Changes

Changes with njs 0.9.3

Release Date: 07 October 2025

nginx modules:

Bugfix: fixed heap-use-after-free while module loading.
Bugfix: fixed heap-use-after-free in js_set handler used in log phase. The issue was introduced in 04f6dfb (0.9.2).

Changes with njs 0.9.2

Release Date: 23 September 2025

nginx modules:

Feature: added HTTP keepalive support for ngx.fetch() API.
Improvement: added configure time check when the js_import directive is not specified for http or stream.
Bugfix: fixed merging of js_path directives for http and stream.
Bugfix: fixed building when the ngx_http_ssl_module and ngx_stream_ssl_module modules are unavailable.

Core:

Change: increased the default stack size to 160k for njs VM.
Feature: added njs.on('exit') API for the qjs engine.
Improvement: optimized memory consumption while streaming in qjs.
Bugfix: fixed building qjs engine with clang 19.
Bugfix: fixed building with GCC 15 and O3 optimization level.

Changes with njs 0.9.1

Release Date: 10 Jul 2025

nginx modules:

Feature: added Fetch API for QuickJS engine.
Feature: added state file for a shared dictionary.
Bugfix: fixed handling of Content-Length header when a body is provided in Fetch API.
Bugfix: fixed qjs engine after bellard/quickjs@458c34d2.
Bugfix: fixed NULL pointer dereference when processing If-Match and If-Unmodified-Since headers.

Core:

Feature: added ECDH support for WebCrypto.
Improvement: reduced memory consumption by the object hash. The new hash uses 42% less memory per element.
Improvement: reduced memory consumption for concatenation of numbers and strings.
Improvement: reduced memory consumption of String.prototype.concat() with scalar values.
Bugfix: fixed segfault in njs_property_query(). The issue was introduced in b28e50b1 (0.9.0).
Bugfix: fixed Function constructor template injection.
Bugfix: fixed GCC compilation with O3 optimization level.
Bugfix: fixed constant is too large for 'long' warning on MIPS -mabi=n32.
Bugfix: fixed compilation with GCC 4.1.
Bugfix: fixed %TypedArray%.from() with the buffer is detached by the mapper.
Bugfix: fixed %TypedArray%.prototype.slice() with overlapping buffers.
Bugfix: fixed handling of detached buffers for typed arrays.
Bugfix: fixed frame saving for async functions with closures.
Bugfix: fixed RegExp compilation of patterns with escaped '[' characters.

Changes with njs 0.9.0

Release Date: 06 May 2025

Core:

Feature: refactored handling of built-in strings, symbols, and small integers. Performance improvements (arewefastyet/benchmarks/v8-v7 benchmark):
- Richards: +57% (631 → 989)
- Crypto: +7% (1445 → 1551)
- RayTrace: +37% (562 → 772)
- NavierStokes: +20% (2062 → 2465)
- Overall score: +29% (1014 → 1307)
Bugfix: fixed handling of undefined values of a captured group in RegExp.prototype[Symbol.split]().
Bugfix: fixed GCC 15 build error with -Wunterminated-string-initialization.

Changes with njs 0.8.10

Release Date: 08 April 2025

nginx modules:

Feature: reading r.requestText or r.requestBuffer from a temporary file. Previously, an exception was thrown when accessing r.requestText or r.requestBuffer if the size of the client request body exceeded client_body_buffer_size.
Improvement: improved reporting of unhandled promise rejections.
Bugfix: fixed name corruption in variables and headers processing.
Bugfix: fixed incr() method of a shared dictionary with an empty init argument for the QuickJS engine.
Bugfix: accepting response headers with underscore characters in Fetch API.

Core:

Change: fixed serializeToString(). Previously, serializeToString() was exclusiveC14n() which returned a string instead of Buffer. According to the published documentation, it should be c14n().
Feature: added WebCrypto API for the QuickJS engine.
Feature: added TextEncoder and TextDecoder for the QuickJS engine.
Feature: added querystring module for the QuickJS engine.
Feature: added crypto module for the QuickJS engine.
Feature: added xml module for the QuickJS engine.
Feature: added support for the QuickJS-NG library.
Bugfix: fixed Buffer.concat() with a single argument in QuickJS.
Bugfix: added missed syntax error for await in template literal.
Bugfix: fixed non-NULL terminated strings formatting in exceptions for the QuickJS engine.
Bugfix: fixed compatibility with recent change in QuickJS and QuickJS-NG.

Changes with njs 0.8.9

Release Date: 14 January 2025

nginx modules:

Bugfix: removed extra VM creation per server. Previously, when js_import was declared in http or stream blocks, an extra copy of the VM instance was created for each server block. This was not needed and consumed a lot of memory for configurations with many server blocks. This issue was introduced in 0.8.6 and was partially fixed for location blocks only in 0.8.7.

Core:

Feature: implemented fs for the QuickJS engine.

Changes with njs 0.8.8

Release Date: 10 December 2024

nginx modules:

Feature: implemented shared dictionary for the QuickJS engine.
Improvement: js_preload_object is refactored.
Bugfix: fixed limit rated output.
Bugfix: optimized use of SSL contexts for the js_fetch_trusted_certificate directive.

Core:

Feature: implemented process object for the QuickJS engine.
Feature: implemented the process.kill() method.
Bugfix: fixed XML tests with libxml2 2.13 and later.
Bugfix: fixed promise resolving when Promise is inherited.
Bugfix: fixed absolute scope in cloned VMs.

