[Breaking] drop node < 4 support

.eslintrc

@@ -2,13 +2,12 @@
     "env": {
         "node": true
     },
+    parserOptions: {
+      ecmaVersion: 2015
+    },
     ecmaFeatures: {
         jsx: true
     },
-    "globals": {
-    },
-    "plugins": [
-    ],
     "rules": {
         // Possible Errors
         "comma-dangle": [2, "never"],
@@ -62,7 +61,7 @@
         "no-lone-blocks": 2,
         "no-loop-func": 2,
         "no-multi-spaces": 2,
-        "no-multi-str": 0,
+        "no-multi-str": 2,
         "no-native-reassign": 2,
         "no-new": 2,
         "no-new-func": 2,
@@ -149,10 +148,16 @@
         "wrap-regex": 0,
         // Legacy
         "max-depth": 0,
-        "max-len": [2, 120],
+        "max-len": [2, 120, {
+          "ignoreStrings": true,
+          "ignoreTemplateLiterals": true,
+          "ignoreComments": true,
+        }],
         "max-params": 0,
         "max-statements": 0,
         "no-plusplus": 0,
-        "no-prototype-builtins": 2
+        "no-prototype-builtins": 2,
+        "prefer-template": 2,
+        "template-curly-spacing": [2, "never"]
     }
 }

.travis.yml

@@ -1,14 +1,11 @@
+sudo: false
 language: node_js
 node_js:
   - '7'
   - '6'
   - '5'
   - '4'
-  - 'iojs'
-  - '0.12'
-  - '0.10'
 before_script:
-  - 'if [ "${TRAVIS_NODE_VERSION}" = "iojs" ] || [ "${TRAVIS_NODE_VERSION}" = "0.12" ] || [ "${TRAVIS_NODE_VERSION}" = "0.10" ]; then npm install eslint@2 babel-eslint@6; fi'
 after_success:
   - npm run coveralls
 matrix:

appveyor.yml

@@ -3,6 +3,7 @@ environment:
     - nodejs_version: '4'
     - nodejs_version: '5'
     - nodejs_version: '6'
+    - nodejs_version: '7'
 install:
   - ps: Install-Product node $env:nodejs_version
   - set CI=true

docs/rules/forbid-elements.md

@@ -16,12 +16,12 @@ This rule checks all JSX elements and `React.createElement` calls and verifies t
 
 ### `forbid`
 
-An array of strings and/or objects. An object in this array may have the following properties: 
+An array of strings and/or objects. An object in this array may have the following properties:
 
 * `element` (required): the name of the forbidden element (e.g. `'button'`, `'Modal'`)
 * `message`: additional message that gets reported
 
-A string item in the array is a shorthand for `{ element: string }`. 
+A string item in the array is a shorthand for `{ element: string }`.
 
 The following patterns are not considered warnings:
 
@@ -50,7 +50,7 @@ React.createElement(Namespaced.Element);
 
