Merge branch 'facebook-master'

* facebook-master: (578 commits)
  Add PR welcoming badge  (facebook#5759)
  Suggest Encore when not building a SPA with Symfony (facebook#5730)
  Merge webpack configuration (facebook#5722)
  Tweak bot settings
  Update stale.yml
  Fix typo (facebook#5727)
  Version bump postcss-preset-env to latest (facebook#5721)
  Updated the link to firebase hosting (facebook#5710)
  Fixed link to manifest.json file (facebook#5704)
  Fix broken documentation link (facebook#5670)
  Fix tsconfig.json lib suggested value (facebook#5701)
  Add permissive TS lib defaults (facebook#5694)
  Lock issues more aggressively
  Make stale bot configuration more aggressive
  ignore intellij module files when generating an app (facebook#4605)
  update envinfo to 5.11.1 (facebook#5685)
  Add bot config (facebook#4483)
  Publish
  Update cached lock file
  Add changelog for 2.1.1
  ...

.eslintignore

@@ -3,3 +3,4 @@ build
 my-app*
 packages/react-scripts/template
 packages/react-scripts/fixtures
+fixtures/

.eslintrc

@@ -7,7 +7,7 @@
     "es6": true
   },
   "parserOptions": {
-    "ecmaVersion": 6
+    "ecmaVersion": 2018
   },
   "rules": {
     "no-console": "off",

.github/ISSUE_TEMPLATE.md

@@ -24,47 +24,56 @@
     You can find webpack docs at https://webpack.js.org/.
 -->
 
-
-### Can you also reproduce the problem with npm 4.x?
+### Did you try recovering your dependencies?
 
 <!--
-  Many errors, especially related to "missing modules", are due to npm bugs.
-  Which version of npm are you running? You can find out by checking:
-
-    npm -v
+  Your module tree might be corrupted, and that might be causing the issues.
+  Let's try to recover it. First, delete these files and folders in your project:
 
-  If it is 5.x, please be aware that it has more than 50 known bugs, and
-  is not guaranteed to work with Create React App.
+    * node_modules
+    * package-lock.json
+    * yarn.lock
 
-  If it's not starting with 4, try to install npm 4.x:
+  Then you need to decide which package manager you prefer to use.
+  We support both npm (https://npmjs.com) and yarn (http://yarnpkg.com/).
+  However, **they can't be used together in one project** so you need to pick one.
+  
+  If you decided to use npm, run this in your project directory:
 
-    npm install -g npm@4
-    cd your_project_directory
-    rm -rf node_modules
-    npm cache clear
+    npm install -g npm@latest
     npm install
 
-  Then try to reproduce the issue again.
-  Can you still reproduce it?
+  This should fix your project.
+  
+  If you decided to use yarn, update it first (https://yarnpkg.com/en/docs/install).
+  Then run in your project directory:
+
+    yarn
 
-  Note: Please try this even if you are using Yarn so that we know whether it's a Yarn-only bug.
+  This should fix your project.
+
+  Importantly, **if you decided to use yarn, you should never run `npm install` in the project**.
+  For example, yarn users should run `yarn add <library>` instead of `npm install <library>`.
+  Otherwise your project will break again.
+
+  Have you done all these steps and still see the issue?
+  Please paste the output of `npm --version` and/or `yarn --version` to confirm.
 -->
 
 (Write your answer here.)
 
-
 ### Which terms did you search for in User Guide?
 
 <!--
   There are a few common documented problems, such as watcher not detecting changes, or build failing.
   They are described in the Troubleshooting section of the User Guide:
 
-  https://github.com/facebookincubator/create-react-app/blob/master/packages/react-scripts/template/README.md#troubleshooting
+  https://github.com/facebook/create-react-app/blob/master/packages/react-scripts/template/README.md#troubleshooting
 
   Please scan these few sections for common problems.
   Additionally, you can search the User Guide itself for something you're having issues with:
   
-  https://github.com/facebookincubator/create-react-app/blob/master/packages/react-scripts/template/README.md
+  https://github.com/facebook/create-react-app/blob/master/packages/react-scripts/template/README.md
   
   If you didn't find the solution, please share which words you searched for.
   This helps us improve documentation for future readers who might encounter the same problem.
@@ -76,19 +85,18 @@
 ### Environment
 
 <!--
-  Please fill in all the relevant fields by running these commands in terminal.
--->
+  To help identify if a problem is specific to a platform, browser, or module version, information about your environment is required.
+  This enables the maintainers quickly reproduce the issue and give feedback.
 
-1. `node -v`: 
-2. `npm -v`:
-3. `yarn --version` (if you use Yarn):
-4. `npm ls react-scripts` (if you haven’t ejected): 
+  Run the following command in your React app's folder in terminal.
+  Note: The result is copied to your clipboard directly.
 