Changes with njs 0.8.7

Release Date: 22 October 2024

nginx modules:

Bugfix: eliminated unnecessary VM creation. Previously, njs consumed memory proportionally to the number of nginx locations. The issue was introduced in 0.8.6.
Improvement: added strict syntax validation for js_body_filter.
Improvement: improved error messages for module loading failures.

Core:

Feature: implemented fs.readlinkSync().
Improvement: implemented lazy stack symbolization.
Bugfix: fixed heap-buffer-overflow in Buffer.prototype.indexOf(). The issue was introduced in 0.8.6.
Bugfix: fixed Buffer.prototype.lastIndexOf() when `from` is provided.

Changes with njs 0.8.6

Release Date: 02 October 2024

nginx modules:

Feature: introduced the QuickJS engine.
Feature: added optional nocache flag for the js_set directive for http and stream. Thanks to Thomas P.
Feature: exposed capture group variables in the HTTP module. Thanks to Thomas P.

Core:

Feature: added Buffer module for the QuickJS engine.
Bugfix: fixed handling of empty labelled statement in a function.
Bugfix: fixed Function constructor handling when called without arguments.
Bugfix: fixed Buffer.prototype.writeInt8() and friends.
Bugfix: fixed Buffer.prototype.writeFloat() and friends.
Bugfix: fixed Buffer.prototype.lastIndexOf().
Bugfix: fixed Buffer.prototype.write().
Bugfix: fixed maybe-uninitialized warnings in error creation.
Bugfix: fixed ctx.codepoint initialization in UTF-8 decoding.
Bugfix: fixed length initialization in Array.prototype.pop().
Bugfix: fixed handling of encode arg in fs.readdir() and fs.realpath().

Changes with njs 0.8.5

Release Date: 25 June 2024

nginx modules:

Change: bytes invalid in UTF-8 encoding are converted into the replacement character in:
- r.variables.var, r.requestText, r.responseText, s.variables.var,
- the data argument of the s.on() callback with upload or download event types,
- the data argument of the js_body_filter directive.
When working with binary data, use:
- r.rawVariables.var, r.requestBuffer, r.responseBuffer, s.rawVariables.var,
- the upstream or downstream event type for s.on(),
- buffer_type=buffer for js_body_filter.
Feature: added timeout argument for add(), set(), and incr() methods of a shared dictionary.
Bugfix: fixed checking for duplicate js_set variables.
Bugfix: fixed request Host header when the port is non-standard.
Bugfix: fixed handling of a zero-length request body in ngx.fetch() and r.subrequest().
Bugfix: fixed heap-buffer-overflow in Headers.get().
Bugfix: fixed r.subrequest() error handling.

Core:

Feature: added zlib module for QuickJS engine.
Bugfix: fixed zlib.inflate().
Bugfix: fixed String.prototype.replaceAll() with a zero-length argument.
Bugfix: fixed retval handling after an exception in Array.prototype.toSpliced(), Array.prototype.toReversed(), Array.prototype.toSorted().
Bugfix: fixed RegExp.prototype[@@replace]() with replacements containing $', $` and strings with Unicode characters.
Bugfix: fixed a one-byte overread in decodeURI() and decodeURIComponent().
Bugfix: fixed tracking of argument scope.
Bugfix: fixed integer overflow in Date.parse().

Changes with njs 0.8.4

Release Date: 16 April 2024

nginx modules:

Feature: the Server header for outgoing header can be set.
Improvement: validating URI and args arguments in r.subrequest().
Improvement: checking for duplicate js_set variables.
Bugfix: fixed clear() method of a shared dictionary without a timeout introduced in 0.8.3.
Bugfix: fixed r.send() method of a shared dictionary without a timeout with Buffer argument.

Core:

Feature: added QuickJS engine support in CLI.
Bugfix: fixed atob() with non-padded base64 strings.

Changes with njs 0.8.3

Release Date: 07 February 2024

nginx modules:

Bugfix: fixed Headers.set().
Bugfix: fixed js_set with Buffer values.
Bugfix: fixed clear() method of a shared dictionary when a timeout is not specified.
Bugfix: fixed stub_status statistics when js_periodic is enabled.

Core:

Bugfix: fixed building with libxml2 2.12 and later.
Bugfix: fixed Date constructor for overflows and with NaN values.
Bugfix: fixed underflow in querystring.parse().
Bugfix: fixed potential buffer overread in String.prototype.match().
Bugfix: fixed parsing of for-in loops.
Bugfix: fixed parsing of hexadecimal, octal, and binary literals with no digits.

Changes with njs 0.8.2

Release Date: 24 October 2023

nginx modules:

Feature: introduced console object. The following methods were introduced: error(), info(), log(), time(), timeEnd(), warn().
Bugfix: fixed HEAD response handling with large Content-Length in Fetch API.
Bugfix: fixed items() method for a shared dictionary.
Bugfix: fixed delete() method for a shared dictionary.

Core:

Feature: extended fs module. Added fs.existsSync().
Bugfix: fixed xml module. Broken XML exception handling in xml.parse() method was fixed.
Bugfix: fixed Regexp.prototype.exec() with global regexp and Unicode input.

Changes with njs 0.8.1

Release Date: 12 September 2023

nginx modules:

Feature: introduced the js_periodic directive for http and stream that allows specifying a JS handler to run at regular intervals.
Feature: implemented items() method of a shared dictionary. The method returns all the non-expired key-value pairs.
Bugfix: fixed size() and keys() methods of a shared dictionary.
Bugfix: fixed erroneous exception in r.internalRedirect() introduced in 0.8.0.

Core:

Bugfix: fixed incorrect order of keys in Object.getOwnPropertyNames().

