Change Log

All notable changes to this project will be documented in this file. This project adheres to Semantic Versioning.

12.0.1 - 2018-08-29

Since ESLint 5 no longer supports Node 4, standard silently passes when run in Node 4, which matches the current behavior for Node 0.10, 0.12, and all other unsupported versions of Node.

12.0.0 - 2018-08-28

New version of ESLint, new version of Standard!

When you upgrade, consider running standard --fix to automatically format your code to match the newly added rules.

New features

Update eslint from ~4.19.0 to ~5.4.0.
- Support JSXFragment nodes (e.g. <></>)
- Lots of minor changes to rules to catch more edge cases!
The README is now available in French! (Thanks @charliegerard!)
- Other community contributed translations exist in Spanish, Italian, Korean, Portuguese, Simplified Chinese, and Taiwanese Mandarin.
- More translations are welcome!

New rules

(Estimated % of affected standard users, based on test suite in parens)

Require spacing inside of braces (object-curly-spacing) #609 eslint-config-standard/#35 (29%)
Disallow APIs that were deprecated in Node 10 (no-deprecated-api) #1164 (15%)
- e.g. assert.equal(), assert.deepEqual() and assert.notEqual() were deprecated in Node 10.
Disallow self assignment of properties (no-self-assign) #1186 (0%)

Changed rules

None.

11.0.0 - 2018-02-18

This release has no new rules, but it does update to the latest version of eslint, version 4, which has some significant changes to existing rules. Most updates make the indentation rules more strict.

Thankfully, most users will just need to run standard --fix to update code to be compliant.

New features

Update eslint from ~3.19.0 to ~4.18.0.
- The indent rule is more strict.
- The padded-blocks rule is more strict.
- The space-before-function-paren rule is more strict.
- The no-multi-spaces rule is more strict.
- Minor improvements to:
- no-extra-parens,
- no-unexpected-multiline,
- no-regex-spaces, and
- space-unary-ops
Update eslint-plugin-import from ~2.2.0 to ~2.8.0
- Updated for eslint 4.0 compatibility.
- Various small bug fixes included related to import/* rules.
Update eslint-plugin-node from ~4.2.2 to ~6.0.0
- The no-deprecated-api rule is updated with Node.js 8 support and improved Node 6 support.
Upodate eslint-plugin-promise from ~3.5.0 to ~3.6.0.
Update eslint-plugin-react from ~6.10.0 to ~7.6.1
- Fix jsx-indent crash
- Fix jsx-indent indentation calculation with nested JSX.
- Fix jsx-no-undef will not check the global scope by default.
- Fix jsx-curly-spacing newline with object literals bug.
- Fix jsx-curly-spacing schema incompatibility with ESLint 4.2.0.
- Fix alignment bug in jsx-indent.

Changed rules

Relax rule: Don't mark Rails Asset Pipeline comments (comments that start with //=) as errors. (spaced-comment) #918

👏 Huge thanks to @Flet for putting together most of this release!

10.0.3 - 2017-08-06

Internal changes (incremented dependency versions)

10.0.2 - 2017-04-14

Changed rules

Relax rule: Disallow import of modules using absolute paths (import/no-absolute-path) #861
- This rule was responsible for up to 25% of the running time of standard, so we are disabling it until its performance improves.

10.0.1 - 2017-04-06

Internal changes (incremented dependency versions)

10.0.0 - 2017-04-04

standard just turned 10.0.0! 🎉

As with every new major release, there are lots of new rules in 10.0.0 designed to help catch bugs and make programmer intent more explicit.

standard is more popular than ever – 330,000 downloads per month! It's even more popular – 670,000 downloads per month – if you include the shareable ESLint config that we also publish.

The most important change in 10.0.0 is that using deprecated Node.js APIs is now considered an error. It's finally time to update those dusty old APIs!

Deprecated APIs are problematic because they may print warning messages in the console in recent versions of Node.js. This often confuses users and leads to unnecessary support tickets for project maintainers.

Some deprecated APIs are even insecure (or at least prone to incorrect usage) which can have serious security implications. For that reason, standard now considers usage of Buffer(num) to be an error, since this function returns uninitialized program memory which could contain confidential information like passwords or keys.

