2017-06-10: Version 4.0.0

      * Support ES2017 async function and await expression (issue 1079)
      * Support ES2017 trailing commas in function parameters (issue 1550)
      * Explicitly distinguish parsing a module vs a script (issue 1576)
      * Fix JSX non-empty container (issue 1786)
      * Allow JSX element in a yield expression (issue 1765)
      * Allow `in` expression in a concise body with a function body (issue 1793)
      * Setter function argument must not be a rest parameter (issue 1693)
      * Limit strict mode directive to functions with a simple parameter list (issue 1677)
      * Prohibit any escape sequence in a reserved word (issue 1612)
      * Only permit hex digits in hex escape sequence (issue 1619)
      * Prohibit labelled class/generator/function declaration (issue 1484)
      * Limit function declaration as if statement clause only in non-strict mode (issue 1657)
      * Tolerate missing ) in a with and do-while statement (issue 1481)

2016-12-22: Version 3.1.3

      * Support binding patterns as rest element (issue 1681)
      * Account for different possible arguments of a yield expression (issue 1469)

2016-11-24: Version 3.1.2

      * Ensure that import specifier is more restrictive (issue 1615)
      * Fix duplicated JSX tokens (issue 1613)
      * Scan template literal in a JSX expression container (issue 1622)
      * Improve XHTML entity scanning in JSX (issue 1629)

2016-10-31: Version 3.1.1

      * Fix assignment expression problem in an export declaration (issue 1596)
      * Fix incorrect tokenization of hex digits (issue 1605)

2016-10-09: Version 3.1.0

      * Do not implicitly collect comments when comment attachment is specified (issue 1553)
      * Fix incorrect handling of duplicated proto shorthand fields (issue 1485)
      * Prohibit initialization in some variants of for statements (issue 1309, 1561)
      * Fix incorrect parsing of export specifier (issue 1578)
      * Fix ESTree compatibility for assignment pattern (issue 1575)

2016-09-03: Version 3.0.0

      * Support ES2016 exponentiation expression (issue 1490)
      * Support JSX syntax (issue 1467)
      * Use the latest Unicode 8.0 (issue 1475)
      * Add the support for syntax node delegate (issue 1435)
      * Fix ESTree compatibility on meta property (issue 1338)
      * Fix ESTree compatibility on default parameter value (issue 1081)
      * Fix ESTree compatibility on try handler (issue 1030)

2016-08-23: Version 2.7.3

      * Fix tokenizer confusion with a comment (issue 1493, 1516)

2016-02-02: Version 2.7.2

      * Fix out-of-bound error location in an invalid string literal (issue 1457)
      * Fix shorthand object destructuring defaults in variable declarations (issue 1459)

2015-12-10: Version 2.7.1

      * Do not allow trailing comma in a variable declaration (issue 1360)
      * Fix assignment to `let` in non-strict mode (issue 1376)
      * Fix missing delegate property in YieldExpression (issue 1407)

2015-10-22: Version 2.7.0

      * Fix the handling of semicolon in a break statement (issue 1044)
      * Run the test suite with major web browsers (issue 1259, 1317)
      * Allow `let` as an identifier in non-strict mode (issue 1289)
      * Attach orphaned comments as `innerComments` (issue 1328)
      * Add the support for token delegator (issue 1332)

2015-09-01: Version 2.6.0

      * Properly allow or prohibit `let` in a binding identifier/pattern (issue 1048, 1098)
      * Add sourceType field for Program node (issue 1159)
      * Ensure that strict mode reserved word binding throw an error (issue 1171)
      * Run the test suite with Node.js and IE 11 on Windows (issue 1294)
      * Allow binding pattern with no initializer in a for statement (issue 1301)

2015-07-31: Version 2.5.0

      * Run the test suite in a browser environment (issue 1004)
      * Ensure a comma between imported default binding and named imports (issue 1046)
      * Distinguish `yield` as a keyword vs an identifier (issue 1186)
      * Support ES6 meta property `new.target` (issue 1203)
      * Fix the syntax node for yield with expression (issue 1223)
      * Fix the check of duplicated proto in property names (issue 1225)
      * Fix ES6 Unicode escape in identifier name (issue 1229)
      * Support ES6 IdentifierStart and IdentifierPart (issue 1232)
      * Treat await as a reserved word when parsing as a module (issue 1234)
      * Recognize identifier characters from Unicode SMP (issue 1244)
      * Ensure that export and import can be followed by a comma (issue 1250)
      * Fix yield operator precedence (issue 1262)