Changes with njs 0.8.0

Release Date: 06 July 2023

nginx modules:

Change: removed special treatment of forbidden headers in Fetch API introduced in 0.7.10.
Change: removed deprecated since 0.5.0 r.requestBody and r.responseBody in http module.
Change: throwing an exception in r.internalRedirect() while filtering in http module.
Feature: introduced more global nginx properties: ngx.build, ngx.conf_file_path, ngx.error_log_path, ngx.prefix, ngx.version, ngx.version_number, and ngx.worker_id.
Feature: introduced the js_shared_dict_zone directive for http and stream that allows declaring a dictionary shared between worker processes.
Feature: introduced global nginx.shared methods and properties for working with shared dictionaries.
Improvement: added compile-time options to disable njs modules. For example, to disable libxslt-related code:
```
NJS_LIBXSLT=NO ./configure .. --add-module=/path/to/njs/module
```
Bugfix: fixed r.status setter when filtering in http module.
Bugfix: fixed setting of Location header in http module.

Core:

Change: native methods are provided with retval argument. This change breaks compatibility with C extension for njs requiring the modification of the code.
Change: non-compliant deprecated String methods were removed. The following methods were removed: String.bytesFrom(), String.prototype.fromBytes(), String.prototype.fromUTF8(), String.prototype.toBytes(), String.prototype.toUTF8(), String.prototype.toString(encoding).
Change: removed support for building with GNU readline.
Feature: added ES13-compliant Array methods: Array.from(), Array.prototype.toSorted(), Array.prototype.toSpliced(), Array.prototype.toReversed().
Feature: added ES13-compliant TypedArray methods: %TypedArray%.prototype.toSorted(), %TypedArray%.prototype.toSpliced(), %TypedArray%.prototype.toReversed().
Feature: added CryptoKey properties in WebCrypto API. The following properties were added: algorithm, extractable, type, usages.
Bugfix: fixed retval of сrypto.getRandomValues().
Bugfix: fixed evaluation of computed property names with function expressions.
Bugfix: fixed implicit name for a function expression declared in arrays.
Bugfix: fixed parsing of for-in loops.
Bugfix: fixed Date.parse() with ISO-8601 format and UTC time offset.

Changes with njs 0.7.12

Release Date: 10 April 2023

nginx modules:

Bugfix: fixed Headers() constructor in Fetch API.

Core:

Feature: added Hash.copy() method in crypto module.
Feature: added zlib module.
Improvement: added support for export {name as default} statement.
Bugfix: fixed Number constructor according to the spec.

Changes with njs 0.7.11

Release Date: 09 March 2023

nginx modules:

Bugfix: added missed linking with libxml2 for the dynamic module. The bug was introduced in 0.7.10.

Core:

Feature: added XMLNode API to modify XML documents.
Change: removed XML_PARSE_DTDVALID during parsing of an XML document due to security implications. The issue was introduced in 0.7.10. When XML_PARSE_DTDVALID is enabled, libxml2 parses and executes external entities present inside an XML document.
Bugfix: fixed the detection of await in arguments.
Bugfix: fixed Error() instance dumping when "name" prop is not primitive.
Bugfix: fixed array instance with a getter property dumping.
Bugfix: fixed njs_object_property() with NJS_WHITEOUT properties.
Bugfix: fixed func instance dumping with "name" as getter.
Bugfix: fixed attaching of a stack to an error object.
Bugfix: fixed String.prototype.replace() with replacement containing "$'", "$`".

Changes with njs 0.7.10

Release Date: 07 February 2023

nginx modules:

Feature: added Request, Response, and Headers ctors in Fetch API.
Bugfix: fixed nginx logger callback for calls in the master process.

Core:

Feature: added signal support in CLI.
Feature: added xml module for working with XML documents.
Feature: extended support for symmetric and asymmetric keys in WebCrypto. Most notably JWK format for importKey() was added.
Feature: extended support for symmetric and asymmetric keys in WebCrypto API. Most notably JWK format for importKey() was added. generateKey() and exportKey() were also implemented.
Feature: added String.prototype.replaceAll().
Bugfix: fixed for(expr1; conditional syntax error handling.
Bugfix: Object.values() and Object.entries() with external objects.
Bugfix: fixed RegExp.prototype[@@replace]().

Changes with njs 0.7.9

Release Date: 17 November 2022

nginx modules:

Bugfix: fixed Fetch Response prototype reinitialization. When at least one js_import directive was declared in both HTTP and Stream, ngx.fetch() returned inapproriate response in Stream. The bug was introduced in 0.7.7.

Core:

Bugfix: fixed String.prototype.replace(re) if re.exec() returns non-flat array.
Bugfix: fixed Array.prototype.fill() when start object changes this.
Bugfix: fixed description for fs.mkdir() and fs.rmdir() methods.
Bugfix: fixed %TypedArray%.prototype.set(s) when s element changes this.
Bugfix: fixed Array.prototype.splice(s,d) when d resizes this during eval.
Bugfix: fixed for-in loop with left and right hand side expressions.

Changes with njs 0.7.8

Release Date: 25 October 2022

nginx modules:

Feature: added js_preload_object directive.
Feature: added ngx.conf_prefix property.
Feature: added s.sendUpstream() and s.sendDownstream() in stream module.
Feature: added support for HEAD method in Fetch API.
Improvement: improved async callback support for s.send() in stream module.

