My JSCS style configuration.

jscs.json

{

  "maximumLineLength": 80,

  "validateJSDoc": {
    "checkParamNames": true,
    "checkRedundantParams": true,
    "requireParamTypes": true
  },

  "validateLineBreaks": "LF",
  "validateQuoteMarks": true,
  "validateIndentation": 2,

  "requireCurlyBraces": [
    "if",
    "else",
    "for",
    "while",
    "do",
    "try",
    "catch"
  ],

  "requireSpaceAfterKeywords": [
    "if",
    "else",
    "for",
    "while",
    "do",
    "switch",
    "return",
    "try",
    "catch"
  ],

  "requireOperatorBeforeLineBreak": [
    "?",
    "+",
    "-",
    "/",
    "*",
    "=",
    "==",
    "===",
    "!=",
    "!==",
    ">",
    ">=",
    "<",
    "<="
  ],

  "requireSpaceBeforeBinaryOperators": [
    "+",
    "-",
    "/",
    "*",
    "=",
    "==",
    "===",
    "!=",
    "!=="
  ],

  "requireSpaceAfterBinaryOperators": [
    "+",
    "-",
    "/",
    "*",
    "=",
    "==",
    "===",
    "!=",
    "!=="
  ],

  "requireRightStickedOperators": [
    "!"
  ],

  "requireLeftStickedOperators": [
    ","
  ],

  "requireKeywordsOnNewLine": [
    "else",
    "catch",
    "while"
  ],

  "requireSpacesInFunctionExpression": {
    "beforeOpeningCurlyBrace": true
  },

  "requireParenthesesAroundIIFE": true,
  "requireCommaBeforeLineBreak": true,
  "requireCamelCaseOrUpperCaseIdentifiers": true,
  "requireCapitalizedConstructors": true,
  "requireDotNotation": true,

  "disallowLeftStickedOperators": [
    "?",
    "+",
    "-",
    "/",
    "*",
    "=",
    "==",
    "===",
    "!=",
    "!==",
    ">",
    ">=",
    "<",
    "<="
  ],

  "disallowSpaceAfterPrefixUnaryOperators": [
    "++",
    "--",
    "+",
    "-",
    "~",
    "!"
  ],

  "disallowRightStickedOperators": [
    "?",
    "+",
    "/",
    "*",
    ":",
    "=",
    "==",
    "===",
    "!=",
    "!==",
    ">",
    ">=",
    "<",
    "<="
  ],

  "disallowSpaceBeforePostfixUnaryOperators": [
    "++",
    "--"
  ],

  "disallowImplicitTypeConversion": [
    "numeric",
    "boolean",
    "binary",
    "string"
  ],

  "disallowKeywords": [
    "with"
  ],

  "disallowMultipleLineStrings": true,
  "disallowMultipleLineBreaks": true,
  "disallowEmptyBlocks": true,
  "disallowSpacesInsideArrayBrackets": true,
  "disallowSpacesInsideParentheses": true,
  "disallowQuotedKeysInObjects": true,
  "disallowSpaceAfterObjectKeys": true,
  "disallowTrailingWhitespace": true,
  "disallowMixedSpacesAndTabs": "smart"

}

@michael-benin-CN it's not checking your code for errors so much as checking it for stylistic problems. It's specifically finding style inconsistencies.

Doesn't JSHint solve that?

I guess what I'm asking is what can this library do that JSHint can't, or what it does better.

After talking to a coworker, apparently JSHint is removing a lot of functionality, and that is being replaced by this.

@michael-benin-CN just check out the options compared to JSHint. JSCS handles things like braces on different lines, IIFE style, jsdoc style, etc. These aren't things that JSHint can handle as it works with an AST.