|
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| -<p> |
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| - <img width="100%" src="https://assets.solidjs.com/banner?type=ESLint%20Plugin&background=tiles&project=%20" alt="Solid ESLint Extension"> |
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| -</p> |
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| - |
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| -# Solid ESLint Plugin |
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| - |
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| -[](https://npmjs.com/package/eslint-plugin-solid) |
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| -[](https://github.com/solidjs-community/eslint-plugin-solid) |
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| - |
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| -[](https://github.com/solidjs-community/eslint-plugin-solid/actions/workflows/ci.yml) |
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| - |
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| -This package contains [Solid](https://www.solidjs.com/)-specific linting rules for ESLint. It can |
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| -ease Solid's learning curve by finding and fixing problems around Solid's reactivity system, and can |
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| -migrate some React patterns to Solid code. |
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| - |
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| -It's approaching a `1.0.0` release, and it's well tested and should be helpful in Solid projects |
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| -today. |
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| - |
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| -<!-- AUTO-GENERATED-CONTENT:START (TOC) --> |
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| -- [Installation](#installation) |
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| -- [Configuration](#configuration) |
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| - - [TypeScript](#typescript) |
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| - - [Manual Configuration](#manual-configuration) |
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| - - [Flat Configuration](#flat-configuration) |
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| -- [Rules](#rules) |
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| -- [Troubleshooting](#troubleshooting) |
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| -- [Versioning](#versioning) |
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| -<!-- AUTO-GENERATED-CONTENT:END --> |
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| - |
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| -## Installation |
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| - |
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| -Install `eslint` and `eslint-plugin-solid` locally. |
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| - |
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| -```sh |
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| -npm install --save-dev eslint eslint-plugin-solid |
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| -# or |
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| -pnpm add --save-dev eslint eslint-plugin-solid |
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| -yarn add --dev eslint eslint-plugin-solid |
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| - |
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| -# optional, to create an ESLint config file |
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| -npx eslint --init |
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| -# or |
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| -pnpm eslint --init |
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| -yarn eslint --init |
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| -``` |
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| - |
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| -If you're using VSCode, you'll want to install the [ESLint |
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| -extension](https://marketplace.visualstudio.com/items?itemName=dbaeumer.vscode-eslint). You're |
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| -encouraged to enable auto-fixing problems on save by adding the following to your `settings.json` |
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| -file. |
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| - |
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| -```json |
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| -{ |
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| - "editor.codeActionsOnSave": { |
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| - "source.fixAll": true |
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| - } |
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| -} |
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| -``` |
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| - |
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| -If you're using Vite, you may want to install |
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| -[vite-plugin-eslint](https://github.com/gxmari007/vite-plugin-eslint). |
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| - |
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| -You may also want to check out |
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| -[eslint-plugin-jsx-a11y](https://github.com/jsx-eslint/eslint-plugin-jsx-a11y), which provides |
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| -useful rules for writing accessible HTML. |
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| - |
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| -## Configuration |
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| - |
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| -Use the `"plugin:solid/recommended"` configuration to get reasonable defaults as shown [below](#rules). |
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| - |
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| -```json |
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| -{ |
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| - "plugins": ["solid"], |
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| - "extends": ["eslint:recommended", "plugin:solid/recommended"] |
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| -} |
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| -``` |
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| - |
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| -### TypeScript |
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| - |
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| -If you're using TypeScript, use the `"plugin:solid/typescript"` configuration instead. |
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| -This disables some features that overlap with type checking. |
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| - |
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| -```json |
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| -{ |
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| - "parser": "@typescript-eslint/parser", |
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| - "plugins": ["solid"], |
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| - "extends": ["eslint:recommended", "plugin:solid/typescript"] |