Core:

Feature: added name instance property for a function object.
Feature: added njs.memoryStats object.
Bugfix: fixed String.prototype.trimEnd() with unicode string.
Bugfix: fixed Object.freeze() with fast arrays.
Bugfix: fixed Object.defineProperty() with fast arrays.
Bugfix: fixed async token as a property name of an object.
Bugfix: fixed property set instruction when key modifies base binding.
Bugfix: fixed complex assignments.
Bugfix: fixed handling of unhandled promise rejection.
Bugfix: fixed process.env when duplicate environ variables are present.
Bugfix: fixed double declaration detection in modules.
Bugfix: fixed bound function calls according to the spec.
Bugfix: fixed break label for if statement.
Bugfix: fixed labeled empty statements.

Changes with njs 0.7.7

Release Date: 30 August 2022

nginx modules:

Feature: the number of nginx configuration contexts where js directives can be specified is extended.
- HTTP: the js_import, js_path, js_set, and js_var directives are allowed in server and location contexts. The js_content, js_body_filter and js_header_filter are allowed in if context.
- Stream: the js_import, js_path, js_set, and js_var are allowed in server context.
Feature: added r.internal property.
Bugfix: fixed reading response body in Fetch API.
Bugfix: fixed js_fetch_timeout in stream.
Bugfix: fixed socket leak with 0 fetch timeout.

Core:

Feature: extended fs module. Added fs.openSync(), fs.promises.open(), fs.fstatSync(), fs.readSync(), fs.writeSync().

The following properties of FileHandle are implemented: fd, read(), stat(), write(), close().
Bugfix: fixed parseInt(), parseFloat(), Symbol.for() with no arguments.

Changes with njs 0.7.6

Release Date: 19 July 2022

nginx modules:

Feature: improved r.args{} object. Added support for multiple arguments with the same key. Added case sensitivity for keys. Keys and values are percent-decoded now.
Bugfix: fixed r.headersOut{} setter for special headers.

Core:

Feature: added Symbol.for() and Symbol.keyfor().
Feature: added atob() and btoa() from WHATWG spec.
Bugfix: fixed large non-decimal literals.
Bugfix: fixed Unicode argument trimming in parseInt().
Bugfix: fixed break instruction in try-catch block.
Bugfix: fixed async function declaration in CLI.

Changes with njs 0.7.5

Release Date: 21 June 2022

nginx modules:

Change: adapting to changes in nginx header structures.
Bugfix: fixed r.headersOut{} special getters when value is absent.
Change: returning undefined value instead of an empty string for Content-Type when the header is absent.

Core:

Bugfix: fixed catching of the exception thrown from an awaited function.
Bugfix: fixed function value initialization.
Bugfix: fixed interpreter when await fails.
Bugfix: fixed typed-array constructor when source array is changed while iterating.
Bugfix:fixed String.prototype.replace() with byte strings.
Bugfix: fixed template literal from producing byte-strings.
Bugfix: fixed array iterator with sparse arrays.
Bugfix: fixed memory free while converting a flat array to a slow array.
Bugfix: properly handling NJS_DECLINE in promise native functions.
Bugfix: fixed working with an array-like object in Promise.all() and friends.

Changes with njs 0.7.4

Release Date: 24 May 2022

nginx modules:

Feature: added extended directives for configuring Fetch API. The following directives were added for http and stream:
Change: r.internalRedirect() now accepts escaped URIs.
Bugfix: fixed Response parsing with more than 8 headers in Fetch API.

Core:

Feature: added njs.version_number property.
Feature: added compatibility with BoringSSL for WebCrypto API.
Bugfix: fixed Array.prototype.sort() when arr size is changed in a comparator.
Bugfix: fixed Array.prototype.slice() with slow this argument.
Bugfix: fixed aggregation methods of Promise ctor with array-like object.
Bugfix: fixed String.prototype.lastIndexOf() with Unicode string as this.
Bugfix: fixed JSON.parse() when reviver function is provided.
Bugfix: fixed Object.defineProperty() when a recursive descriptor is provided.
Bugfix: fixed Array.prototype.fill() for typed-arrays.
Bugfix: making function expression binding immutable according to the specs.
Bugfix: fixed redefinition of special props in Object.defineProperty().

Changes with njs 0.7.3

Release Date: 12 April 2022

Core:

Feature: added support of module resolution callback. This feature allows the host environment to control how imported modules are loaded.
Bugfix: fixed backtraces while traversing imported user modules.
Bugfix: fixed Array.prototype.concat() when this is a slow array.
Bugfix: fixed frame allocation from an awaited frame.
Bugfix: fixed allocation of large array literals.
Bugfix: fixed interpreter when toString conversion fails.

Changes with njs 0.7.2

Release Date: 25 January 2022

Core:

Bugfix: fixed Array.prototype.join() when array is changed while iterating.
Bugfix: fixed Array.prototype.slice() when array is changed while iterating.
Bugfix: fixed Array.prototype.concat() when array is changed while iterating.
Bugfix: fixed Array.prototype.reverse() when array is changed while iterating.
Bugfix: fixed Buffer.concat() with subarrays. Thanks to Sylvain Etienne.
Bugfix: fixed type confusion bug while resolving promises.
Bugfix: fixed Function.prototype.apply() with large array arguments.
Bugfix: fixed recursive async function calls.
Bugfix: fixed function redeclaration. The bug was introduced in 0.7.0.

Changes with njs 0.7.1

Release Date: 28 December 2021

nginx modules:

Change: the js_include directive deprecated since 0.4.0 was removed.
Change: PCRE/PCRE2-specific code was moved to the modules. This ensures that njs uses the same RegExp library as nginx.

