Add new rules from ESLint 3.14

Author: robertrossmann

coding-styles/fixable.js

@@ -144,6 +144,11 @@ module.exports = {
     // requiring the use of parentheses when invoking a constructor via the new keyword.
     'new-parens': 1,
 
+    // Disallow return in else
+    // If an if block contains a return statement, the else block becomes unnecessary. Its contents
+    // can be placed outside of the block.
+    'no-else-return': 1,
+
     // Disallow Extra Boolean Casts
     // In contexts such as an if statement's test where the result of the expression will already be
     // coerced to a Boolean, casting to a Boolean via double negation (!!) is unnecessary.

coding-styles/recommended.js

@@ -103,11 +103,6 @@ module.exports = {
       includeExports: true,
     }],
 
-    // Disallow return in else
-    // If an if block contains a return statement, the else block becomes unnecessary. Its contents
-    // can be placed outside of the block.
-    'no-else-return': 1,
-
     // Disallows comments after code
     // This rule will disallow comments on the same line as code.
     'no-inline-comments': 1,

environments/shared/recommended.js

@@ -535,6 +535,13 @@ module.exports = {
     // to. Additionally, the with statement cannot be used in strict mode.
     'no-with': 2,
 
+    // Require using Error objects as Promise rejection reasons
+    // It is considered good practice to only instances of the built-in Error object for
+    // user-defined errors in Promises. Error objects automatically store a stack trace, which can
+    // be used to debug an error by determining where it came from. If a Promise is rejected with a
+    // non-Error value, it can be difficult to determine where the rejection occurred.
+    'prefer-promise-reject-errors': 2,
+
     // Suggest using the spread operator instead of .apply()
     // This rule is aimed to flag usage of Function.prototype.apply() that can be replaced with the
     // spread operator.

unused.js

@@ -60,6 +60,10 @@ module.exports = {
     // Unused, too restrictive.
     'no-invalid-this': 0,
 
+    // Disallow Use of Chained Assignment Expressions
+    // Unused, seems handy.
+    'no-multi-assign': 0,
+
     // Disallow Multiline Strings
     // Unused, seems handy. This rule should be enabled when pre-ES5 compatibility is required.
     'no-multi-str': 0,