - `handle-callback-err` [10] → `node/handle-callback-err` [11] - `no-mixed-requires` [12] → `node/no-mixed-requires` [13] - `no-new-require` [14] → `node/no-new-require` [15] - `no-path-concat` [16] → `node/no-path-concat` [17] - `no-process-env` [18] → `node/no-process-env` [19] - `no-process-exit` [20] → `node/no-process-exit` [21] - `no-restricted-modules` [22] → `node/no-restricted-modules` [23] - `no-sync` [24] → `node/no-sync` [25] - Adapt new recommended rules - some rules have been added and enabled on the `eslint:recommended` rule set [26] and have been added to `@arcticicestudio/eslint-config-base` with `error` level: - `no-dupe-else-if` [27] - `no-import-assign` [28] - `no-setter-return` [29] >> Plugins & Dependencies >>> `@arcticicestudio/eslint-config` - eslint-config-prettier [30] - Bumped version from `v6.0.0` to `v8.1.0` [31]. As of version `8.0.0` all rule sets have been merged into the main `prettier` set [32]. Therefore the additional `prettier/react` set has been removed from the `extends` array of the Prettier specific rules. - eslint-find-rules [33] - Bumped version from `v3.4.0` to `v3.6.1` [34]. - eslint-plugin-import [35] - Bumped minimum version from `v2.18.2` to `v2.22.1` [36]. - eslint-plugin-jsx-a11y [37] - Bumped minimum version from `v6.2.3` to `v6.4.1` [38]. - eslint-plugin-prettier [39] - Bumped minimum version from `v3.1.0` to `v3.3.1` [40]. - eslint-plugin-react [41] - Bumped minimum version from `v7.14.3` to `v7.23.1` [42]. This includes new rules and improvements to existing ones: - Added new `react/jsx-no-useless-fragment` [43] rule with `error` level (introduced in `v7.15.0` [44]) that disallows unnecessary fragments. - Added the new `static-variables` option to the `react/sort-comp` [45] rule (introduced in `v7.15.0` [44]). - Added new `react/jsx-newline` [46] rule (introduced in `v7.22.0` [47]) and disabled by default. - Added new `react/jsx-no-constructed-context-values` [48] rule (introduced in `v7.22.0` [47]) and enabled by default to prevent React contexts from taking non-stable values. "React Context, and all its child nodes and Consumers are rerendered whenever the value prop changes. Because each Javascript object carries its own identity, things like object expressions (`{foo: "bar"}`) or function expressions get a new identity on every run through the component. This makes the context think it has gotten a new object and can cause needless rerenders and unintended consequences. This can be a pretty large performance hit because not only will it cause the context providers and consumers to rerender with all the elements in its subtree, the processing for the tree scan React does to render the provider and find consumers is also wasted." - Added `enforceDynamicLinks` option with value `always` for `react/jsx-no-target-blank` [49] rule (introduced in `v7.9.0` [50]) - Added `react/no-unstable-nested-components` [51] rule and enabled by default to prevent creating unstable components inside components. "Creating components inside components without memoization leads to unstable components. The nested component and all its children are recreated during each re-render. Given stateful children of the nested component will lose their state on each re-render. React reconcilation performs element type comparison with reference equality [52]. The reference to the same element changes on each re-render when defining components inside the render block. This leads to complete recreation of the current node and all its children. As a result the virtual DOM has to do extra unnecessary work and possible bugs are introduced. - Added `forbidDefaultForRequired` option with value `true` for `react/require-default-props` [53] rule (introduced in `v7.5.0` [54]) - eslint-plugin-react-hooks [55] - Bump minimum version from `v2.0.0` to `v4.2.0` [56]. >>> `@arcticicestudio/eslint-config-base` - confusing-browser-globals [57] - Bumped minimum version from `v1.0.8` to `v1.0.10`. - eslint-find-rules [33] - Bumped version from `v3.4.0` to `v3.6.1` [34]. - eslint-plugin-import [35] - Bumped minimum version from `v2.18.2` to `v2.22.1` [36]. >>> `@arcticicestudio/eslint-config-typescript` - @typescript-eslint/eslint-plugin [58] - Bumped minimum version from `v2.0.0` to `v4.20.0` [59]. - @typescript-eslint/parser [60] - Bumped minimum version from `v2.0.0` to `v4.20.0` [59]. - typescript [61] - Bumped minimum version from `v3.5.3` to `v4.2.3` [62]. [1]: https://github.blog/2020-10-13-presenting-v7-0-0-of-the-npm-cli/#user-content-breaking-changes [2]: https://eslint.org/docs/user-guide/migrating-to-7.0.0 [3]: eslint/eslint@v6.2.0....v7.23.0 [4]: https://eslint.org/docs/user-guide/migrating-to-7.0.0#lint-files-matched-by-overridesfiles-by-default [5]: https://eslint.org/docs/user-guide/migrating-to-7.0.0#nodejscommonjs-rules-have-been-deprecated [6]: https://eslint.org/docs/rules/callback-return [7]: https://github.com/mysticatea/eslint-plugin-node/blob/master/docs/rules/callback-return.md [8]: https://eslint.org/docs/rules/global-require [9]: https://github.com/mysticatea/eslint-plugin-node/blob/master/docs/rules/global-require.md [10]: https://eslint.org/docs/rules/handle-callback-err [11]: https://github.com/mysticatea/eslint-plugin-node/blob/master/docs/rules/handle-callback-err.md [12]: https://eslint.org/docs/rules/no-mixed-requires [13]: https://github.com/mysticatea/eslint-plugin-node/blob/master/docs/rules/no-mixed-requires.md [14]: https://eslint.org/docs/rules/no-new-require [15]: https://github.com/mysticatea/eslint-plugin-node/blob/master/docs/rules/no-new-require.md [16]: https://eslint.org/docs/rules/no-path-concat [17]: https://github.com/mysticatea/eslint-plugin-node/blob/master/docs/rules/no-path-concat.md [18]: https://eslint.org/docs/rules/no-process-env [19]: https://github.com/mysticatea/eslint-plugin-node/blob/master/docs/rules/no-process-env.md [20]: https://eslint.org/docs/rules/no-process-exit [21]: https://github.com/mysticatea/eslint-plugin-node/blob/master/docs/rules/no-process-exit.md [22]: https://eslint.org/docs/rules/no-restricted-modules [23]: https://github.com/mysticatea/eslint-plugin-node/blob/master/docs/rules/no-restricted-modules.md [24]: https://eslint.org/docs/rules/no-sync [25]: https://github.com/mysticatea/eslint-plugin-node/blob/master/docs/rules/no-sync.md [26]: https://eslint.org/docs/user-guide/migrating-to-7.0.0#eslintrecommended-has-been-updated [27]: https://eslint.org/docs/rules/no-dupe-else-if [28]: https://eslint.org/docs/rules/no-import-assign [29]: https://eslint.org/docs/rules/no-setter-return [30]: https://github.com/prettier/eslint-config-prettier [31]: prettier/eslint-config-prettier@v6.0.0...v8.1.0 [32]: https://github.com/prettier/eslint-config-prettier/blob/main/CHANGELOG.md#version-800-2021-02-21 [33]: https://github.com/sarbbottam/eslint-find-rules [34]: sarbbottam/eslint-find-rules@v3.4.0...v3.6.1 [35]: https://github.com/benmosher/eslint-plugin-import [35]: https://github.com/benmosher/eslint-plugin-import [36]: import-js/eslint-plugin-import@v2.18.2...v2.22.1 [37]: https://github.com/jsx-eslint/eslint-plugin-jsx-a11y [38]: jsx-eslint/eslint-plugin-jsx-a11y@v6.2.3...v6.4.1 [39]: https://github.com/prettier/eslint-plugin-prettier [40]: prettier/eslint-plugin-prettier@v3.1.0...v3.3.1 [41]: https://github.com/yannickcr/eslint-plugin-react [42]: jsx-eslint/eslint-plugin-react@v7.14....v7.23.1 [43]: https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-no-useless-fragment.md [44]: https://github.com/yannickcr/eslint-plugin-react/blob/master/CHANGELOG.md#7150---2019-09-30 [45]: https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/sort-comp.md [46]: https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-newline.md [47]: https://github.com/yannickcr/eslint-plugin-react/blob/master/CHANGELOG.md#7220---20201229 [48]: https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-no-constructed-context-values.md [49]: https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-no-target-blank.md [50]: https://github.com/yannickcr/eslint-plugin-react/blob/master/CHANGELOG.md#790---2018-06-03 [51]: https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-unstable-nested-components.md [52]: https://github.com/facebook/react/blob/v16.13.1/packages/react-reconciler/src/ReactChildFiber.js#L407 [53]: https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/require-default-props.md [54]: https://github.com/yannickcr/eslint-plugin-react/blob/master/CHANGELOG.md#750---2017-11-18 [55]: https://github.com/facebook/react/tree/master/packages/eslint-plugin-react-hooks [56]: https://github.com/facebook/react/blob/master/packages/eslint-plugin-react-hooks/CHANGELOG.md#420 [57]: https://github.com/facebook/create-react-app/tree/master/packages/confusing-browser-globals [58]: https://github.com/typescript-eslint/typescript-eslint/tree/master/packages/eslint-plugin [59]: typescript-eslint/typescript-eslint@v2.0.0...v4.20.0 [60]: https://github.com/typescript-eslint/typescript-eslint/tree/master/packages/parser [61]: https://github.com/microsoft/TypeScript [62]: microsoft/TypeScript@v3.5.3...v4.2.3 Co-authored-by: Sven Greb <[email protected]> GH-31
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