Core:

Bugfix: fixed decodeURI() and decodeURIComponent() with invalid byte strings. The bug was introduced in 0.4.3.
Bugfix: fixed heap-use-after-free in await frame. The bug was introduced in 0.7.0.
Bugfix: fixed WebCrypto sign() and verify() methods with OpenSSL 3.0.
Bugfix: fixed exception throwing when RegExp match fails. The bug was introduced in 0.1.15.
Bugfix: fixed catching of exception thrown in try block of async function. The bug was introduced in 0.7.0.
Bugfix: fixed execution of async function in synchronous context. The bug was introduced in 0.7.0.
Bugfix: fixed function redeclaration in CLI when interactive mode is on. The bug was introduced in 0.6.2.
Bugfix: fixed typeof operator with DataView object.
Bugfix: eliminated information leak in Buffer.from().

Changes with njs 0.7.0

Release Date: 19 October 2021

nginx modules:

Feature: Added HTTPS support for Fetch API.
Feature: Added setReturnValue() method for http and stream.

Core:

Feature: introduced Async/Await implementation.
Feature: added WebCrypto API implementation.
Bugfix: fixed copying of closures for declared functions. The bug was introduced in 0.6.0.
Bugfix: fixed unhandled promise rejection in handle events.
Bugfix: fixed Response.headers getter in Fetch API.

Changes with njs 0.6.2

Release Date: 31 August 2021

nginx modules:

Bugfix: fixed CPU hog when js_filter is registered in both directions.

Core:

Feature: introduced AggregateError implementation.
Feature: added remaining Promise constructor methods. The following methods were added: Promise.all(), Promise.allSettled(), Promise.any(), Promise.race().
Improvement: removed recursion from code generator.
Bugfix: fixed rest parameter parsing without binding identifier.
Bugfix: fixed resolve/reject callback for Promise.prototype.finally() .
Bugfix: fixed %TypedArray%.prototype.join() with detached buffer.
Bugfix: fixed memory leak in interactive shell.

Changes with njs 0.6.1

Release Date: 29 June 2021

Bugfix: fixed RegExpBuiltinExec() with UTF-8 only regexps. The bug was introduced in 0.4.2.
Bugfix: fixed parsing of export default declaration with non-assignment expressions. Thanks to Artem S. Povalyukhin.

Changes with njs 0.6.0

Release Date: 15 June 2021

Core:

Feature: added let and const declaration support.
Feature: added RegExp.prototype[Symbol.split].
Feature: added sticky flag support for RegExp.
Bugfix: fixed heap-buffer-overflow in String.prototype.lastIndexOf().
Bugfix: fixed RegExp.prototype.test() according to the specification.
Bugfix: fixed String.prototype.split() according to the specification.
Bugfix: fixed use-of-uninitialized-value while tracking rejected promises.
Bugfix: fixed njs.dump() for objects with circular references.

Changes with njs 0.5.3

Release Date: 30 March 2021

nginx modules:

Feature: added the js_var directive for http and stream.

Changes with njs 0.5.2

Release Date: 09 March 2021

nginx modules:

Feature: added the js_body_filter directive.
Feature: introduced the s.status property for Stream Session object.

Core:

Feature: added njs.on (exit) callback support.
Bugfix: fixed property descriptor reuse for not extensible objects. Thanks to Artem S. Povalyukhin.
Bugfix: fixed Object.freeze() and friends according to the specification. Thanks to Artem S. Povalyukhin.
Bugfix: fixed Function() in CLI mode.
Bugfix: fixed for-in iteration of typed array values. Thanks to Artem S. Povalyukhin.

Changes with njs 0.5.1

Release Date: 16 February 2021

nginx modules:

Feature: introduced ngx.fetch() method implementing Fetch API.

The following properties and methods of Response object are implemented: arrayBuffer(), bodyUsed, json(), headers, ok, redirect, status, statusText, text(), type, url.

Notable limitations: only the http:// scheme is supported, redirects are not handled.

In collaboration with 洪志道 (Hong Zhi Dao).
Feature: added the js_header_filter directive.
Bugfix: fixed processing buffered data in body filter in stream module.

Core:

Bugfix: fixed safe mode bypass in Function constructor.
Bugfix: fixed Date.prototype.toISOString() with invalid date values.

Changes with njs 0.5.0

Release Date: 01 December 2020

nginx modules:

Feature: introduced global ngx object.

The following methods were added:
- ngx.log(level, message)
The following properties were added:
- ngx.INFO, ngx.WARN, ngx.ERR.
Feature: added support for Buffer object where string is expected.
Feature: added Buffer version of existing properties.

The following properties were added:
- r.requestBuffer (r.requestBody), r.responseBuffer (r.responseBody), r.rawVariables (r.variables), s.rawVariables (s.variables).
The following events were added in the stream module:
- upstream (upload), downstream (download).
Improvement: added aliases to existing properties.

The following properties were added:
- r.requestText (r.requestBody), r.responseText (r.responseBody).
Improvement: throwing an exception in r.internalRedirect() for a subrequest.
Bugfix: fixed promise r.subrequest() with error_page redirect.
Bugfix: fixed promise events handling.

Core:

Feature: added TypeScript definitions for built-in modules. Thanks to Jakub Jirutka.
Feature: tracking unhandled promise rejection.
Feature: added initial iterator support. Thanks to Artem S. Povalyukhin.
Improvement: TypeScript definitions are refactored. Thanks to Jakub Jirutka.
Improvement: added forgotten support for Object.prototype.valueOf() in Buffer.from().
Bugfix: fixed heap-use-after-free in JSON.parse().
Bugfix: fixed heap-use-after-free in JSON.stringify().
Bugfix: fixed JSON.stringify() for arrays resizable via getters.
Bugfix: fixed heap-buffer-overflow for RegExp.prototype[Symbol.replace].
Bugfix: fixed returned value for Buffer.prototype.write* functions.
Bugfix: fixed querystring.stringify(). Thanks to Artem S. Povalyukhin.
Bugfix: fixed the catch handler for Promise.prototype.finally().
Bugfix: fixed querystring.parse().