Instead of Buffer(num), consider using Buffer.alloc(num) or Buffer.from(obj) which make the programmer's intent clearer. These functions exist in all currently supported versions of Node.js, including Node.js 4.x. For more background, see this Node.js issue.

We also improved some rules to support common patterns in code bases that use React, JSX, and Flow.

When you upgrade, consider running standard --fix to automatically fix some of the issues caught by this new version.

New features

Update ESLint from 3.15.x to 3.19.x.
Node.js API: Add standard.lintTextSync method

New rules

(Estimated % of affected standard users, based on test suite in parens)

Disallow using deprecated Node.js APIs (node/no-deprecated-api) #693 (13%)
- Ensures that code always runs without warnings on the latest versions of Node.js
- Ensures that safe Buffer methods (Buffer.from(), Buffer.alloc()) are used instead of Buffer()
Enforce callbacks always called with Node.js-style error first (standard/no-callback-literal) #623 (3%)
- Functions named callback or cb must be invoked with null, undefined, or an Error as the first argument
- Disallows using a string instead of an Error object
- Disallows confusing callbacks that do not follow the standard Node.js pattern
Disallow any imports that come after non-import statements (import/first) #806 (1%)
Disallow unnecessary return await (no-return-await) #695 (0%)
Disallow comma-dangle in functions (comma-dangle) #787 (0%)
Disallow repeated exports of names or defaults (import/export) #806 (0%)
Disallow import of modules using absolute paths (import/no-absolute-path) #806 (0%)
Disallow Webpack loader syntax in imports (import/no-webpack-loader-syntax) #806 (0%)
Disallow comparing against -0 (no-compare-neg-zero) #812 (0%)

Changed rules

Relax rule: allow using ...rest to omit properties from an object (no-unused-vars) #800
- This is a common and useful pattern in React/JSX apps!
Relax rule: allow Flow import type statements (import/no-duplicates) #599
- These are no longer considered to be "duplicate imports"
Relax rule: Treat process.exit() the same as throw in code path analysis (node/process-exit-as-throw) #699
- Makes certain other rules work better and give fewer false positives
Relax rule: allow Unnecessary Labels (no-extra-label)
- Redundant, since "no-labels" is already enabled, which is more restrictive

9.0.2 - 2017-03-17

Changed rules

Relax rule: Allow tagged template string expressions (no-unused-expressions) #822

9.0.1 - 2017-03-07

Changed rules

Relax rule: Allow mixing basic operators without parens (no-mixed-operators) #816
- Specifically, these operators: +, -, *, /, %, and **

9.0.0 - 2017-02-28

It's time for a new major version of standard! As usual, this release contains a bunch of awesomeness to help you keep your code in tip-top shape!

We've added several new rules designed to catch potential programmer errors (i.e. bugs), as well as rules to make programmer intent more explicit in certain circumstances.

This release continues our trend of tightening up rules so that, wherever possible, there's one "right" way to do things. This design goal is intended to reduce the time that teams and maintainers spend giving code review feedback in pull requests.

When you upgrade, consider running standard --fix to automatically fix some of the errors caught by the new rules in this version.

Note: If you use the Chai test framework, you will need to make some changes to your tests to improve their robustness. Read about the changes you need to make.

New features

Update ESLint from 3.10.x to 3.15.x
3 additional rules are now fixable with standard --fix

New rules

(Estimated % of affected standard users, based on test suite in parens)

Disallow mixing different operators without parens (no-mixed-operators) #566 (5%)
Enforce 1 newline at end of file (previously 1 or 2 were ok) (no-multiple-empty-lines) #733 (3%)
Disallow Unused Expressions (no-unused-expressions) #690 (3%)
- Note: this affects users of the Chai test framework. Read about the changes you need to make.
Disallow redundant return statements (no-useless-return) #694 (1%)
Disallow Incorrect Early Use (no-use-before-define) #636 (0%)
Enforce that Promise rejections are passed an Error object as a reason (prefer-promise-reject-errors) #777 (0%)
Enforce comparing typeof expressions against string literals (valid-typeof) #629 (0%)
Enforce spacing around * in generator functions (generator-star-spacing) #724 (0%)
Disallow Unnecessary Labels (no-extra-label) #736 (0%)
Disallow spacing between template tags and their literals (template-tag-spacing) #755 (0%)
Disallow padding within switch statements and classes (padded-blocks) #610 (0%)
Enforce that Symbols are passed a description (symbol-description) #630 (0%)

