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GraalVM JavaScript (Graal.js) Changelog

This changelog summarizes major changes between GraalVM versions of the GraalVM JavaScript (ECMAScript) language runtime. The main focus is on user-observable behavior of the engine.

Version 20.0.0

  • Added name property to anonymous functions.
  • String.prototype.matchAll is available in ECMAScript 2020 mode (--js.ecmascript-version=2020) only.
  • Implemented the String.prototype.replaceAll proposal. It is available in ECMAScript 2020 mode (--js.ecmascript-version=2020).
  • Added js.load-from-classpath option to allow loading files from the classpath via classpath: pseudo URLs (disabled by default). Do not use with untrusted code.

Version 19.3.0

  • Implemented the Promise.allSettled proposal. It is available in ECMAScript 2020 mode (--js.ecmascript-version=2020).
  • Implemented the nullish coalescing proposal. It is available in ECMAScript 2020 mode (--js.ecmascript-version=2020).
  • Updated ICU4J library to version 64.2.
  • Updated ASM library to version 7.1.
  • Updated Node.js to version 12.10.0.
  • Disabled the non-standard global global property by default, which has been superseded by globalThis; use option js.global-property to reenable.
  • Disabled the non-standard performance global property by default except for the js launcher; use option js.performance to reenable.
  • Disabled the non-standard print and printErr functions in Node.js; use option js.print to reenable.

Version 19.2.0

  • Added support for date and time interop.
  • Added support for setting the time zone via Context.Builder.timeZone.
  • Implemented Numeric separators proposal. It is available in ECMAScript 2020 mode (--js.ecmascript-version=2020).
  • Moved ICU data previously distributed as separate files into the native image.
  • Added import.meta.url property.

Version 19.1.0

  • Added (experimental) option js.locale to set the default locale for locale-sensitive operations.
  • Allow making evaluated sources internal using the sourceURL directive by prefixing the URL with internal:, e.g. //# sourceURL=internal:myname.js.
  • Object.getOwnPropertyDescriptor(s) supported for non-JavaScript objects as well.
  • Enabled code sharing across threads using ContextPolicy.SHARED.

Version 19.0.0

  • Various bugfixes for compilation problems.

Version 1.0.0 RC16

  • provide js.load-from-url to allow loading from a URL.
  • provide js.bigint option to enable the BigInt proposal, available only in ECMAScript 2019 or later (enabled by default for those version, set to false to disable).

Version 1.0.0 RC15

  • Removed non-standard String.prototype.contains; use includes instead.
  • ScriptEngine: security-relevant Context-options are now disabled by default.
  • Migrated to Truffle Libraries for interop.
  • Polyglot builtin enabled based on Context.Builder.allowPolyglotAccess().
  • Added object rest and spread properties support for foreign objects.

Version 1.0.0 RC14

  • Option js.function-arguments-limit to set an upper bound for function arguments and argument spreading (default: 65535).
  • Support for HTML-like comments added.
  • Option js.experimental-array-prototype has been renamed to js.experimental-foreign-object-prototype. In addition to setting the prototype of array-like non-JS objects to Array.prototype it sets the prototype of executable non-JS objects to Function.prototype and the prototype of all other non-JS objects to Object.prototype.
  • --jvm.* and --native.* command line options are deprecated and replaced by --vm.* options
  • Implemented JSON superset proposal.

Version 1.0.0 RC13

  • Made Java interop available in native images. Note that you have to configure the accessible classes and methods at native image build time (see reflection configuration).
  • Removed deprecated experimental Java.Worker API. Node.js Workers should be used instead.
  • Removed deprecated NashornJavaInterop mode.
  • Object.fromEntries proposal implemented.
  • Implemented import() proposal.
  • Updated Node.js to version 10.15.2.

Version 1.0.0 RC12

  • Added option js.experimental-array-prototype that sets prototype of array-like non-JS objects (like ProxyArray or Java List) to Array.prototype. It is possible to use functions like map or forEach on these objects directly then.
  • Updated Node.js to version 10.15.0.
  • Added mime type application/javascript+module for ES module sources.
  • Changed the option name for the non-standard global property to js.global-property.