Changes with njs 0.4.4

Release Date: 29 September 2020

nginx modules:

Bugfix: fixed location merge.
Bugfix: fixed r.httpVersion for HTTP/2.

Core:

Feature: added support for numeric separators (ES12).
Feature: added remaining methods for %TypedArray%.prototype. The following methods were added: every(), filter(), find(), findIndex(), forEach(), includes(), indexOf(), lastIndexOf(), map(), reduce(), reduceRight(), reverse(), some().
Feature: added %TypedArray% remaining methods. The following methods were added: from(), of().
Feature: added DataView object.
Feature: added Buffer object implementation.
Feature: added support for ArrayBuffer in TextDecoder.prototype.decode()
Feature: added support for Buffer object in crypto methods.
Feature: added support for Buffer object in fs methods.
Change: Hash.prototype.digest() and Hmac.prototype.digest() now return a Buffer instance instead of a byte string when encoding is not provided.
Change: fs.readFile() and friends now return a Buffer instance instead of a byte string when encoding is not provided.
Bugfix: fixed function prototype property handler while setting.
Bugfix: fixed function constructor property handler while setting.
Bugfix: fixed String.prototype.indexOf() for byte strings.
Bugfix: fixed RegExpBuiltinExec() with a global flag and byte strings.
Bugfix: fixed RegExp.prototype[Symbol.replace] the when replacement value is a function.
Bugfix: fixed TextDecoder.prototype.decode() with non-zero TypedArray offset.

Changes with njs 0.4.3

Release Date: 11 August 2020

Core:

Feature: added Query String module.
Feature: improved fs.mkdir() to support recursive directory creation. Thanks to Artem S. Povalyukhin.
Feature: improved fs.rmdir() to support recursive directory removal. Thanks to Artem S. Povalyukhin.
Feature: introduced UTF-8 decoder according to WHATWG encoding spec.
Feature: added TextDecoder() and TextEncoder() implementation.
Bugfix: fixed parsing return statement without semicolon.
Bugfix: fixed njs_number_to_int32() for big-endian platforms.
Bugfix: fixed unit test on big-endian platforms.
Bugfix: fixed regexp-literals parsing with "=" characters.
Bugfix: fixed pre/post increment/decrement in assignment operations.

Changes with njs 0.4.2

Release Date: 07 July 2020

Core:

Feature: added RegExp.prototype[Symbol.replace].
Feature: introduced line level backtrace.
Feature: added %TypedArray%.prototype.sort().
Feature: extended fs module. Added mkdir(), readdir(), rmdir(), and friends.
Improvement: parser refactoring.
Bugfix: fixed TypedScript API description for HTTP headers.
Bugfix: fixed TypedScript API description for NjsByteString type.
Bugfix: fixed String.prototype.repeat() according to the specification.
Bugfix: fixed String.prototype.replace() according to the specification.
Bugfix: fixed parsing of flags for regexp literals.
Bugfix: fixed index generation for global objects in generator.
Bugfix: fixed %TypedArray%.prototype.copyWithin() with nonzero byte offset.
Bugfix: fixed Array.prototype.splice() for sparse arrays.
Bugfix: fixed Array.prototype.reverse() for sparse arrays.
Bugfix: fixed Array.prototype.sort() for sparse arrays.

Changes with njs 0.4.1

Release Date: 19 May 2020

nginx modules:

Feature: added support for multi-value headers in r.headersIn{}.
Feature: introduced raw headers API: r.rawHeadersIn[] and r.rawHeadersOut[].
Feature: added TypeScript API description.

Core:

Bugfix: fixed Array.prototype.slice() for sparse arrays.

Changes with njs 0.4.0

Release Date: 23 April 2020

nginx modules:

Feature: added support for multi-value headers in r.headersOut{}.
Feature: added js_import directive for http and stream.
Improvement: improved iteration over r.headersOut{} with special headers.
Improvement: improved iteration over r.headersOut{} with duplicates.
Change: r.responseBody property handler now returns undefined instead of throwing an exception if the response body is not available.

Core:

Feature: added script arguments support in CLI.
Feature: converting externals values to native js objects.
Bugfix: fixed NULL-pointer dereference in __proto__ property handler.
Bugfix: fixed handling of no-newline at the end of the script.
Bugfix: fixed RegExp() constructor with empty pattern and non-empty flags.
Bugfix: fixed String.prototype.replace() when function returns non-string.
Bugfix: fixed reading of pseudofiles in fs.

Changes with njs 0.3.9

Release Date: 03 March 2020

nginx modules:

Feature: added detached mode for r.subrequest(). Responses to detached subrequests are ignored. Unlike ordinary subrequests, a detached subrequest can be created inside a variable handler.

