eslint-plugin-summer

2.0.1 verified Fri May 01 auth: no javascript

An ESLint plugin that enforces coding style rules themed around 'summer', including restrictions on null/undefined comparisons, let usage, and plain new Date() calls. Version 2.0.1 requires ESLint ^4.0.0 || ^5.0.0 || ^6.0.0 || ^7.0.0. It provides a recommended config and a set of opinionated rules. The plugin is lightweight and focuses on specific style preferences rather than general linting.

Common errors

error ESLint: Failed to load plugin 'summer': Cannot find module 'eslint-plugin-summer' ↓

cause Plugin not installed or not in node_modules.

fix

Run 'npm install --save-dev eslint-plugin-summer'.

error ESLint: Rule 'summer/no-let' not found ↓

cause Incorrect rule name or plugin not registered.

fix

Ensure plugin is listed in 'plugins' array and rule name is correct.

error Configuration for rule 'summer/no-eqeqeq-null-undefined' is invalid ↓

cause Invalid rule options or severity level.

fix

Set severity to 'off', 'warn', or 'error' without extra options.

Warnings

gotcha Plugin expects ESLint version 4, 5, 6, or 7. Does not work with ESLint 8 or later. ↓

fix Use ESLint 7.x or earlier, or check for newer versions of the plugin.

gotcha The rule 'no-eqeqeq-null-undefined' does not cover all null/undefined comparisons; only strict equality with null or undefined is flagged. ↓

fix Review the rule documentation for exact patterns.

gotcha The plugin's recommended config may conflict with other style rules from other plugins. ↓

fix Test well when combining with other configs.

Install

npm install eslint-plugin-summer

yarn add eslint-plugin-summer

pnpm add eslint-plugin-summer

Imports

Plugin
wrong
```
// using 'eslint-plugin-summer' in plugins
```
correct
```
// .eslintrc: plugins: ['summer']
```
ESLint plugin naming convention: drop the 'eslint-plugin-' prefix.

Rules

wrong

// rules: { 'no-let': 'error' }

correct

// .eslintrc: rules: { 'summer/no-let': 'error' }

All rules must be prefixed with 'summer/'.

Recommended config
wrong
```
extends: ['summer/recommended']
```
correct
```
extends: ['plugin:summer/recommended']
```
Configs are accessed via 'plugin:summer/recommended'.

Quickstart

ESLint configuration enabling all three summer plugin rules.

// .eslintrc file
{
  "plugins": ["summer"],
  "rules": {
    "summer/no-eqeqeq-null-undefined": "error",
    "summer/no-let": "error",
    "summer/no-plain-new-date": "error"
  }
}