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3.0.0 and Newer Versions

Please refer to CHANGELOG.md for the newer versions.

2.1.8 (March 7, 2019)

v2.1.8 is a maintenance release that reapplies the TypeScript speed improvements (#6406) in a new major version of react-dev-utils.

Migrating from 2.1.7 to 2.1.8

Inside any created project that has not been ejected, run:

npm install --save --save-exact [email protected]

or

yarn add --exact [email protected]

2.1.7 (March 7, 2019)

v2.1.7 is a maintenance release that temporarily reverts the TypeScript speed improvements (#6406) to fix a dependency issue in react-dev-utils.

Migrating from 2.1.6 to 2.1.7

Inside any created project that has not been ejected, run:

npm install --save --save-exact [email protected]

or

yarn add --exact [email protected]

2.1.6 (March 6, 2019)

v2.1.6 is a maintenance release that brings a few new improvements, most notably:

  • 🚀 Reduced TypeScript rebuild times while running the development server. This was previously introduced in v2.1.4 but had to be reverted. Thanks to @ianschmitz for getting this ready.

🐛 Bug Fix

💅 Enhancement

  • react-dev-utils, react-scripts
  • create-react-app
    • #6253 Only use yarn.lock.cached if using the default Yarn registry. (@hangryCat)
  • react-scripts

📝 Documentation

🏠 Internal

🔨 Underlying Tools

  • react-scripts
    • #6387 Use contenthash instead of chunkhash for better long-term caching. (@ianschmitz)
  • Other

Committers: 15

Migrating from 2.1.5 to 2.1.6

Inside any created project that has not been ejected, run:

npm install --save --save-exact [email protected]

or

yarn add --exact [email protected]

2.1.5 (February 11, 2019)

v2.1.5 is a maintenance release that reverts the TypeScript speed improvements (#5903) to fix a dependency issue in react-dev-utils.

Migrating from 2.1.4 to 2.1.5

Inside any created project that has not been ejected, run:

npm install --save --save-exact [email protected]

or

yarn add --exact [email protected]

2.1.4 (February 10, 2019)

v2.1.4 is a maintenance release that brings a number of awesome improvements. A few notable ones include:

  • 🚀 Reduced TypeScript rebuild times while running the development server. TypeScript is now blazing fast! Special thanks to @deftomat and @johnnyreilly and the other contributors for their hard work on this. (#5903)
  • Jest type ahead support which provides a much nicer experience when filtering your tests using the Jest CLI (#5213)
  • And many more improvements!

🐛 Bug Fix

💅 Enhancement

📝 Documentation

🏠 Internal

  • Other
  • react-scripts
  • react-dev-utils, react-scripts
  • babel-plugin-named-asset-import, react-scripts
  • react-dev-utils
  • babel-preset-react-app, react-app-polyfill, react-dev-utils, react-error-overlay, react-scripts

🔨 Underlying Tools

  • babel-preset-react-app, react-app-polyfill, react-dev-utils, react-scripts
  • babel-preset-react-app
  • eslint-config-react-app, react-scripts
    • #6132 Bump eslint-plugin-react version and update webpack config. (@ianschmitz)

Committers: 29

Migrating from 2.1.3 to 2.1.4

Inside any created project that has not been ejected, run:

npm install --save --save-exact [email protected]

or

yarn add --exact [email protected]

2.1.3 (January 4, 2019)

v2.1.3 is a maintenance release to fix a vulnerability in webpack-dev-server.

📝 Documentation

🏠 Internal

🔨 Underlying Tools

  • react-scripts
    • #6064 Update webpack-dev-server 3.1.9 -> 3.1.14. (@Friss)

Committers: 8

Migrating from 2.1.2 to 2.1.3

Inside any created project that has not been ejected, run:

npm install --save --save-exact [email protected]

or

yarn add --exact [email protected]

2.1.2 (December 23, 2018)

v2.1.2 is a maintenance release including various bug fixes.

🚀 New Feature

  • babel-preset-react-app
    • #5487 Add allowESModules option to babel-preset-react-app (@Pajn)

🐛 Bug Fix

  • create-react-app
  • babel-preset-react-app
  • babel-plugin-named-asset-import
    • #5573 Fix named-asset-import plugin to work with export-as syntax (@NShahri)
  • react-app-polyfill
  • react-scripts

💅 Enhancement

📝 Documentation

🏠 Internal

  • react-scripts
  • Other
  • react-dev-utils
  • react-error-overlay
    • #5451 fix: add sideEffects: false to react-error-overlay. (@SimenB)
  • babel-preset-react-app
    • #5487 Add allowESModules option to babel-preset-react-app. (@Pajn)
  • create-react-app

Committers: 36

Migrating from 2.1.1 to 2.1.2

Inside any created project that has not been ejected, run:

npm install --save --save-exact [email protected]

or

yarn add --exact [email protected]

2.1.1 (October 31, 2018)

Happy Halloween 🎃 👻! This spooky release brings a treat: decorator support in TypeScript files!