Core:

Feature: added promises API for fs module. Thanks to Artem S. Povalyukhin.
Feature: extended fs module. Added access(), symlink(), unlink(), realpath(), and friends. Thanks to Artem S. Povalyukhin.
Improvement: introduced memory-efficient ordinary arrays.
Improvement: lexer refactoring.
Bugfix: fixed matching of native functions in backtraces.
Bugfix: fixed callback invocations in fs module. Thanks to Artem S. Povalyukhin.
Bugfix: fixed Object.getOwnPropertySymbols().
Bugfix: fixed heap-buffer-overflow in njs_json_append_string().
Bugfix: fixed encodeURI() and decodeURI() according to the specification.
Bugfix: fixed Number.prototype.toPrecision().
Bugfix: fixed handling of space argument in JSON.stringify().
Bugfix: fixed JSON.stringify() with Number() and String() objects.
Bugfix: fixed Unicode Escaping in JSON.stringify() according to specification.
Bugfix: fixed non-native module importing. Thanks to 洪志道 (Hong Zhi Dao).
Bugfix: fixed njs.dump() with the Date() instance in a container.

Changes with njs 0.3.8

Release Date: 21 January 2020

nginx modules:

Feature: added Promise support for r.subrequest(). If a callback is not provided, r.subrequest() returns an ordinary Promise object that resolves to a subrequest response object.
Change: r.parent property handler now returns undefined instead of throwing an exception if a parent object is not available.

Core:

Feature: added Promise support. Implemented according to the specification without: Promise.all(), Promise.allSettled(), Promise.race().
Feature: added initial Typed-arrays support. Thanks to Tiago Natel de Moura.
Feature: added ArrayBuffer support. Thanks to Tiago Natel de Moura.
Feature: added initial Symbol support. Thanks to Artem S. Povalyukhin.
Feature: added externals support for JSON.stringify().
Feature: added Object.is(). Thanks to Artem S. Povalyukhin.
Feature: added Object.setPrototypeOf(). Thanks to Artem S. Povalyukhin.
Feature: introduced nullish coalescing operator.
Bugfix: fixed Object.getPrototypeOf() according to the specification.
Bugfix: fixed Object.prototype.valueOf() according to the specification.
Bugfix: fixed JSON.stringify() with unprintable values and replacer function.
Bugfix: fixed operator in according to the specification.
Bugfix: fixed Object.defineProperties() according to the specification.
Bugfix: fixed Object.create() according to the specification. Thanks to Artem S. Povalyukhin.
Bugfix: fixed Number.prototype.toString(radix) when fast-math is enabled.
Bugfix: fixed RegExp() instance properties.
Bugfix: fixed import segfault. Thanks to 洪志道 (Hong Zhi Dao).

Changes with njs 0.3.7

Release Date: 19 November 2019

nginx modules:

Improvement: refactored iteration over external objects.

Core:

Feature: added Object.assign().
Feature: added Array.prototype.copyWithin().
Feature: added support for labels in console.time().
Change: removed console.help() from CLI.
Improvement: moved constructors and top-level objects to global object.
Improvement: arguments validation for configure script.
Improvement: refactored JSON methods.
Bugfix: fixed heap-buffer-overflow in njs_array_reverse_iterator() function. The following functions were affected: Array.prototype.lastIndexOf(), Array.prototype.reduceRight().
Bugfix: fixed [[Prototype]] slot of NativeErrors.
Bugfix: fixed NativeError.prototype.message properties.
Bugfix: added conversion of this value to object in Array.prototype functions.
Bugfix: fixed iterator for Array.prototype.find() and Array.prototype.findIndex() functions.
Bugfix: fixed Array.prototype.includes() and Array.prototype.join() with undefined argument.
Bugfix: fixed constructor property of Hash and Hmac objects.
Bugfix: fixed __proto__ property of getters and setters.
Bugfix: fixed Date object string formatting.
Bugfix: fixed handling of NaN and -0 arguments in Math.min() and Math.max().
Bugfix: fixed Math.round() according to the specification.
Bugfix: reimplemented bound functions according to the specification.

Changes with njs 0.3.6

Release Date: 22 October 2019

nginx modules:

Improvement: getting special headers from r.headersIn{}.

Core:

Feature: added new Function() support.
Feature: added Number.prototype.toFixed().
Feature: added Number.prototype.toPrecision().
Feature: added Number.prototype.toExponential().
Improvement: making prototype property of function instances writable.
Improvement: limiting recursion depth while compiling.
Improvement: moving global functions to the global object.
Bugfix: fixed prototype mutation for object literals.
Bugfix: fixed heap-buffer-overflow while parsing regexp literals.
Bugfix: fixed integer-overflow while parsing exponent of number literals.
Bugfix: fixed parseFloat().
Bugfix: fixed Array.prototype functions according to the specification. The following functions were fixed: every, includes, indexOf, filter, find, findIndex, forEach, lastIndexOf, map, pop, push, reduce, reduceRight, shift, some, unshift.
Bugfix: fixed handing of accessor descriptors in Object.freeze().
Bugfix: fixed String.prototype.replace() when first argument is not a string.
Bugfix: fixed stack-use-after-scope in Array.prototype.map().
Bugfix: Date.prototype.toUTCString() format was aligned to ES9.
Bugfix: fixed buffer overflow in Number.prototype.toString(radix).
Bugfix: fixed Regexp.prototype.test() for regexps with backreferences.
Bugfix: fixed Array.prototype.map() for objects with nonexistent values.
Bugfix: fixed Array.prototype.pop() and shift() for sparse objects.
Bugfix: fixed Date.UTC() according to the specification.
Bugfix: fixed Date() constructor according to the specification.
Bugfix: fixed type of Date.prototype. Thanks to Artem S. Povalyukhin.
Bugfix: fixed Date.prototype.setTime(). Thanks to Artem S. Povalyukhin.
Bugfix: fixed default number of arguments expected by built-in functions.
Bugfix: fixed caller and arguments properties of a function instance. Thanks to Artem S. Povalyukhin.

