tools: enable prefer-const eslint rule

Description from: http://eslint.org/docs/rules/prefer-const.html If a variable is never modified, using the `const` declaration is better. `const` declaration tells readers, "this variable is never modified," reducing cognitive load and improving maintainability. Refer: nodejs#3118 PR-URL: nodejs#3152 Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Сковорода Никита Андреевич <[email protected]> Reviewed-By: Roman Reiss <[email protected]> Reviewed-By: Michaël Zasso <[email protected]>
rvagg · Oct 29, 2015 · 701e38c · 701e38c
1 parent 1929d5b
commit 701e38c
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/.eslintrc b/.eslintrc
@@ -70,6 +70,11 @@ rules:
   # require space after keywords, eg 'for (..)'
   space-after-keywords: 2
 
+  # ECMAScript 6
+  # list: http://eslint.org/docs/rules/#ecmascript-6
+  ## Suggest using 'const' wherever possible
+  prefer-const: 2
+
   # Strict Mode
   # list: https://github.com/eslint/eslint/tree/master/docs/rules#strict-mode
   ## 'use strict' on top