🐛 Bug Fix

  • babel-preset-react-app
  • react-scripts

💅 Enhancement

  • babel-preset-react-app

📝 Documentation

🏠 Internal

  • react-error-overlay
  • babel-plugin-named-asset-import
  • react-scripts
    • #5651 Make serviceWorker config argument optional in typescript. (@eddedd88)

Committers: 8

Migrating from 2.1.0 to 2.1.1

Inside any created project that has not been ejected, run:

npm install --save --save-exact [email protected]

or

yarn add --exact [email protected]

2.1.0 (October 29, 2018)

Create React App 2.1 adds support for TypeScript! Read the documentation to get started.

New applications can be created using TypeScript by running:

$ npx create-react-app my-app --typescript

🚀 New Feature

  • create-react-app, react-scripts
  • babel-preset-react-app, react-scripts

🐛 Bug Fix

💅 Enhancement

  • create-react-app, react-scripts
    • #5593 Refine how TypeScript types are handled. (@Timer)
  • react-scripts
  • react-dev-utils, react-scripts

📝 Documentation

🏠 Internal

Committers: 15

Migrating from 2.0.5 to 2.1.0

Inside any created project that has not been ejected, run:

npm install --save --save-exact [email protected]

or

yarn add --exact [email protected]

2.0.5 (October 14, 2018)

🐛 Bug Fix

  • react-dev-utils

  • create-react-app

    • #5362 Fix CI: non-semver compliant Yarn versions. (@Timer)

  • react-scripts

    • #5301 Fix TypeError when registering service workers without config. (@peterbe)

💅 Enhancement

  • babel-preset-react-app

    • #4984 Use the correct dependency for babel-plugin-dynamic-import-node. (@vikr01)

  • react-scripts

📝 Documentation

🏠 Internal

  • Other

  • create-react-app

    • #5362 Fix CI: non-semver compliant Yarn versions. (@Timer)

  • react-scripts

    • #5317 Remove unused require for getCacheIdentifier after ejecting. (@benbrandt)

Committers: 23

Migrating from 2.0.4 to 2.0.5

Inside any created project that has not been ejected, run:

npm install --save --save-exact [email protected]

or

yarn add --exact [email protected]

2.0.4 (October 3, 2018)

🐛 Bug Fix

  • react-scripts
  • babel-preset-react-app

💅 Enhancement

  • create-react-app
  • react-scripts

📝 Documentation

🏠 Internal

Committers: 11

Migrating from 2.0.3 to 2.0.4

Inside any created project that has not been ejected, run:

npm install --save --save-exact [email protected]

or

yarn add --exact [email protected]

2.0.3 (October 1, 2018)

Create React App 2.0 brings a year’s worth of improvements in a single dependency update. We summarized all of the changes in a blog post!

Check it out: Create React App 2.0: Babel 7, Sass, and More.

It provides a high-level overview of new features and improvements. Now let's see how to update your app to the latest version in detail.

Migrating from 1.x to 2.0.3

Inside any created project that has not been ejected, run:

npm install --save --save-exact [email protected]

or

yarn add --exact [email protected]

If you previously ejected but now want to upgrade, one common solution is to find the commits where you ejected (and any subsequent commits changing the configuration), revert them, upgrade, and later optionally eject again. It’s also possible that the feature you ejected for (maybe Sass or CSS Modules?) is now supported out of the box. You can find a list of notable new features in the Create React App 2.0 blog post.

Breaking Changes

Like any major release, [email protected] contains a few breaking changes. We expect that they won't affect every user, but we recommend to scan over these sections to see if something is relevant to you. If we missed something, please file a new issue.

Node 6 is no longer supported

Please upgrade to Node 8 (LTS) or later.

Polyfills for IE 9, IE 10, and IE 11 are no longer included by default (but you can opt in!)

We have dropped default support for Internet Explorer 9, 10, and 11. If you still need to support these browsers, follow the instructions below.