 // [1, { "forbid": [{ "element": "button", "message": "use <Button> instead" }, "input"] }]
 <div><button /><input /></div>
-React.createElement('div', {}, React.createElemet('button', {}, React.createElement('input')));
+React.createElement('div', {}, React.createElement('button', {}, React.createElement('input')));
 ```
 
 ## When not to use

index.js

@@ -83,7 +83,7 @@ function configureAsError(rules) {
     if (!has(rules, key)) {
       continue;
     }
-    result['react/' + key] = 2;
+    result[`react/${key}`] = 2;
   }
   return result;
 }

lib/rules/forbid-component-props.js

@@ -61,7 +61,7 @@ module.exports = {
 
         context.report({
           node: node,
-          message: 'Prop `' + prop + '` is forbidden on Components'
+          message: `Prop \`${prop}\` is forbidden on Components`
         });
       }
     };

lib/rules/forbid-elements.js

@@ -59,11 +59,11 @@ module.exports = {
     });
 
     function errorMessageForElement(name) {
-      var message = '<' + name + '> is forbidden';
+      var message = `<${name}> is forbidden`;
       var additionalMessage = indexedForbidConfigs[name].message;
 
       if (additionalMessage) {
-        message = message + ', ' + additionalMessage;
+        return `${message}, ${additionalMessage}`;
       }
 
       return message;

lib/rules/forbid-foreign-prop-types.js

@@ -4,8 +4,6 @@
  */
 'use strict';
 
-var find = require('array.prototype.find');
-
 // ------------------------------------------------------------------------------
 // Constants
 // ------------------------------------------------------------------------------
@@ -47,7 +45,7 @@ module.exports = {
       },
 
       ObjectPattern: function(node) {
-        var propTypesNode = find(node.properties, function(property) {
+        var propTypesNode = node.properties.find(function(property) {
           return property.type === 'Property' && property.key.name === 'propTypes';
         });
 

lib/rules/forbid-prop-types.js

@@ -102,7 +102,7 @@ module.exports = {
         if (isForbidden(target)) {
           context.report({
             node: declaration,
-            message: 'Prop type `' + target + '` is forbidden'
+            message: `Prop type \`${target}\` is forbidden`
           });
         }
       });

lib/rules/jsx-closing-bracket-location.js

@@ -248,8 +248,7 @@ module.exports = {
         if (correctColumn !== null) {
           expectedNextLine = tokens.lastProp &&
             (tokens.lastProp.lastLine === tokens.closing.line);
-          data.details = ' (expected column ' + (correctColumn + 1) +
-            (expectedNextLine ? ' on the next line)' : ')');
+          data.details = ` (expected column ${correctColumn + 1}${expectedNextLine ? ' on the next line)' : ')'}`;
         }
 
         context.report({
@@ -274,7 +273,7 @@ module.exports = {
               case 'tag-aligned':
               case 'line-aligned':
                 return fixer.replaceTextRange([cachedLastAttributeEndPos, node.end],
-                  '\n' + getIndentation(tokens, expectedLocation, correctColumn) + closingTag);
+                  `\n${getIndentation(tokens, expectedLocation, correctColumn)}${closingTag}`);
               default:
                 return true;
             }

lib/rules/jsx-curly-spacing.js

@@ -83,7 +83,7 @@ module.exports = {
       context.report({
         node: node,
         loc: token.loc.start,
-        message: 'There should be no newline after \'' + token.value + '\'',
+        message: `There should be no newline after '${token.value}'`,
         fix: function(fixer) {
           var nextToken = sourceCode.getTokenAfter(token);
           return fixer.replaceTextRange([token.range[1], nextToken.range[0]], spaced ? ' ' : '');
@@ -101,7 +101,7 @@ module.exports = {
       context.report({
         node: node,
         loc: token.loc.start,
-        message: 'There should be no newline before \'' + token.value + '\'',
+        message: `There should be no newline before '${token.value}'`,
         fix: function(fixer) {
           var previousToken = sourceCode.getTokenBefore(token);
           return fixer.replaceTextRange([previousToken.range[1], token.range[0]], spaced ? ' ' : '');
@@ -119,7 +119,7 @@ module.exports = {
       context.report({
         node: node,
         loc: token.loc.start,
-        message: 'There should be no space after \'' + token.value + '\'',
+        message: `There should be no space after '${token.value}'`,
         fix: function(fixer) {
           var nextToken = sourceCode.getTokenAfter(token);
           var leadingComments = sourceCode.getNodeByRangeIndex(nextToken.range[0]).leadingComments;
@@ -139,7 +139,7 @@ module.exports = {
       context.report({
         node: node,
         loc: token.loc.start,
-        message: 'There should be no space before \'' + token.value + '\'',
+        message: `There should be no space before '${token.value}'`,
         fix: function(fixer) {
           var previousToken = sourceCode.getTokenBefore(token);
           var trailingComments = sourceCode.getNodeByRangeIndex(previousToken.range[0]).trailingComments;
@@ -159,7 +159,7 @@ module.exports = {
       context.report({
         node: node,
         loc: token.loc.start,
-        message: 'A space is required after \'' + token.value + '\'',
+        message: `A space is required after '${token.value}'`,
         fix: function(fixer) {
           return fixer.insertTextAfter(token, ' ');
         }
@@ -176,7 +176,7 @@ module.exports = {
       context.report({
         node: node,
         loc: token.loc.start,
-        message: 'A space is required before \'' + token.value + '\'',
+        message: `A space is required before '${token.value}'`,
         fix: function(fixer) {
           return fixer.insertTextBefore(token, ' ');
         }

lib/rules/jsx-filename-extension.js

@@ -85,7 +85,7 @@ module.exports = {
 
         context.report({
           node: invalidNode,
-          message: 'JSX not allowed in files with extension \'' + invalidExtension + '\''
+          message: `JSX not allowed in files with extension '${invalidExtension}'`
         });
