|
1 | | -<p> |
2 | | - <img width="100%" src="https://assets.solidjs.com/banner?type=ESLint%20Plugin&background=tiles&project=%20" alt="Solid ESLint Extension"> |
3 | | -</p> |
4 | | - |
5 | | -# Solid ESLint Plugin |
6 | | - |
7 | | -[](https://npmjs.com/package/eslint-plugin-solid) |
8 | | -[](https://github.com/solidjs-community/eslint-plugin-solid) |
9 | | - |
10 | | -[](https://github.com/solidjs-community/eslint-plugin-solid/actions/workflows/ci.yml) |
11 | | - |
12 | | -This package contains [Solid](https://www.solidjs.com/)-specific linting rules for ESLint. It can |
13 | | -ease Solid's learning curve by finding and fixing problems around Solid's reactivity system, and can |
14 | | -migrate some React patterns to Solid code. |
15 | | - |
16 | | -It's approaching a `1.0.0` release, and it's well tested and should be helpful in Solid projects |
17 | | -today. |
18 | | - |
19 | | -<!-- AUTO-GENERATED-CONTENT:START (TOC) --> |
20 | | -- [Installation](#installation) |
21 | | -- [Configuration](#configuration) |
22 | | - - [TypeScript](#typescript) |
23 | | - - [Manual Configuration](#manual-configuration) |
24 | | - - [Flat Configuration](#flat-configuration) |
25 | | -- [Rules](#rules) |
26 | | -- [Troubleshooting](#troubleshooting) |
27 | | -- [Versioning](#versioning) |
28 | | -<!-- AUTO-GENERATED-CONTENT:END --> |
29 | | - |
30 | | -## Installation |
31 | | - |
32 | | -Install `eslint` and `eslint-plugin-solid` locally. |
33 | | - |
34 | | -```sh |
35 | | -npm install --save-dev eslint eslint-plugin-solid |
36 | | -# or |
37 | | -pnpm add --save-dev eslint eslint-plugin-solid |
38 | | -yarn add --dev eslint eslint-plugin-solid |
39 | | - |
40 | | -# optional, to create an ESLint config file |
41 | | -npx eslint --init |
42 | | -# or |
43 | | -pnpm eslint --init |
44 | | -yarn eslint --init |
45 | | -``` |
46 | | - |
47 | | -If you're using VSCode, you'll want to install the [ESLint |
48 | | -extension](https://marketplace.visualstudio.com/items?itemName=dbaeumer.vscode-eslint). You're |
49 | | -encouraged to enable auto-fixing problems on save by adding the following to your `settings.json` |
50 | | -file. |
51 | | - |
52 | | -```json |
53 | | -{ |
54 | | - "editor.codeActionsOnSave": { |
55 | | - "source.fixAll": true |
56 | | - } |
57 | | -} |
58 | | -``` |
59 | | - |
60 | | -If you're using Vite, you may want to install |
61 | | -[vite-plugin-eslint](https://github.com/gxmari007/vite-plugin-eslint). |
62 | | - |
63 | | -You may also want to check out |
64 | | -[eslint-plugin-jsx-a11y](https://github.com/jsx-eslint/eslint-plugin-jsx-a11y), which provides |
65 | | -useful rules for writing accessible HTML. |
66 | | - |
67 | | -## Configuration |
68 | | - |
69 | | -Use the `"plugin:solid/recommended"` configuration to get reasonable defaults as shown [below](#rules). |
70 | | - |
71 | | -```json |
72 | | -{ |
73 | | - "plugins": ["solid"], |
74 | | - "extends": ["eslint:recommended", "plugin:solid/recommended"] |
75 | | -} |
76 | | -``` |
77 | | - |
78 | | -### TypeScript |
79 | | - |
80 | | -If you're using TypeScript, use the `"plugin:solid/typescript"` configuration instead. |
81 | | -This disables some features that overlap with type checking. |
82 | | - |
83 | | -```json |
84 | | -{ |
85 | | - "parser": "@typescript-eslint/parser", |
86 | | - "plugins": ["solid"], |
87 | | - "extends": ["eslint:recommended", "plugin:solid/typescript"] |
88 | | -} |
89 | | -``` |
90 | | - |
91 | | -### Manual Configuration |
92 | | - |
93 | | -If you don't want to use a preset, you can configure rules individually. Add the `"solid"` plugin, |