First, install react-app-polyfill:

npm install react-app-polyfill

or

yarn add react-app-polyfill

Next, place one of the following lines at the very top of src/index.js:

import 'react-app-polyfill/ie9'; // For IE 9-11 support
import 'react-app-polyfill/ie11'; // For IE 11 support

You can read more about these polyfills here.

Dynamic import() of a CommonJS module now has a .default property

Webpack 4 changed the behavior of import() to be closer in line with the specification.

Previously, importing a CommonJS module did not require you specify the default export. In most cases, this is now required. If you see errors in your application about ... is not a function, you likely need to update your dynamic import, e.g.:

const throttle = await import('lodash/throttle');
// replace with
const throttle = await import('lodash/throttle').then(m => m.default);

require.ensure() is superseded by dynamic import()

We previously allowed code splitting with a webpack-specific directive, require.ensure(). It is now disabled in favor of import(). To switch to import(), follow the examples below:

Single Module

require.ensure(['module-a'], function() {
  var a = require('module-a');
  // ...
});

// Replace with:
import('module-a').then(a => {
  // ...
});

Multiple Module

require.ensure(['module-a', 'module-b'], function() {
  var a = require('module-a');
  var b = require('module-b');
  // ...
});

// Replace with:
Promise.all([import('module-a'), import('module-b')]).then(([a, b]) => {
  // ...
});

The default Jest environment was changed to jsdom

Look at the test entry in the scripts section of your package.json. Here's a table how to change it from "before" and "after", depending on what you have there:

1.x (if you have this...) 2.x (...change it to this!)
react-scripts test --env=jsdom react-scripts test
react-scripts test react-scripts test --env=node

Object proxy configuration is superseded by src/setupProxy.js

To check if action is required, look for the proxy key in package.json and follow this table:

  1. I couldn't find a proxy key in package.json
    • No action is required!
  2. The value of proxy is a string (e.g. http://localhost:5000)
    • No action is required!
  3. The value of proxy is an object
    • Follow the migration instructions below.

It's worth highlighting: if your proxy field is a string, e.g. http://localhost:5000, or you don't have it, skip this section. This feature is still supported and has the same behavior.

If your proxy is an object, that means you are using the advanced proxy configuration. It has become fully customizable so we removed the limited support for the object-style configuration. Here's how to recreate it.

First, install http-proxy-middleware using npm or Yarn:

npm install http-proxy-middleware

or

yarn add http-proxy-middleware

Next, create src/setupProxy.js and place the following contents in it:

const proxy = require('http-proxy-middleware');

module.exports = function(app) {
  // ...
};

Now, migrate each entry in your proxy object one by one, e.g.:

"proxy": {
  "/api": {
    "target": "http://localhost:5000/"
    },
  "/*.svg": {
    "target": "http://localhost:5000/"
  }
}

Place entries into src/setupProxy.js like so:

const proxy = require('http-proxy-middleware');

module.exports = function(app) {
  app.use(proxy('/api', { target: 'http://localhost:5000/' }));
  app.use(proxy('/*.svg', { target: 'http://localhost:5000/' }));
};

You can also use completely custom logic there now! This wasn't possible before.

.mjs file extension support is removed

Change the extension of any files in your project using .mjs to just .js.

It was removed because of inconsistent support from underlying tools. We will add it back after it stops being experimental, and Jest gets built-in support for it.

PropTypes definitions are now removed in production

Normally, this shouldn't affect your logic and should make the resulting bundle smaller. However, you may be relying on PropTypes definition for production logic. This is not recommended, and will break now. If a library does it, one possible solution is to file an issue in it with a proposal to use a different field (not propTypes) to signal that the declaration needs to be retained.

Anything missing?

This was a large release, and we might have missed something.

Please file an issue and we will try to help.

Migrating from 2.0.0-next.xyz

If you used 2.x alphas, please follow these instructions.

Detailed Changelog

For a readable summary of the changes, check out our blog post.

