CHANGELOG.md

3.0.0 (2022-07-17)

Features

• Provide ecmaVersion option to make cloned AST conform to each annual estree spec

  • set default ecmaVersion to 2022

• Introduce espurify.purifyAst as an alias of default function

• Rename all WhiteList to AllowList in favor of more inclusive language

• Support ES2022 grammar

  • support PropertyDefinition
  • support PrivateIdentifier
  • support StaticBlock

• Support ES2020 grammar

  • support ChainExpression
  • support ImportExpression
  • support exported property of ExportAllDeclaration
  • support BigInt literals

Breaking Changes

This release will not affect most users immediately. There are three notable changes.

1. espurify function is still exported as default but deprecated in favor of named exports aiming ESM era, and will be removed in future major releases. Please use espurify.purifyAst instead.

2. espurify.cloneWithWhitelist is still exported but deprecated in favor of more inclusive language and will be removed in future major releases. Please use espurify.cloneWithAllowlist instead.

3. Some new properties will appear in purified AST and may affect deep-equality of the tree, since default ecmaVersion is changed from 2018 to 2022 which add some properties to existing Nodes.

-  CallExpression: ['type', 'callee', 'arguments'],
+  CallExpression: ['type', 'callee', 'arguments', 'optional'],
-  ExportAllDeclaration: ['type', 'source'],
+  ExportAllDeclaration: ['type', 'source', 'exported'],
-  Literal: ['type', 'value', 'regex'],
+  Literal: ['type', 'value', 'regex', 'bigint'],

To make espurify's behavior same as v2, please use espurify.customize function with ecmaVersion: 2018 option.

const purify = espurify.customize({ ecmaVersion: 2018 });
const clonedAst = purify(originalAst);

2.1.1 (2021-03-29)

Bug Fixes

• Revert relase 2.1.0 since it affects to AST matching logic and breaks some usecases.

2.1.0 (2021-03-26)

Features

• Support ES2020 grammar
  • support ChainExpression
  • support ImportExpression
  • support exported property of ExportAllDeclaration
  • support BigInt literals

2.0.1 (2019-02-15)

Bug Fixes

• Fix cloning when the same object instance is referenced from multiple nodes (and introduce structural cloning) by @papandreou

2.0.0 (2018-11-23)

Breaking Changes

• Remove core-js dependency by @goto-bus-stop

We drop support of ancient (= before ES6) environments. Please use polyfills by your own.

• Drop support for prebuilt bundle and bower

We stopped providing prebuilt bundle for browsers. Please build your own by your bundler. We also dropped bower support. Please use npm instead.

1.8.1 (2018-07-10)

Bug Fixes

• Deal with circular references in AST

1.8.0 (2018-05-10)

Features

• Support ES2018 (i.e. async iteration statement: for-await-of)

1.7.0 (2017-02-24)

Features

• Support ES2017 types and properties

1.6.1 (2017-02-13)

Bug Fixes

• fix property order of ConditionalExpression (01c13ada)

1.6.0 (2016-05-25)

Features

• Consolidate ponyfills into core-js

1.5.1 (2016-03-28)

Performance Improvements

• Improve AST clone performance

1.5.0 (2015-12-21)

Features

• prepend type to whitelist if it does not exist (af941315)

1.4.0 (2015-12-18)

Features

• expose cloneWithWhitelist to deal with non-standard AST trees

1.3.0 (2015-06-05)

Features

• add delegate to YieldExpression (8ef733ed)

1.2.0 (2015-04-17)

Features

• performance optimization

1.1.0 (2015-04-12)

Features

• switch to The ESTree Spec to support ES6 (b9ca486e)

Bug Fixes

• avoid cloning private (maybe recursive) props (501b12bf)

1.0.1 (2015-03-06)

• replace Array#indexOf with indexof module to deal with older browsers (4ba0bd51)
• ship browser build with npm module too (47e0cc85)

Moved repository to estools (2014-11-24)

Moved repository from twada/espurify to estools/espurify.

1.0.0 (2014-11-01)

The first stable release.

0.1.3 (2014-08-01)

0.1.2 (2014-07-22)

0.1.1 (2014-07-22)

0.1.0 (2014-07-22)

The first release.