2015-07-01: Version 2.4.1

      * Fix some cases of comment attachment (issue 1071, 1175)
      * Fix the handling of destructuring in function arguments (issue 1193)
      * Fix invalid ranges in assignment expression (issue 1201)

2015-06-26: Version 2.4.0

      * Support ES6 for-of iteration (issue 1047)
      * Support ES6 spread arguments (issue 1169)
      * Minimize npm payload (issue 1191)

2015-06-16: Version 2.3.0

      * Support ES6 generator (issue 1033)
      * Improve parsing of regular expressions with `u` flag (issue 1179)

2015-04-17: Version 2.2.0

      * Support ES6 import and export declarations (issue 1000)
      * Fix line terminator before arrow not recognized as error (issue 1009)
      * Support ES6 destructuring (issue 1045)
      * Support ES6 template literal (issue 1074)
      * Fix the handling of invalid/incomplete string escape sequences (issue 1106)
      * Fix ES3 static member access restriction (issue 1120)
      * Support for `super` in ES6 class (issue 1147)

2015-03-09: Version 2.1.0

      * Support ES6 class (issue 1001)
      * Support ES6 rest parameter (issue 1011)
      * Expand the location of property getter, setter, and methods (issue 1029)
      * Enable TryStatement transition to a single handler (issue 1031)
      * Support ES6 computed property name (issue 1037)
      * Tolerate unclosed block comment (issue 1041)
      * Support ES6 lexical declaration (issue 1065)

2015-02-06: Version 2.0.0

      * Support ES6 arrow function (issue 517)
      * Support ES6 Unicode code point escape (issue 521)
      * Improve the speed and accuracy of comment attachment (issue 522)
      * Support ES6 default parameter (issue 519)
      * Support ES6 regular expression flags (issue 557)
      * Fix scanning of implicit octal literals (issue 565)
      * Fix the handling of automatic semicolon insertion (issue 574)
      * Support ES6 method definition (issue 620)
      * Support ES6 octal integer literal (issue 621)
      * Support ES6 binary integer literal (issue 622)
      * Support ES6 object literal property value shorthand (issue 624)

2015-03-03: Version 1.2.5

      * Fix scanning of implicit octal literals (issue 565)

2015-02-05: Version 1.2.4

      * Fix parsing of LeftHandSideExpression in ForInStatement (issue 560)
      * Fix the handling of automatic semicolon insertion (issue 574)

2015-01-18: Version 1.2.3

      * Fix division by this (issue 616)

2014-05-18: Version 1.2.2

      * Fix duplicated tokens when collecting comments (issue 537)

2014-05-04: Version 1.2.1

      * Ensure that Program node may still have leading comments (issue 536)

2014-04-29: Version 1.2.0

      * Fix semicolon handling for expression statement (issue 462, 533)
      * Disallow escaped characters in regular expression flags (issue 503)
      * Performance improvement for location tracking (issue 520)
      * Improve the speed of comment attachment (issue 522)

2014-03-26: Version 1.1.1

      * Fix token handling of forward slash after an array literal (issue 512)

2014-03-23: Version 1.1.0

      * Optionally attach comments to the owning syntax nodes (issue 197)
      * Simplify binary parsing with stack-based shift reduce (issue 352)
      * Always include the raw source of literals (issue 376)
      * Add optional input source information (issue 386)
      * Tokenizer API for pure lexical scanning (issue 398)
      * Improve the web site and its online demos (issue 337, 400, 404)
      * Performance improvement for location tracking (issue 417, 424)
      * Support HTML comment syntax (issue 451)
      * Drop support for legacy browsers (issue 474)

2013-08-27: Version 1.0.4

      * Minimize the payload for packages (issue 362)
      * Fix missing cases on an empty switch statement (issue 436)
      * Support escaped ] in regexp literal character classes (issue 442)
      * Tolerate invalid left-hand side expression (issue 130)

2013-05-17: Version 1.0.3

      * Variable declaration needs at least one declarator (issue 391)
      * Fix benchmark's variance unit conversion (issue 397)
      * IE < 9: \v should be treated as vertical tab (issue 405)
      * Unary expressions should always have prefix: true (issue 418)
      * Catch clause should only accept an identifier (issue 423)
      * Tolerate setters without parameter (issue 426)

2012-11-02: Version 1.0.2

    Improvement:

      * Fix esvalidate JUnit output upon a syntax error (issue 374)

2012-10-28: Version 1.0.1

    Improvements:

      * esvalidate understands shebang in a Unix shell script (issue 361)
      * esvalidate treats fatal parsing failure as an error (issue 361)
      * Reduce Node.js package via .npmignore (issue 362)

2012-10-22: Version 1.0.0

    Initial release.