Changed rules

Relax rule: allow TypeScript Triple-Slash Directives (spaced-comment) #660
Relax rule: allow Flow Comments (spaced-comment) #661

8.6.0 - 2016-11-22

Update ESLint from 3.8.x to 3.10.x
3 additional rules are now fixable with standard --fix

8.5.0 - 2016-10-25

Update ESLint from 3.7.x to 3.8.x
2 additional rules are now fixable with standard --fix

8.4.0 - 2016-10-10

Update ESLint from 3.6.x to 3.7.x
5 additional rules are now fixable with standard --fix
Use more conservative semver ranges #654

8.3.0 - 2016-09-29

The last release (8.2.0) added ES7 support. This release (8.3.0) adds ES8 support ...just 3 days later!

This release should eliminate the need to specify babel-eslint as a custom parser, since standard can now parse ES8 (i.e. ES2017) syntax out of the box. That means async and await will just work.

Support ES8 (i.e. ES2017) syntax.

8.2.0 - 2016-09-26

For many users, this release should eliminate the need to specify babel-eslint as a custom parser, since standard can now parse ES7 (i.e. ES2016) syntax out of the box.

Support ES7 (i.e. ES2016) syntax.
Update ESLint from 3.5.x to 3.6.x
4 additional rules are now fixable with standard --fix

8.1.0 - 2016-09-17

Update ESLint from 3.3.x to 3.5.x
Around 10 additional rules are now fixable with standard --fix

8.0.0 - 2016-08-23

This release contains a bunch of goodies, including new rules that catch potential programmer errors (i.e. bugs) and enforce additional code consistency.

However, the best feature is surely the new --fix command line flag to automatically fix problems. If you ever used standard-format and ran into issues with the lack of ES2015+ support, you'll be happy about --fix.

standard --fix is built into standard v8.0.0 for maximum convenience, it supports ES2015, and it's lightweight (no additional dependencies since it's part of ESLint which powers standard). Lots of problems are already fixable, and more are getting added with each ESLint release.

standard also outputs a message ("Run standard --fix to automatically fix some problems.") when it detects problems that can be fixed automatically so you can save time!

With standard v8.0.0, we are also dropping support for Node.js versions prior to v4. Node.js 0.10 and 0.12 are in maintenance mode and will be unsupported at the end of 2016. Node.js 4 is the current LTS version. If you are using an older version of Node.js, we recommend upgrading to at least Node.js 4 as soon as possible. If you are unable to upgrade to Node.js 4 or higher, then we recommend continuing to use standard v7.x until you are ready to upgrade Node.js.

Important: We will not be updating the standard v7.x versions going forward. All bug fixes and enhancements will land in standard v8.x.

Full changelog below. Cheers!

New features

Upgrade to ESLint v3 (http://eslint.org/docs/user-guide/migrating-to-3.0.0) #565
- BREAKING: Drop support for node < 4 (this was a decision made by the ESLint team)
Expose ESLint's --fix command line flag #540 standard-engine/#107
- Lightweight, no additional dependencies, fixes dozens of rules automatically

New rules

(Estimated % of affected standard users, based on test suite in parens)

Enforce placing object properties on separate lines (object-property-newline) #524 (2%)
Require block comments to be balanced (spaced-comment "balanced") #572 (2%)
Disallow constant expressions in conditions (no-constant-condition) #563 (1%)
Disallow renaming import, export, and destructured assignments to the same name (no-useless-rename) #537 (0%)
Disallow spacing between rest and spread operators and their expressions (rest-spread-spacing) #567 (0%)
Disallow the Unicode Byte Order Mark (BOM) (unicode-bom) #538 (0%)
Disallow assignment to native objects/global variables (no-global-assign) #596 (0%)
Disallow negating the left operand of relational operators (no-unsafe-negation) #595 (0%)
Disallow template literal placeholder syntax in regular strings (no-template-curly-in-string) #594 (0%)
Disallow tabs in file (no-tabs) #593 (0%)

Changed rules

Relax rule: Allow template literal strings (backtick strings) to avoid escaping  #421
Relax rule: Do not enforce spacing around * in generator functions (standard#564 (comment))
- This is a temporary workaround for babel users who use async generator functions.

