4.0.11 (2017-02-07)¶ ↑
Bug fixes¶ ↑
Allow all forms of member expressions to be parenthesized as lvalue.
4.0.10 (2017-02-07)¶ ↑
Bug fixes¶ ↑
Don't expect semicolons after default-exported functions or classes, even when they are expressions.
Check for use of 'use strict'
directives in non-simple parameter functions, even when already in strict mode.
4.0.9 (2017-02-06)¶ ↑
Bug fixes¶ ↑
Fix incorrect error raised for parenthesized simple assignment targets, so that (x) = 1
parses again.
4.0.8 (2017-02-03)¶ ↑
Bug fixes¶ ↑
Solve spurious parenthesized pattern errors by temporarily erring on the side of accepting programs that our delayed errors don't handle correctly yet.
4.0.7 (2017-02-02)¶ ↑
Bug fixes¶ ↑
Accept invalidly rejected code like (x).y = 2
again.
Don't raise an error when a function inside strict code has a non-simple parameter list.
4.0.6 (2017-02-02)¶ ↑
Bug fixes¶ ↑
Fix exponential behavior (manifesting itself as a complete hang for even relatively small source files) introduced by the new 'use strict' check.
4.0.5 (2017-02-02)¶ ↑
Bug fixes¶ ↑
Disallow parenthesized pattern expressions.
Allow keywords as export names.
Don't allow the async
keyword to be parenthesized.
Properly raise an error when a keyword contains a character escape.
Allow "use strict"
to appear after other string literal expressions.
Disallow labeled declarations.
4.0.4 (2016-12-19)¶ ↑
Bug fixes¶ ↑
Fix issue with loading acorn_loose.js with an AMD loader.
Fix crash when export
was followed by a keyword that can't be exported.
4.0.3 (2016-08-16)¶ ↑
Bug fixes¶ ↑
Allow regular function declarations inside single-statement if
branches in loose mode. Forbid them entirely in strict mode.
Properly parse properties named async
in ES2017 mode.
Fix bug where reserved words were broken in ES2017 mode.
4.0.2 (2016-08-11)¶ ↑
Bug fixes¶ ↑
Don't ignore period or 'e' characters after octal numbers.
Fix broken parsing for call expressions in default parameter values of arrow functions.
4.0.1 (2016-08-08)¶ ↑
Bug fixes¶ ↑
Fix false positives in duplicated export name errors.
4.0.0 (2016-08-07)¶ ↑
Breaking changes¶ ↑
The default ecmaVersion
option value is now 7.
A number of internal method signatures changed, so plugins might need to be updated.
Bug fixes¶ ↑
The parser now raises errors on duplicated export names.
arguments
and eval
can now be used in shorthand properties.
Duplicate parameter names in non-simple argument lists now always produce an error.
New features¶ ↑
The ecmaVersion
option now also accepts year-style version numbers (2015, etc).
Support for async
/await
syntax when ecmaVersion
is >= 8.
Support for trailing commas in call expressions when ecmaVersion
is >= 8.
3.3.0 (2016-07-25)¶ ↑
Bug fixes¶ ↑
Fix bug in tokenizing of regexp operator after a function declaration.
Fix parser crash when parsing an array pattern with a hole.
New features¶ ↑
Implement check against complex argument lists in functions that enable strict mode in ES7.
3.2.0 (2016-06-07)¶ ↑
Bug fixes¶ ↑
Improve handling of lack of unicode regexp support in host environment.
Properly reject shorthand properties whose name is a keyword.
Don't crash when the loose parser is called without options object.
New features¶ ↑
Visitors created with visit.make
now have their base as prototype, rather than copying properties into a fresh object.
Make it possible to use visit.ancestor
with a walk state.
3.1.0 (2016-04-18)¶ ↑
Bug fixes¶ ↑
Fix issue where the loose parser created invalid TemplateElement nodes for unclosed template literals.
Properly tokenize the division operator directly after a function expression.
Allow trailing comma in destructuring arrays.
New features¶ ↑
The walker now allows defining handlers for CatchClause
nodes.
3.0.4 (2016-02-25)¶ ↑
Fixes¶ ↑
Allow update expressions as left-hand-side of the ES7 exponential operator.
3.0.2 (2016-02-10)¶ ↑
Fixes¶ ↑
Fix bug that accidentally made undefined
a reserved word when parsing ES7.
3.0.0 (2016-02-10)¶ ↑
Breaking changes¶ ↑
The default value of the ecmaVersion
option is now 6 (used to be 5).
Support for comprehension syntax (which was dropped from the draft spec) has been removed.
Fixes¶ ↑
let
and yield
are now “contextual keywords”, meaning you can mostly use them as identifiers in ES5 non-strict code.
A parenthesized class or function expression after export default
is now parsed correctly.
New features¶ ↑
When ecmaVersion
is set to 7, Acorn will parse the exponentiation operator (**
).
The identifier character ranges are now based on Unicode 8.0.0.
Plugins can now override the raiseRecoverable
method to override the way non-critical errors are handled.
2.7.0 (2016-01-04)¶ ↑
Fixes¶ ↑
Stop allowing rest parameters in setters.
Make sure the loose parser always attaches a local
property to ImportNamespaceSpecifier
nodes.
Disallow y
rexexp flag in ES5.
Disallow \00
and \000
escapes in strict mode.
Raise an error when an import name is a reserved word.
2.6.4 (2015-11-12)¶ ↑
Fixes¶ ↑
Fix crash in loose parser when parsing invalid object pattern.
New features¶ ↑
Support plugins in the loose parser.
2.6.2 (2015-11-10)¶ ↑
Fixes¶ ↑
Don't crash when no options object is passed.
2.6.0 (2015-11-09)¶ ↑
Fixes¶ ↑
Add await
as a reserved word in module sources.
Disallow yield
in a parameter default value for a generator.
Forbid using a comma after a rest pattern in an array destructuring.
New features¶ ↑
Support parsing stdin in command-line tool.
2.5.2 (2015-10-27)¶ ↑
Fixes¶ ↑
Fix bug where the walker walked an exported let
statement as an expression.
2.5.0 (2015-10-27)¶ ↑
Fixes¶ ↑
Fix tokenizer support in the command-line tool.
In the loose parser, don't allow non-string-literals as import sources.
Stop allowing new.target
outside of functions.
Remove legacy guard
and guardedHandler
properties from try nodes.
Stop allowing multiple __proto__
properties on an object literal in strict mode.
Don't allow rest parameters to be non-identifier patterns.
Check for duplicate paramter names in arrow functions.