🚀 New Feature

  • react-scripts
  • react-dev-utils, react-scripts
  • babel-preset-react-app
  • babel-preset-react-app, confusing-browser-globals, eslint-config-react-app, react-dev-utils, react-error-overlay, react-scripts
  • create-react-app
  • babel-preset-react-app, react-scripts

💥 Breaking Change

  • react-app-polyfill, react-scripts
  • react-scripts
  • react-dev-utils
  • babel-preset-react-app
    • #3818 Remove PropTypes from production build (#209) (@iansu)
  • eslint-config-react-app
    • #2319 Changes no-unused-expressions lint from warning to error (@amupitan)
  • eslint-config-react-app, react-error-overlay, react-scripts
  • eslint-config-react-app, react-scripts

🐛 Bug Fix

  • react-scripts
  • react-error-overlay
    • #5203 Fix IE 11 compatibility (@Timer)
    • #5198 Polyfill error overlay for IE9 support (@Timer)
    • #4024 Fix floating caret position incorrect while scrolling overlay (@jihchi)
  • react-dev-utils
  • babel-preset-react-app
  • babel-preset-react-app, react-error-overlay, react-scripts
  • react-app-polyfill
  • react-error-overlay, react-scripts
  • babel-preset-react-app, react-scripts
    • #5078 Prevent the cache of files using Babel Macros (@Timer)
  • react-dev-utils, react-error-overlay, react-scripts
  • create-react-app
    • #4677 Support scoped package names for scripts-version option in create-react-app cli (@bugzpodder)
    • #2705 Don't delete error logs when install fails (@mg)
  • react-dev-utils, react-scripts
  • babel-plugin-named-asset-import, babel-preset-react-app, eslint-config-react-app, react-dev-utils, react-error-overlay, react-scripts
  • create-react-app, react-dev-utils, react-scripts

💅 Enhancement

  • create-react-app, react-scripts
  • react-dev-utils, react-scripts
  • react-dev-utils
  • react-scripts
  • babel-preset-react-app, react-error-overlay, react-scripts
  • react-dev-utils, react-error-overlay, react-scripts
    • #4930 Switch from cheap-module-source-map eval-source-map (@jasonLaster)
    • #3124 update jest to 22 and support watchPathIgnorePatterns configuration (@aisensiy)
  • confusing-browser-globals, react-dev-utils, react-error-overlay, react-scripts
  • babel-preset-react-app, confusing-browser-globals, eslint-config-react-app, react-dev-utils, react-error-overlay, react-scripts
  • babel-preset-react-app
  • create-react-app
    • #4375 fix: update envinfo + implementation, update issue_template (@tabrindle)
  • eslint-config-react-app, react-error-overlay, react-scripts
    • #4048 Add ESLint check for incorrect propTypes usage (#3840) (@iansu)
    • #2690 Bump eslint-plugin-jsx-a11y version (@gaearon)
  • eslint-config-react-app
  • create-react-app, react-dev-utils, react-scripts
  • babel-preset-react-app, create-react-app, react-dev-utils, react-error-overlay, react-scripts
  • babel-preset-react-app, react-scripts
    • #3770 Loosen Babel preset to use browserslist (@Timer)
  • babel-preset-react-app, eslint-config-react-app, react-dev-utils, react-error-overlay, react-scripts

📝 Documentation

🏠 Internal

  • eslint-config-react-app
    • #5205 Disable react/no-deprecated rule (@Timer)
    • #5051 Adjust ESLint configuration for v5 (@Timer)
    • #4187 Change no-unused-vars 'args' from none to all to show warning on dest… (@goncy)
  • babel-plugin-named-asset-import, babel-preset-react-app, confusing-browser-globals, create-react-app, eslint-config-react-app, react-app-polyfill, react-dev-utils, react-error-overlay, react-scripts
  • Other
  • react-scripts
  • react-dev-utils
    • #5150 Run behavioral smoke tests with Jest, add output tests (@Timer)
    • #4514 Make Sass missing message friendlier (@Timer)
    • #4138 Allow ModuleScopePlugin accecpts an array as its appSrc (@froyog)
    • #4016 (chore): Alphabetize and clean files-array in react-dev-utils package.json (@petetnt)
  • babel-preset-react-app, react-error-overlay, react-scripts
  • babel-preset-react-app
    • #5119 Clean up @babel/plugin-transform-regenerator (@lixiaoyan)
    • #5033 Lock babel configuration back to IE 9 support (ES5) (@Timer)
  • react-dev-utils, react-scripts
  • babel-preset-react-app, create-react-app, react-dev-utils, react-error-overlay, react-scripts
  • react-error-overlay, react-scripts
  • babel-plugin-named-asset-import, babel-preset-react-app, react-dev-utils, react-error-overlay, react-scripts
  • confusing-browser-globals, react-dev-utils, react-error-overlay, react-scripts
  • react-dev-utils, react-error-overlay, react-scripts
  • create-react-app
  • react-error-overlay
  • confusing-browser-globals, eslint-config-react-app
  • eslint-config-react-app, react-scripts

Committers: 116

Releases Before 2.x

Please refer to CHANGELOG-1.x.md for earlier versions.