       }
     };

lib/rules/jsx-handler-names.js

@@ -37,9 +37,8 @@ module.exports = {
     var eventHandlerPrefix = configuration.eventHandlerPrefix || 'handle';
     var eventHandlerPropPrefix = configuration.eventHandlerPropPrefix || 'on';
 
-    var EVENT_HANDLER_REGEX = new RegExp('^((props\\.' + eventHandlerPropPrefix + ')'
-                                        + '|((.*\\.)?' + eventHandlerPrefix + '))[A-Z].*$');
-    var PROP_EVENT_HANDLER_REGEX = new RegExp('^(' + eventHandlerPropPrefix + '[A-Z].*|ref)$');
+    var EVENT_HANDLER_REGEX = new RegExp(`^((props\\.${eventHandlerPropPrefix})|((.*\\.)?${eventHandlerPrefix}))[A-Z].*$`);
+    var PROP_EVENT_HANDLER_REGEX = new RegExp(`^(${eventHandlerPropPrefix}[A-Z].*|ref)$`);
 
     return {
       JSXAttribute: function(node) {
@@ -60,12 +59,12 @@ module.exports = {
         if (propIsEventHandler && !propFnIsNamedCorrectly) {
           context.report({
             node: node,
-            message: 'Handler function for ' + propKey + ' prop key must begin with \'' + eventHandlerPrefix + '\''
+            message: `Handler function for ${propKey} prop key must begin with '${eventHandlerPrefix}'`
           });
         } else if (propFnIsNamedCorrectly && !propIsEventHandler) {
           context.report({
             node: node,
-            message: 'Prop key for ' + propValue + ' must begin with \'' + eventHandlerPropPrefix + '\''
+            message: `Prop key for ${propValue} must begin with '${eventHandlerPropPrefix}'`
           });
         }
       }

lib/rules/jsx-indent-props.js

@@ -128,9 +128,9 @@ module.exports = {
 
       var regExp;
       if (indentType === 'space') {
-        regExp = new RegExp('^[ ' + skip + ']+');
+        regExp = new RegExp(`^[ ${skip}]+`);
       } else {
-        regExp = new RegExp('^[\t' + skip + ']+');
+        regExp = new RegExp(`^[\t${skip}]+`);
       }
 
       var indent = regExp.exec(src);

lib/rules/jsx-indent.js

@@ -144,9 +144,9 @@ module.exports = {
 
       var regExp;
       if (indentType === 'space') {
-        regExp = new RegExp('^[ ' + skip + ']+');
+        regExp = new RegExp(`^[ ${skip}]+`);
       } else {
-        regExp = new RegExp('^[\t' + skip + ']+');
+        regExp = new RegExp(`^[\t${skip}]+`);
       }
 
       var indent = regExp.exec(src);

lib/rules/jsx-max-props-per-line.js

@@ -73,7 +73,7 @@ module.exports = {
             var name = getPropName(propsInLine[maximum]);
             context.report({
               node: propsInLine[maximum],
-              message: 'Prop `' + name + '` must be placed on a new line'
+              message: `Prop \`${name}\` must be placed on a new line`
             });
           }
         });

lib/rules/jsx-no-undef.js

@@ -67,7 +67,7 @@ module.exports = {
 
       context.report({
         node: node,
-        message: '\'' + node.name + '\' is not defined.'
+        message: `'${node.name}' is not defined.`
       });
     }
 

lib/rules/jsx-pascal-case.js

@@ -66,7 +66,7 @@ module.exports = {
         if (!isPascalCase && !isCompatTag && !isAllowedAllCaps && !isIgnored) {
           context.report({
             node: node,
-            message: 'Imported JSX component ' + name + ' must be in PascalCase'
+            message: `Imported JSX component ${name} must be in PascalCase`
           });
         }
       }

lib/rules/jsx-wrap-multilines.js

@@ -73,7 +73,7 @@ module.exports = {
           node: node,
           message: 'Missing parentheses around multilines JSX',
           fix: function(fixer) {
-            return fixer.replaceText(node, '(' + sourceCode.getText(node) + ')');
+            return fixer.replaceText(node, `(${sourceCode.getText(node)})`);
           }
         });
       }

lib/rules/no-children-prop.js

@@ -4,8 +4,6 @@
  */
 'use strict';
 
-var find = require('array.prototype.find');
-
 // ------------------------------------------------------------------------------
 // Helpers
 // ------------------------------------------------------------------------------
@@ -55,7 +53,7 @@ module.exports = {
         }
 
         var props = node.arguments[1].properties;
-        var childrenProp = find(props, function(prop) {
+        var childrenProp = props.find(function(prop) {
           return prop.key && prop.key.name === 'children';
         });
 

lib/rules/no-danger-with-children.js

@@ -4,7 +4,6 @@
  */
 'use strict';
 
-var find = require('array.prototype.find');
 var variableUtil = require('../util/variable');
 
 // ------------------------------------------------------------------------------
@@ -21,7 +20,7 @@ module.exports = {
   },
   create: function(context) {
     function findSpreadVariable(name) {
-      return find(variableUtil.variablesInScope(context), function (item) {
+      return variableUtil.variablesInScope(context).find(function (item) {
         return item.name === name;
       });
     }
@@ -34,7 +33,7 @@ module.exports = {
       if (!node.properties) {
         return false;
       }
-      return find(node.properties, function(prop) {
+      return node.properties.find(function(prop) {
         if (prop.type === 'Property') {
           return prop.key.name === propName;
         } else if (prop.type === 'ExperimentalSpreadProperty') {
@@ -54,7 +53,7 @@ module.exports = {
      */
     function findJsxProp(node, propName) {
       var attributes = node.openingElement.attributes;
-      return find(attributes, function (attribute) {
+      return attributes.find(function (attribute) {
         if (attribute.type === 'JSXSpreadAttribute') {
           var variable = findSpreadVariable(attribute.argument.name);
           if (variable && variable.defs.length && variable.defs[0].node.init) {
@@ -95,7 +94,7 @@ module.exports = {
           var props = node.arguments[1];
 
           if (props.type === 'Identifier') {
-            var variable = find(variableUtil.variablesInScope(context), function (item) {
+            var variable = variableUtil.variablesInScope(context).find(function (item) {
               return item.name === props.name;
             });
             if (variable && variable.defs[0].node.init) {