7.1.2 - 2016-06-03

Fix install errors for some users by updating eslint peer dependency

7.1.1 - 2016-05-26

Add back full node 0.10, 0.12 support

7.1.0 - 2016-05-16

Upgrade eslint to version ~2.10.2

7.0.1 - 2016-05-04

Relax "no-duplicate-imports" rule to not include export so the following is allowed:

import { foo } from 'bar'
export * from 'bar'

7.0.0 - 2016-05-02

Changes

Upgrade eslint to version ~2.9.0
Remove "rules" configuration option #367 from package.json (Reasoning is here)

New rules

Estimated % of affected standard users, based on test suite

Require camelCase (camelcase) [4%]
Disallow unnecessary escape usage (no-useless-escape) [4% -- but, including many bugs]
Disallow duplicate imports (no-duplicate-imports) [0%]
Disallow unmodified conditions of loops (no-unmodified-loop-condition) [0%]
Disallow whitespace before properties (no-whitespace-before-property) [0%]
Disallow control flow statements in finally blocks (no-unsafe-finally) [0%]
Disallow unnecessary computed property keys on objects (no-useless-computed-key) [0%]
Validate spacing before closing bracket in JSX (react/jsx-space-before-closing) [0%]

Removed rules

Require parens in arrow function arguments (arrow-parens)

6.0.8 - 2016-03-07

Pin eslint to version ~2.2.0
Update eslint-plugin-react to version 4.0.0

6.0.7 - 2016-02-18

Revert: Use install location of standard as eslint cwd (fixes #429)

6.0.6 - 2016-02-18

Use eslint 2.1.0
Fix: Use install location of standard as eslint cwd (fixes snazzy/#8)

6.0.5 - 2016-02-12

Use eslint 2.0.0 stable

6.0.4 - 2016-02-07

Relax rule: Validate closing bracket location in JSX (jsx-closing-bracket-location)

6.0.3 - 2016-02-06

Fix "Error: Cannot find module 'eslint-config-standard-jsx'" with npm 2 (node 0.10, 0.12, 4)

6.0.2 - 2016-02-06

Internal change: Remove .eslintrc file, and use inline config

6.0.1 - 2016-02-05

Internal change: Move .eslintrc file to root folder

6.0.0 - 2016-02-05

The goal of this release is to make standard faster to install, and simpler to use.

Remove `standard-format` (#340) (#397)

Eliminates 250 packages, and cuts install time in half!
For npm 2, install time goes from 20 secs —> 10 secs.
For npm 3, install time goes from 24 secs —> 12 secs.
To continue using standard-format, just install it separately: npm install -g standard-format

React-specific linting rules are removed (#351) (#367) (eslint-config-standard-react/#13)

JSX is still supported, and it continues to be checked for style.
There were only a few React-specific rules, but they made it extremely difficult for users of alternatives like virtual-dom or deku, and unecessarily tied standard to a single library.
JSX rules come from eslint-config-standard-jsx. The eslint-config-standard-react dependency was removed.

New Rules

The percentage (%) of users that rule changes will effect, based on real-world testing of the top ~400 npm packages is denoted in brackets.