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| -} |
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| -``` |
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| - |
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| -### Manual Configuration |
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| - |
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| -If you don't want to use a preset, you can configure rules individually. Add the `"solid"` plugin, |
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| -enable JSX with the parser options (or use the equivalent options for `@typescript-eslint/parser` or |
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| -`@babel/eslint-parser`), and configure the rules you would like to use. Some rules have additional |
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| -options you can set. |
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| - |
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| -```json |
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| -{ |
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| - "plugins": ["solid"], |
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| - "parserOptions": { |
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| - "ecmaFeatures": { |
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| - "jsx": true |
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| - } |
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| - }, |
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| - "rules": { |
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| - "solid/reactivity": "warn", |
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| - "solid/no-destructure": "warn", |
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| - "solid/jsx-no-undef": "error" |
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| - } |
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| -} |
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| -``` |
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| - |
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| -### Flat Configuration |
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| - |
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| -ESLint's new configuration system, [Flat |
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| -Configuration](https://eslint.org/docs/latest/use/configure/configuration-files-new#using-configurations-included-in-plugins), |
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| -is available starting in ESLint [v8.23.0](https://github.com/eslint/eslint/releases/tag/v8.23.0). To |
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| -use it, create an `eslint.config.js` file at the root of your project, instead of `.eslintrc.*` |
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| -and/or `.eslintignore`. |
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| - |
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| -```js |
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| -import js from "@eslint/js"; |
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| -import solid from "eslint-plugin-solid/configs/recommended"; |
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| - |
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| -export default [ |
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| - js.configs.recommended, // replaces eslint:recommended |
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| - solid, |
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| -]; |
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| -``` |
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| - |
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| -For TypeScript: |
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| - |
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| -```js |
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| -import js from "@eslint/js"; |
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| -import solid from "eslint-plugin-solid/configs/typescript"; |
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| -import * as tsParser from "@typescript-eslint/parser"; |
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| - |
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| -export default [ |
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| - js.configs.recommended, |
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| - { |
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| - files: ["**/*.{ts,tsx}"], |
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| - ...solid, |
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| - languageOptions: { |
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| - parser: tsParser, |
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| - parserOptions: { |
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| - project: "tsconfig.json", |
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| - }, |
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| - }, |
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| - }, |
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| -]; |
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| -``` |
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| - |
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| -These configurations do not configure global variables in ESLint. You can do this yourself manually |
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| -or with a package like [globals](https://www.npmjs.com/package/globals) by creating a configuration |
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| -with a `languageOptions.globals` object. We recommend setting up global variables for Browser APIs |
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| -as well as at least ES2015. |
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| - |
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| -Note for the ESLint VSCode Extension: Enable the "Use Flat Config" setting for your workspace to |
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| -enable Flat Config support. |
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| - |
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| -Flat configs are also available as `plugin.configs['flat/recommended']` and `plugin.configs['flat/typescript']`, after using `import plugin from 'eslint-plugin-solid'`. |
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| - |
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| -## Rules |
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| - |
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| -✔: Enabled in the `recommended` configuration. |
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| - |
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| -🔧: Fixable with [`eslint --fix`](https://eslint.org/docs/user-guide/command-line-interface#fixing-problems)/IDE auto-fix. |
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| - |
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| -<!-- AUTO-GENERATED-CONTENT:START (RULES) --> |
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| -| ✔ | 🔧 | Rule | Description | |
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| -| :---: | :---: | :--- | :--- | |
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| -| ✔ | 🔧 | [solid/components-return-once](docs/components-return-once.md) | Disallow early returns in components. Solid components only run once, and so conditionals should be inside JSX. | |
