use eslint

+gulpfile.js
\ No newline at end of file

+{
+  "extends": "yoho"
+}
\ No newline at end of file

-{
-    "disallowEmptyBlocks": true,
-    "disallowKeywordsOnNewLine": ["else", "else if"],
-    "disallowKeywords": ["with", "eval"],
-    "disallowMixedSpacesAndTabs": true,
-    "disallowMultipleLineStrings": true,
-    "disallowMultipleSpaces": {"allowEOLComments": true},
-    "disallowNamedUnassignedFunctions": true,
-    "disallowNewlineBeforeBlockStatements": true,
-    "disallowOperatorBeforeLineBreak": ["."],
-    "disallowQuotedKeysInObjects": true,
-    "disallowSpaceAfterObjectKeys": true,
-    "disallowSpaceAfterPrefixUnaryOperators": true,
-    "disallowSpaceBeforeComma": true,
-    "disallowSpaceBeforePostfixUnaryOperators": true,
-    "disallowSpaceBeforeSemicolon": true,
-    "disallowSpacesInCallExpression": true,
-    "disallowSpacesInFunction": {
-        "beforeOpeningRoundBrace": true
-    },
-    "disallowSpacesInsideArrayBrackets": true,
-    "disallowSpacesInsideObjectBrackets": true,
-    "disallowSpacesInsideParentheses": true,
-    "disallowTrailingComma": true,
-    "disallowTrailingWhitespace": true,
-    "maximumLineLength": 120,
-    "requireAnonymousFunctions": {
-        "allExcept": ["declarations"]
-    },
-    "requireBlocksOnNewline": {
-        "includeComments": true
-    },
-    "requireCamelCaseOrUpperCaseIdentifiers": "ignoreProperties",
-    "requireCapitalizedConstructors": true,
-    "requireCommaBeforeLineBreak": true,
-    "requireCurlyBraces": [
-        "if",
-        "else",
-        "for",
-        "while",
-        "do",
-        "try",
-        "catch"
-    ],
-    "requireDollarBeforejQueryAssignment": true,
-    "requireDotNotation": true,
-    "requireLineBreakAfterVariableAssignment": true,
-    "requireObjectKeysOnNewLine": true,
-    "requireOperatorBeforeLineBreak": true,
-    "requirePaddingNewLineAfterVariableDeclaration": true,
-    "requirePaddingNewLinesBeforeLineComments": true,
-    "requirePaddingNewLinesInObjects": true,
-    "requireParenthesesAroundIIFE": true,
-    "requireSpaceAfterBinaryOperators": true,
-    "requireSpaceAfterKeywords": [
-        "do",
-        "for",
-        "if",
-        "else",
-        "switch",
-        "case",
-        "try",
-        "catch",
-        "void",
-        "while",
-        "with",
-        "return",
-        "typeof"
-    ],
-    "requireSpaceBeforeBinaryOperators": true,
-    "requireSpaceBeforeBlockStatements": 1,
-    "requireSpaceBeforeKeywords": [
-        "else",
-        "while",
-        "catch"
-    ],
-    "requireSpaceBeforeObjectValues": true,
-    "requireSpaceBetweenArguments": true,
-    "requireSpacesInAnonymousFunctionExpression": {
-        "beforeOpeningCurlyBrace": true
-    },
-    "requireSpacesInConditionalExpression": {
-        "afterTest": true,
-        "beforeConsequent": true,
-        "afterConsequent": true,
-        "beforeAlternate": true
-    },
-    "requireSpacesInForStatement": true,
-    "requireSpacesInFunction": {
-        "beforeOpeningCurlyBrace": true
-    },
-    "requireVarDeclFirst": true,
-    "validateAlignedFunctionParameters": {
-      "lineBreakAfterOpeningBrace": true,
-      "lineBreakBeforeClosingBrace": true
-    },
-    "validateIndentation": 4,
-    "validateParameterSeparator": ", ",
-
-    "maxErrors": 20
-}

-{
-    "asi": false,
-    "bitwise": false,
-    "boss": false,
-    "browser": true,
-    "couch": false,
-    "curly": true,
-    "debug": false,
-    "devel": true,
-    "dojo": false,
-    "eqeqeq": true,
-    "eqnull": true,
-    "es3": false,
-    "esnext": false,
-    "evil": false,
-    "expr": true,
-    "forin": true,
-    "funcscope": true,
-    "gcl": false,
-    "globalstrict": false,
-    "immed": true,
-    "iterator": false,
-    "jquery": false,
-    "lastsemic": false,
-    "latedef": true,
-    "laxbreak": true,
-    "laxcomma": false,
-    "loopfunc": false,
-    "mootools": false,
-    "moz": false,
-    "multistr": false,
-    "newcap": true,
-    "noarg": true,
-    "node": true,
-    "noempty": false,
-    "nonew": true,
-    "nonstandard": false,
-    "nomen": false,
-    "onecase": false,
-    "onevar": false,
-    "passfail": false,
-    "phantom": false,
-    "plusplus": false,
-    "proto": false,
-    "prototypejs": false,
-    "regexdash": true,
-    "regexp": false,
-    "rhino": false,
-    "scripturl": true,
-    "shadow": false,
-    "shelljs": false,
-    "smarttabs": true,
-    "strict": false,
-    "sub": false,
-    "supernew": false,
-    "trailing": true,
-    "undef": true,
-    "unused": "vars",
-    "validthis": true,
-    "withstmt": false,
-    "white": true,
-    "worker": false,
-    "wsh": false,
-    "yui": false,
-
-    "maxerr": 20,
-    "predef": ["define", "seajs", "wx"],
-    "quotmark": "single"
-}

@@ -3,7 +3,8 @@
   "version": "0.0.0",
   "private": true,
   "scripts": {
-    "start": "node ./bin/www"
+    "start": "node ./bin/www",
+    "lint": "eslint -c .eslintrc --cache public/**/*.js"
   },
   "dependencies": {
     "body-parser": "~1.13.2",
@@ -14,5 +15,10 @@
     "morgan": "~1.6.1",
     "request-promise": "^2.0.1",
     "serve-favicon": "^2.3.0"
+  },
+  "pre-commit": ["lint"],
+  "devDependencies": {
+    "eslint-config-yoho": "^0.1.1",
+    "precommit-hook": "^3.0.0"
   }
 }