2018-06-17: Version 4.0.1

* Fix parsing async get/set in a class (issue 1861, 1875)

* Account for different return statement argument (issue 1829, 1897, 1928)

* Correct the handling of HTML comment when parsing a module (issue 1841)

* Fix incorrect parse async with proto-identifier-shorthand (issue 1847)

* Fix negative column in binary expression (issue 1844)

* Fix incorrect YieldExpression in object methods (issue 1834)

* Various documentation fixes

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.