94 | | -enable JSX with the parser options (or use the equivalent options for `@typescript-eslint/parser` or |
95 | | -`@babel/eslint-parser`), and configure the rules you would like to use. Some rules have additional |
96 | | -options you can set. |
97 | | - |
98 | | -```json |
99 | | -{ |
100 | | - "plugins": ["solid"], |
101 | | - "parserOptions": { |
102 | | - "ecmaFeatures": { |
103 | | - "jsx": true |
104 | | - } |
105 | | - }, |
106 | | - "rules": { |
107 | | - "solid/reactivity": "warn", |
108 | | - "solid/no-destructure": "warn", |
109 | | - "solid/jsx-no-undef": "error" |
110 | | - } |
111 | | -} |
112 | | -``` |
113 | | - |
114 | | -### Flat Configuration |
115 | | - |
116 | | -ESLint's new configuration system, [Flat |
117 | | -Configuration](https://eslint.org/docs/latest/use/configure/configuration-files-new#using-configurations-included-in-plugins), |
118 | | -is available starting in ESLint [v8.23.0](https://github.com/eslint/eslint/releases/tag/v8.23.0). To |
119 | | -use it, create an `eslint.config.js` file at the root of your project, instead of `.eslintrc.*` |
120 | | -and/or `.eslintignore`. |
121 | | - |
122 | | -```js |
123 | | -import js from "@eslint/js"; |
124 | | -import solid from "eslint-plugin-solid/configs/recommended"; |
125 | | - |
126 | | -export default [ |
127 | | - js.configs.recommended, // replaces eslint:recommended |
128 | | - solid, |
129 | | -]; |
130 | | -``` |
131 | | - |
132 | | -For TypeScript: |
133 | | - |
134 | | -```js |
135 | | -import js from "@eslint/js"; |
136 | | -import solid from "eslint-plugin-solid/configs/typescript"; |
137 | | -import * as tsParser from "@typescript-eslint/parser"; |
138 | | - |
139 | | -export default [ |
140 | | - js.configs.recommended, |
141 | | - { |
142 | | - files: ["**/*.{ts,tsx}"], |
143 | | - ...solid, |
144 | | - languageOptions: { |
145 | | - parser: tsParser, |
146 | | - parserOptions: { |
147 | | - project: "tsconfig.json", |
148 | | - }, |
149 | | - }, |
150 | | - }, |
151 | | -]; |
152 | | -``` |
153 | | - |
154 | | -These configurations do not configure global variables in ESLint. You can do this yourself manually |
155 | | -or with a package like [globals](https://www.npmjs.com/package/globals) by creating a configuration |
156 | | -with a `languageOptions.globals` object. We recommend setting up global variables for Browser APIs |
157 | | -as well as at least ES2015. |
158 | | - |
159 | | -Note for the ESLint VSCode Extension: Enable the "Use Flat Config" setting for your workspace to |
160 | | -enable Flat Config support. |
161 | | - |
162 | | -Flat configs are also available as `plugin.configs['flat/recommended']` and `plugin.configs['flat/typescript']`, after using `import plugin from 'eslint-plugin-solid'`. |
163 | | - |
164 | | -## Rules |
165 | | - |
166 | | -✔: Enabled in the `recommended` configuration. |
167 | | - |
168 | | -🔧: Fixable with [`eslint --fix`](https://eslint.org/docs/user-guide/command-line-interface#fixing-problems)/IDE auto-fix. |
169 | | - |
170 | | -<!-- AUTO-GENERATED-CONTENT:START (RULES) --> |
171 | | -| ✔ | 🔧 | Rule | Description | |
172 | | -| :---: | :---: | :--- | :--- | |
173 | | -| ✔ | 🔧 | [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. | |
174 | | -| ✔ | 🔧 | [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. | |
175 | | -| ✔ | 🔧 | [solid/imports](docs/imports.md) | Enforce consistent imports from "solid-js", "solid-js/web", and "solid-js/store". | |
176 | | -| ✔ | | [solid/jsx-no-duplicate-props](docs/jsx-no-duplicate-props.md) | Disallow passing the same prop twice in JSX. | |