-Then, specify:
+  `npx create-react-app --info`
 
-1. Operating system:
-2. Browser and version (if relevant):
+  Paste the output of the command in the section below.
+-->
 
+(paste the output of the command here)
 
 ### Steps to Reproduce
 

.github/lock.yml

@@ -0,0 +1,8 @@
+# Configuration for lock-threads - https://github.com/dessant/lock-threads
+
+# Number of days of inactivity before a closed issue or pull request is locked
+daysUntilLock: 5
+
+# Do not comment when locking
+setLockReason: false
+lockComment: false

.github/stale.yml

@@ -0,0 +1,49 @@
+# Configuration for probot-stale - https://github.com/probot/stale
+
+# Number of days of inactivity before an Issue or Pull Request becomes stale
+daysUntilStale: 30
+
+# Number of days of inactivity before a stale Issue or Pull Request is closed.
+# Set to false to disable. If disabled, issues still need to be closed manually, but will remain marked as stale.
+daysUntilClose: 5
+
+# Issues or Pull Requests with these labels will never be considered stale. Set to `[]` to disable
+exemptLabels:
+  - "issue: proposal"
+  - "issue: announcement"
+
+# Set to true to ignore issues in a project (defaults to false)
+exemptProjects: true
+
+# Set to true to ignore issues in a milestone (defaults to false)
+exemptMilestones: true
+
+# Label to use when marking as stale
+staleLabel: stale
+
+# Limit the number of actions per hour, from 1-30. Default is 30
+limitPerRun: 30
+
+issues:
+  # Comment to post when marking Issues as stale.
+  markComment: >
+    This issue has been automatically marked as stale because it has not had any
+    recent activity. It will be closed in 5 days if no further activity occurs.
+
+  # Comment to post when closing a stale Issue.
+  closeComment: >
+    This issue has been automatically closed because it has not had any recent
+    activity. If you have a question or comment, please open a new issue.
+
+pulls:
+  # Comment to post when marking Pull Request as stale.
+  markComment: >
+    This pull request has been automatically marked as stale because it has not
+    had any recent activity. It will be closed in 5 days if no further activity
+    occurs.
+
+  # Comment to post when closing a stale Pull Request.
+  closeComment: >
+    This pull request has been automatically closed because it has not had any
+    recent activity. If you have a question or comment, please open a new
+    issue. Thank you for your contribution!

.gitignore

@@ -11,3 +11,4 @@ npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
 /.changelog
+.npm/

.prettierrc

@@ -0,0 +1,5 @@
+{
+  "trailingComma": "es5",
+  "singleQuote": true,
+  "semi": true
+}

.travis.yml

@@ -3,26 +3,33 @@ dist: trusty
 language: node_js
 node_js:
   - 8
-  - 9
+  - 10
 cache:
+  yarn: true
   directories:
-  - node_modules
-  - packages/create-react-app/node_modules
-  - packages/react-scripts/node_modules
+    - .npm
+before_install:
+  - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --nightly
+  - export PATH="$HOME/.yarn/bin:$PATH"
 install: true
 script:
- - 'if [ $TEST_SUITE = "simple" ]; then tasks/e2e-simple.sh; fi'
- - 'if [ $TEST_SUITE = "installs" ]; then tasks/e2e-installs.sh; fi'
- - 'if [ $TEST_SUITE = "kitchensink" ]; then tasks/e2e-kitchensink.sh; fi'
- - 'if [ $TEST_SUITE = "old-node" ]; then tasks/e2e-old-node.sh; fi'
+  - 'if [ $TEST_SUITE = "simple" ]; then tasks/e2e-simple.sh; fi'
+  - 'if [ $TEST_SUITE = "installs" ]; then tasks/e2e-installs.sh; fi'
+  - 'if [ $TEST_SUITE = "kitchensink" ]; then tasks/e2e-kitchensink.sh; fi'
+  - 'if [ $TEST_SUITE = "kitchensink-eject" ]; then tasks/e2e-kitchensink-eject.sh; fi'
+  - 'if [ $TEST_SUITE = "old-node" ]; then tasks/e2e-old-node.sh; fi'
+  - 'if [ $TEST_SUITE = "behavior" ]; then tasks/e2e-behavior.sh; fi'
 env:
   matrix:
     - TEST_SUITE=simple
     - TEST_SUITE=installs
     - TEST_SUITE=kitchensink
+    - TEST_SUITE=kitchensink-eject
+    - TEST_SUITE=behavior
 matrix:
   include:
-    - node_js: 0.10
-      env: TEST_SUITE=old-node
+    - os: osx
+      node_js: 8
+      env: TEST_SUITE=behavior
     - node_js: 6
-      env: TEST_SUITE=kitchensink
+      env: TEST_SUITE=old-node