Disallow __dirname/__filename string concatenation (#403) (no-path-concat) [5%]
Require parens in arrow function arguments  (#309) (arrow-parens) [5%]
Ensure that new Promise() is instantiated with the parameter names resolve, reject (#282) (promise/param-names) [1%]
Enforce Usage of Spacing in Template Strings (template-curly-spacing) [1%]
Template strings are only allowed when necessary, i.e. template string features are being used (eslint got stricter: eslint/eslint#5147) [1%]
Better dead code detection after conditional statements (eslint got stricter) [1%]
Enforce spaces around * in yield * something (#335) (yield-star-spacing) [0%]
Disallow labels on loops/switch statements too (made rule stricter) (no-labels) [0%]
Disallow unnecessary constructor (no-useless-constructor) [0%]
Disallow empty destructuring patterns (no-empty-pattern) [0%]
Disallow Symbol Constructor (no-new-symbol) [0%]
Disallow Self Assignment (no-self-assign) [0%]

Removed Rules

parseInt() radix rule because ES5 fixes this issue (#384)  (radix) [0%]

Expose eslint configuration via command line options and `package.json`

For power users, it might be easier to use one of these new hooks instead of forking standard, though that's still encouraged, too!

Set eslint "plugins" (#386)
Set eslint "rules" (#367)
Set eslint "env" (#371)

To set custom ESLint plugins, rules, or envs, use the command line --plugin, --rules, and --env flags.

In package.json, use the "standard" property:

{
  "standard": {
    "plugins": [ "my-plugin" ]
  }
}

Upgrade to ESLint v2

There may be slight behavior changes to existing rules. When possible, we've noted these in the "New Rules" and "Removed Rules" section.

Improve test suite

Rule changes can be tested against every package on npm. For sanity, this is limited to packages with at least 4 dependents. Around ~400 packages.

Known Issues

Using prerelease eslint version (2.0.0-rc.0). There may be breaking changes before the stable release.
no-return-assign behavior changed with arrow functions (eslint/eslint#5150)

Relevant diffs

standard (v5.4.1...v6.0.0)
eslint-config-standard (v4.4.0...v5.0.0)
eslint-config-standard-jsx (v1.0.0)
standard-engine (v2.2.4...v3.2.1)

5.4.1 - 2015-11-16

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Fixed

Fix for standard-engine change. Fix error tagline.

5.4.0 - 2015-11-16

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Added

eslint-config-standard-react@1.2.0 (history)
- Disallow duplicate JSX properties

5.3.1 - 2015-09-18

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Changed

eslint-plugin-react@3.4.2 (history)

5.3.0 - 2015-09-16

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Changed

eslint-config-standard@4.4.0 (history)
- New rule: must have space after semicolon in for-loop (commit)
- New rule: No default assignment with ternary operator (commit)
- New rule: Require spaces before keywords (commit)
eslint-config-standard-react@1.1.0 (history)
eslint-plugin-react@3.4.0 (history)
eslint-plugin-standard@1.3.1 (history)

5.2.2

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Fixed

We have a changelog now, and you're reading it!
Minor README update
Removed direct dependency on eslint (its now moved to standard-engine)

5.2.1 - 2015-09-03

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Changed

eslint-config-standard@4.3.1 (history)
- Revert rule: Disallow unncessary concatenation of strings

Fixed

eslint-config-standard@4.3.1 (history)
- fix regression with ternary operator handling

5.2.0 - 2015-09-03

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Added

eslint-config-standard@4.3.0 (history)
- New rule: Disallow unncessary concatenation of strings
- New rule: Disallow duplicate name in class members
- New rule: enforce spaces inside of single line blocks
- Re-add rule: padded-blocks (Closes #170)

Changed

Bump eslint from 1.1.0 to 1.3.1 (CHANGELOG)
eslint-plugin-standard@1.3.0 (history)
- A small change to make the plugin compatible with browserify which does not affect behavior.

Fixed

eslint-plugin-react@3.3.1 (CHANGELOG)
- Fix object rest/spread handling.
Added white background to badge.svg to make it work with dark backgrounds (Closes #234)
Minor updates to README.md

5.1.1 - 2015-08-28

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Fixed

Update to RULES.md to remove a missing hyperlink
Add atom linter information to README.md
Fixed duplicated word in the tagline message on the CLI
Removed failing repository from tests (yoshuawuyts/initialize)

5.1.0 - 2015-08-14

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Fixed

eslint-config-standard@4.1.0 (history)
- Added rest/spread feature to eslintrc.json to fix #226 and eslint-plugin-standard#3
eslint-plugin-react@3.2.2 (CHANGELOG)
- Fix crash when propTypes don't have any parent
- Fix jsx-no-literals reporting errors outside JSX