177 | | -| ✔ | | [solid/jsx-no-script-url](docs/jsx-no-script-url.md) | Disallow javascript: URLs. | |
178 | | -| ✔ | 🔧 | [solid/jsx-no-undef](docs/jsx-no-undef.md) | Disallow references to undefined variables in JSX. Handles custom directives. | |
179 | | -| ✔ | | [solid/jsx-uses-vars](docs/jsx-uses-vars.md) | Prevent variables used in JSX from being marked as unused. | |
180 | | -| | | [solid/no-array-handlers](docs/no-array-handlers.md) | Disallow usage of type-unsafe event handlers. | |
181 | | -| ✔ | 🔧 | [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. | |
182 | | -| ✔ | 🔧 | [solid/no-innerhtml](docs/no-innerhtml.md) | Disallow usage of the innerHTML attribute, which can often lead to security vulnerabilities. | |
183 | | -| | | [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. | |
184 | | -| ✔ | 🔧 | [solid/no-react-deps](docs/no-react-deps.md) | Disallow usage of dependency arrays in `createEffect` and `createMemo`. | |
185 | | -| ✔ | 🔧 | [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. | |
186 | | -| ✔ | | [solid/no-unknown-namespaces](docs/no-unknown-namespaces.md) | Enforce using only Solid-specific namespaced attribute names (i.e. `'on:'` in `<div on:click={...} />`). | |
187 | | -| | 🔧 | [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. | |
188 | | -| ✔ | 🔧 | [solid/prefer-for](docs/prefer-for.md) | Enforce using Solid's `<For />` component for mapping an array to JSX elements. | |
189 | | -| | 🔧 | [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. | |
190 | | -| ✔ | | [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. | |
191 | | -| ✔ | 🔧 | [solid/self-closing-comp](docs/self-closing-comp.md) | Disallow extra closing tags for components without children. | |
192 | | -| ✔ | 🔧 | [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. | |
193 | | -<!-- AUTO-GENERATED-CONTENT:END --> |
194 | | - |
195 | | -## Troubleshooting |
196 | | - |
197 | | -The rules in this plugin provide sensible guidelines as well as possible, but there may be times |
198 | | -where you know better than the rule and want to ignore a warning. To do that, [add a |
199 | | -comment](https://eslint.org/docs/latest/user-guide/configuring/rules#disabling-rules) like the |
200 | | -following: |
201 | | - |
202 | | -```jsx |
203 | | -// eslint-disable-next-line solid/reactivity |
204 | | -const [editedValue, setEditedValue] = createSignal(props.value); |
205 | | -``` |
206 | | - |
207 | | -_Please note_: there may also be times where a rule correctly warns about a subtle problem, |
208 | | -even if it looks like a false positive at first. With `solid/reactivity`, please look at the |
209 | | -[reactivity docs](./docs/reactivity.md#troubleshooting) before deciding to disable the rule. |
210 | | - |
211 | | -When in doubt, feel free to [file an |
212 | | -issue](https://github.com/solidjs-community/eslint-plugin-solid/issues/new/choose). |
213 | | - |
214 | | -## Versioning |
215 | | - |
216 | | -Pre-1.0.0, the rules and the `recommended` and `typescript` configuations will be |
217 | | -stable across patch (`0.0.x`) versions, but may change across minor (`0.x`) versions. |
218 | | -If you want to pin a minor version, use a tilde in your `package.json`. |
219 | | - |
220 | | -<!-- AUTO-GENERATED-CONTENT:START (TILDE) --> |
221 | | -```diff |
222 | | -- "eslint-plugin-solid": "^0.14.1" |
223 | | -+ "eslint-plugin-solid": "~0.14.1" |
224 | | -``` |
225 | | -<!-- AUTO-GENERATED-CONTENT:END --> |
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