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| -| ✔ | 🔧 | [solid/event-handlers](docs/event-handlers.md) | Enforce naming DOM element event handlers consistently and prevent Solid's analysis from misunderstanding whether a prop should be an event handler. | |
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| -| ✔ | 🔧 | [solid/imports](docs/imports.md) | Enforce consistent imports from "solid-js", "solid-js/web", and "solid-js/store". | |
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| -| ✔ | | [solid/jsx-no-duplicate-props](docs/jsx-no-duplicate-props.md) | Disallow passing the same prop twice in JSX. | |
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| -| ✔ | | [solid/jsx-no-script-url](docs/jsx-no-script-url.md) | Disallow javascript: URLs. | |
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| -| ✔ | 🔧 | [solid/jsx-no-undef](docs/jsx-no-undef.md) | Disallow references to undefined variables in JSX. Handles custom directives. | |
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| -| ✔ | | [solid/jsx-uses-vars](docs/jsx-uses-vars.md) | Prevent variables used in JSX from being marked as unused. | |
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| -| | | [solid/no-array-handlers](docs/no-array-handlers.md) | Disallow usage of type-unsafe event handlers. | |
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| -| ✔ | 🔧 | [solid/no-destructure](docs/no-destructure.md) | Disallow destructuring props. In Solid, props must be used with property accesses (`props.foo`) to preserve reactivity. This rule only tracks destructuring in the parameter list. | |
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| -| ✔ | 🔧 | [solid/no-innerhtml](docs/no-innerhtml.md) | Disallow usage of the innerHTML attribute, which can often lead to security vulnerabilities. | |
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| -| | | [solid/no-proxy-apis](docs/no-proxy-apis.md) | Disallow usage of APIs that use ES6 Proxies, only to target environments that don't support them. | |
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| -| ✔ | 🔧 | [solid/no-react-deps](docs/no-react-deps.md) | Disallow usage of dependency arrays in `createEffect` and `createMemo`. | |
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| -| ✔ | 🔧 | [solid/no-react-specific-props](docs/no-react-specific-props.md) | Disallow usage of React-specific `className`/`htmlFor` props, which were deprecated in v1.4.0. | |
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| -| ✔ | | [solid/no-unknown-namespaces](docs/no-unknown-namespaces.md) | Enforce using only Solid-specific namespaced attribute names (i.e. `'on:'` in `<div on:click={...} />`). | |
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| -| | 🔧 | [solid/prefer-classlist](docs/prefer-classlist.md) | Enforce using the classlist prop over importing a classnames helper. The classlist prop accepts an object `{ [class: string]: boolean }` just like classnames. | |
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| -| ✔ | 🔧 | [solid/prefer-for](docs/prefer-for.md) | Enforce using Solid's `<For />` component for mapping an array to JSX elements. | |
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| -| | 🔧 | [solid/prefer-show](docs/prefer-show.md) | Enforce using Solid's `<Show />` component for conditionally showing content. Solid's compiler covers this case, so it's a stylistic rule only. | |
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| -| ✔ | | [solid/reactivity](docs/reactivity.md) | Enforce that reactivity (props, signals, memos, etc.) is properly used, so changes in those values will be tracked and update the view as expected. | |
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| -| ✔ | 🔧 | [solid/self-closing-comp](docs/self-closing-comp.md) | Disallow extra closing tags for components without children. | |
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| -| ✔ | 🔧 | [solid/style-prop](docs/style-prop.md) | Require CSS properties in the `style` prop to be valid and kebab-cased (ex. 'font-size'), not camel-cased (ex. 'fontSize') like in React, and that property values with dimensions are strings, not numbers with implicit 'px' units. | |
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| -<!-- AUTO-GENERATED-CONTENT:END --> |
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| - |
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| -## Troubleshooting |
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| - |
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| -The rules in this plugin provide sensible guidelines as well as possible, but there may be times |
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| -where you know better than the rule and want to ignore a warning. To do that, [add a |
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| -comment](https://eslint.org/docs/latest/user-guide/configuring/rules#disabling-rules) like the |
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| -following: |
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| - |
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| -```jsx |
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| -// eslint-disable-next-line solid/reactivity |
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| -const [editedValue, setEditedValue] = createSignal(props.value); |
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| -``` |
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| - |
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| -_Please note_: there may also be times where a rule correctly warns about a subtle problem, |
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| -even if it looks like a false positive at first. With `solid/reactivity`, please look at the |
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| -[reactivity docs](./docs/reactivity.md#troubleshooting) before deciding to disable the rule. |
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| - |
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| -When in doubt, feel free to [file an |
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| -issue](https://github.com/solidjs-community/eslint-plugin-solid/issues/new/choose). |
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| - |
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| -## Versioning |
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| - |
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| -Pre-1.0.0, the rules and the `recommended` and `typescript` configuations will be |
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| -stable across patch (`0.0.x`) versions, but may change across minor (`0.x`) versions. |
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| -If you want to pin a minor version, use a tilde in your `package.json`. |
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| - |
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| -<!-- AUTO-GENERATED-CONTENT:START (TILDE) --> |
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| -```diff |
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| -- "eslint-plugin-solid": "^0.14.1" |
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| -+ "eslint-plugin-solid": "~0.14.1" |
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| -``` |
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| -<!-- AUTO-GENERATED-CONTENT:END --> |
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