Package Exports

eslint-plugin-es

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Readme

eslint-plugin-es

ESLint plugin about ECMAScript syntactic features.

🏁 Goal

Espree, the default parser of ESLint, has supported ecmaVersion option. However, it doesn't support to enable each syntactic feature individually.

This plugin lets us disable each syntactic feature individually. So we can enable arbitrary syntactic features with the combination of ecmaVersion and this plugin.

💿 Installation

Use npm or yarn.

npm install --save-dev eslint eslint-plugin-es

Requirements

Node.js 6.5.0 or newer.
ESLint 4.19.1 or newer.

📖 Usage

Configure your .eslintrc.* file.

For example, to enable only Rest/Spread Properties in ES2018, as similar to legacy experimentalObjectRestSpread option:

{
    "plugins": ["es"],
    "parserOptions": {
        "ecmaVersion": 2018
    },
    "rules": {
        "es/no-async-iteration": "error",
        "es/no-malformed-template-literals": "error",
        "es/no-regexp-lookbehind-assertions": "error",
        "es/no-regexp-named-capture-groups": "error",
        "es/no-regexp-s-flag": "error",
        "es/no-regexp-unicode-property-escapes": "error"
    }
}

Rules

This plugin provides the following rules.

ES2018

Rule ID	Description
es/no-async-iteration	disallow async iteration.
es/no-malformed-template-literals	disallow template literals with invalid escape sequences.
es/no-regexp-lookbehind-assertions	disallow RegExp lookbehind assertions.
es/no-regexp-named-capture-groups	disallow RegExp named capture groups.
es/no-regexp-s-flag	disallow RegExp `s` flag.
es/no-regexp-unicode-property-escapes	disallow RegExp Unicode property escape sequences.
es/no-rest-spread-properties	disallow rest/spread properties.

ES2017

Rule ID	Description
es/no-async-functions	disallow async function declarations.
es/no-trailing-function-commas	disallow trailing function commas.

ES2016

Rule ID	Description
es/no-exponential-operators	disallow exponential operators.

ES2015

Rule ID	Description
es/no-arrow-functions	disallow arrow function expressions.
es/no-binary-numeric-literals	disallow binary numeric literals.
es/no-block-scoped-functions	disallow block-scoped function declarations.
es/no-block-scoped-variables	disallow block-scoped variable declarations.
es/no-classes	disallow class declarations.
es/no-computed-properties	disallow computed properties.
es/no-default-parameters	disallow default parameters.
es/no-destructuring	disallow destructuring.
es/no-for-of-loops	disallow `for-of` statements.
es/no-generators	disallow generator function declarations.
es/no-modules	disallow modules.
es/no-new-target	disallow `new.target` meta property.
es/no-octal-numeric-literals	disallow octal numeric literals.
es/no-property-shorthands	disallow property shorthands.
es/no-regexp-u-flag	disallow RegExp `u` flag.
es/no-regexp-y-flag	disallow RegExp `y` flag.
es/no-rest-parameters	disallow rest parameters.
es/no-spread-elements	disallow spread elements.
es/no-template-literals	disallow template literals.
es/no-unicode-codepoint-escapes	disallow Unicode code point escape sequences.

🚥 Semantic Versioning Policy

eslint-plugin-es follows semantic versioning and ESLint's semantic versioning policy.

📰 Changelog

See releases.

❤️ Contributing

Welcome contributing!

Please use GitHub's Issues/PRs.

Development Tools

npm test runs tests and measures coverage.
npm run clean removes the coverage result of npm test command.
npm run coverage shows the coverage result of npm test command.
npm run watch runs tests on each file change.