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jscs v2.6.0 Release Notes

  • 🚚 Thanks to @seanpdoyle, we're able to move some of the ES6 rules from ember-suave to JSCS!

    🆕 New Rules

    disallowVar (Sean Doyle)

    Disallows declaring variables with var.

    "disallowVar": true

    // Valid
let foo;
const bar = 1;

    // Invalid
var baz;

    You can also use "disallowKeywords": ["var"]

    requireArrayDestructuring (Sean Doyle)

    Requires that variable assignment from array values are destructured.

    "requireArrayDestructuring": true

    // Valid
var colors = ['red', 'green', 'blue'];
var [ red ] = colors;

    // Invalid
var colors = ['red', 'green', 'blue'];
var red = colors[0];
    requireEnhancedObjectLiterals (Sean Doyle)

    Requires declaring objects via ES6 enhanced object literals (shorthand versions of properties)

    "requireEnhancedObjectLiterals": true

    var obj = {
  foo() { },
  bar
};

    var obj = {
  foo: function() { },
  bar: bar
};
    requireObjectDestructuring (Sean Doyle)

    Requires variable declarations from objects via destructuring

    "requireObjectDestructuring": true

    // Valid
var { foo } = SomeThing;
var { bar } = SomeThing.foo;

    // Invalid
var foo = SomeThing.foo;
var bar = SomeThing.foo.bar;
    disallowSpacesInGenerator (Francisc Romano)

    Checks the spacing around the * in a generator function.

    "disallowSpacesInGenerator": {
    "beforeStar": true,
    "afterStar": true
}

    var x = function*() {};
function*a() {};
var x = async function*() {};

    🆕 New Rule Options

    • requireCamelCaseOrUpperCaseIdentifiers: add strict option (Jan-Pieter Zoutewelle)

    Also forces the first character to not be capitalized.

    "requireCamelCaseOrUpperCaseIdentifiers": {
  "strict": true
}

    // Valid
var camelCase = 0;
var UPPER_CASE = 4;

// Invalid
var Mixed_case = 2;
var Snake_case = { snake_case: 6 };
var snake_case = { SnakeCase: 6 };
    • 📜 disallowSpace(After|Before)Comma: add allExcept: ['sparseArrays'] (Brian Dixon)
    • validateQuoteMarks: add "ignoreJSX" value (Oleg Gaidarenko)
    • requireMatchingFunctionName: add includeModuleExports option (George Chung)

    🛠 Fixes

    • 📜 Account for sparse arrays in rules with spacing and commas (Brian Dixon)

    • requireSpaceBeforeBinaryOperators: report "operator =" correctly when erroring (Rob Wu)

    • requireAlignedMultilineParams: do not throw on function without body (Oleg Gaidarenko)

    Preset Changes

    • WordPress: add requireBlocksOnNewLines (Gary Jones)