Version 1.0.0 RC11

  • Graal.js only supports ECMAScript 5 (ES5) and newer, and enforces that rule.
  • Added option js.disable-eval to enable eval() and similar methods of dynamic code evaluation (enabled by default, set to false to disable).
  • Added option js.disable-with to enable the with statement (enabled by default, set to false to disable).
  • Instrumentation: Extended inline parsing to support statements.
  • Added support for sharing Java objects using the experimental Node.js Worker Threads API.
  • Added support for ScriptEngine GLOBAL_SCOPE bindings.
  • Made Bindings created by ScriptEngine#createBindings() implement AutoCloseable to allow closing the underlying Context.
  • Do not provide Java builtin object when Java interop is disabled.
  • Added option js.print to enable the print and printErr builtins (enabled by default, set to false to disable).
  • Added option js.load to enable the load and loadWithNewGlobal builtins (enabled by default, set to false to disable).
  • Added option js.polyglot-builtin to enable the Polyglot builtins (enabled by default, set to false to disable).

Version 1.0.0 RC10

  • Added support for Array.prototype.{flat,flatMap}, a Stage 3 proposal.
  • Atomics.wake available under its new name (Atomics.notify) as well.
  • Well-formed JSON.stringify proposal implemented.
  • globalThis proposal implemented.
  • Added Java.addToClasspath(path) for adding jar files and directories to the host classpath dynamically.
  • Disabled non-standard global functions quit, read, readbuffer, and readline by default, except for the js launcher (js.shell option).
  • Disabled non-standard global functions readFully and readLine by default, now available only in Nashorn scripting mode (--js.scripting).
  • Disabled Nashorn syntax extensions by default (js.syntax-extensions option), barring ScriptEngine.
  • Note: As a result, eval requires function expressions to be parenthesized, e.g.: eval("(function(){...})") (not eval("function(){...}")).

Version 1.0.0 RC8

  • Provide simplified implementations for methods of the global console object even outside Node.js mode.
  • Updated Node.js to version 10.9.0.
  • Fix: Can construct Proxy(JavaType) and correctly reports as type function. Github #60.

Version 1.0.0 RC7

  • Improved support for sharing of shapes between Contexts with the same Engine.
  • Provide support for BigInteger TypedArrays, cf. ECMAScript BigInt proposal.
  • Extended instrumentation support to more types of interpreter nodes.

Version 1.0.0 RC6

  • Serialization API of v8/Node.js implemented.
  • Update version of Unicode to 11 in RegExp and Intl.
  • Implement Truffle file virtualization for JavaScript.
  • Support polyglot Truffle objects in Array.prototype.map et al and Array.prototype.sort.
  • Support for fuzzy time in performance.now() and Date.

Version 1.0.0 RC5

  • Add support for Symbol.prototype.description, a Stage 3 proposal.
  • Add support for String.prototype.matchAll, a Stage 3 proposal.
  • Implement optional catch binding proposal, targeted for ES2019.
  • Removed legacy NashornExtensions option, use --js.nashorn-compat instead.
  • Provide Java package globals by default.

Version 1.0.0 RC4

  • Added stack trace limit option (--js.stack-trace-limit).
  • Enable SharedArrayBuffers by default.
  • Provide $EXEC for Nashorn compatibility in scripting mode.
  • Provide Java.isScriptFunction, Java.isScriptObject, Java.isJavaMethod, and Java.isJavaFunction in Nashorn compatibility mode.
  • Provide support to access getters and setters like a field, in Nashorn compatibility mode.
  • Provide top-level package globals in Nashorn compatibility mode: java, javafx, javax, com, org, edu.
  • Provide Java.extend, Java.super, and new Interface|AbstractClass(fn|obj) in Nashorn compatibility mode.
  • Provide java.lang.String methods on string values, in Nashorn compatibility mode.
  • Provide JavaImporter class in Nashorn compatibility mode.
  • Provide JSAdapter class only in Nashorn compatibility mode.

Version 1.0.0 RC3

  • Added support for BigInt arithmetic expressions.
  • Provide a flag for a Nashorn compatibility mode (--js.nashorn-compat).
  • Rename flag for V8 compatibility mode (to --js.v8-compat).

Version 1.0.0 RC2

  • Enabled code sharing between Contexts with the same Engine.
  • Updated Node.js to version 8.11.1.

Version 1.0.0 RC1

  • LICENSE set to The Universal Permissive License (UPL), Version 1.0.

Version 0.33

  • Added object rest/spread support.
  • Added support for async generators.
  • Unified Polyglot primitives across all Truffle languages; e.g., rename Interop builtin to Polyglot.