Changes with njs 0.3.5

Release Date: 15 August 2019

Core:

Bugfix: fixed module importing using require(). The bug was introduced in 0.3.4.
Bugfix: fixed [[SetPrototypeOf]].

Changes with njs 0.3.4

Release Date: 13 August 2019

Core:

Feature: added Object shorthand methods and computed property names. Thanks to 洪志道 (Hong Zhi Dao) and Artem S. Povalyukhin.
Feature: added getter/setter literal support. Thanks to 洪志道 (Hong Zhi Dao) and Artem S. Povalyukhin.
Feature: added fs.renameSync().
Feature: added String.prototype.trimEnd() and String.prototype.trimStart().
Improvement: added memory-sanitizer support.
Improvement: Unicode case tables updated to version 12.1.
Improvement: added UTF8 validation for string literals.
Bugfix: fixed reading files with zero size in fs.readFileSync().
Bugfix: extended the list of space separators in String.prototype.trim().
Bugfix: fixed using of uninitialized value in String.prototype.padStart().
Bugfix: fixed String.prototype.replace() for 0ドル and $& replacement string.
Bugfix: fixed String.prototype.replace() for byte strings with regex argument.
Bugfix: fixed global match in String.prototype.replace() with regexp argument.
Bugfix: fixed Array.prototype.slice() for primitive types.
Bugfix: fixed heap-buffer-overflow while importing module.
Bugfix: fixed UTF-8 character escaping.
Bugfix: fixed Object.values() and Object.entries() for shared objects.
Bugfix: fixed uninitialized memory access in String.prototype.match().
Bugfix: fixed String.prototype.match() for byte strings with regex argument.
Bugfix: fixed Array.prototype.lastIndexOf() with undefined arguments.
Bugfix: fixed String.prototype.substring() with empty substring.
Bugfix: fixed invalid memory access in String.prototype.substring().
Bugfix: fixed String.fromCharCode() for code points more than 65535 and NaN.
Bugfix: fixed String.prototype.toLowerCase() and String.prototype.toUpperCase().
Bugfix: fixed Error() constructor with no arguments.
Bugfix: fixed in operator for values with accessor descriptors.
Bugfix: fixed Object.defineProperty() for non-boolean descriptor props.
Bugfix: fixed Error.prototype.toString() with UTF8 string properties.
Bugfix: fixed Error.prototype.toString() with non-string values for name and message.

Changes with njs 0.3.3

Release Date: 25 June 2019

nginx modules:

Improvement: getting of special response headers in r.headersOut{}.
Improvement: working with unknown methods in r.subrequest().
Improvement: added support for null as a second argument of r.subrequest().
Bugfix: fixed processing empty output chain in stream body filter.

Core:

Feature: added runtime support for property getter/setter. Thanks to 洪志道 (Hong Zhi Dao) and Artem S. Povalyukhin.
Feature: added process global object.
Feature: writable most of built-in properties and methods.
Feature: added generic implementation of Array.prototype.fill().
Bugfix: fixed integer-overflow in String.prototype.concat().
Bugfix: fixed setting of object properties.
Bugfix: fixed Array.prototype.toString().
Bugfix: fixed Date.prototype.toJSON().
Bugfix: fixed overwriting "constructor" property of built-in prototypes.
Bugfix: fixed processing of invalid surrogate pairs in strings.
Bugfix: fixed processing of invalid surrogate pairs in JSON strings.
Bugfix: fixed heap-buffer-overflow in toUpperCase() and toLowerCase().
Bugfix: fixed escaping lone closing square brackets in RegExp() constructor.
Bugfix: fixed handling zero byte characters inside RegExp pattern strings.
Bugfix: fixed String.prototype.toBytes() for ASCII strings.
Bugfix: fixed truth value of JSON numbers in JSON.parse().
Bugfix: fixed use-of-uninitialized-value in njs_string_replace_join().
Bugfix: fixed parseInt('-0'). Thanks to Artem S. Povalyukhin.

Changes with njs 0.3.2

Release Date: 21 May 2019

Core:

Feature: added support for template literals. Thanks to 洪志道 (Hong Zhi Dao) and Artem S. Povalyukhin.
Feature: executing command from command line arguments.
Feature: added support for RegExp groups object (ES9).
Feature: added block scoped function definitions support.
Feature: added support for building with GNU Readline library.
Feature: made configurable length, name, and most of built-in methods.
Feature: made all constructor properties configurable.
Bugfix: fixed Regexp.prototype.exec() for Unicode-only regexps.
Bugfix: fixed njs_vm_value_dump() for empty string values.
Bugfix: fixed RegExp constructor for regexp value arguments.
Bugfix: fixed walking over prototypes chain during iteration over an object.
Bugfix: fixed overflow in Array.prototype.concat().
Bugfix: fixed length calculation for UTF-8 string with escape characters.
Bugfix: fixed parsing surrogate pair presents as UTF-16 escape sequences.
Bugfix: fixed processing the "*" quantifier for String.prototype.match().
Bugfix: fixed Date() constructor with one argument.
Bugfix: fixed arrays expansion.
Bugfix: fixed heap-buffer-overflow in String.prototype.replace().
Bugfix: fixed heap-buffer-overflow in String.prototype.lastIndexOf().
Bugfix: fixed regexp literals parsing with escaped backslash and backslash in square brackets.
Bugfix: fixed regexp literals with lone closing brackets.
Bugfix: fixed uninitialized-memory-access in Object.defineProperties().
Bugfix: fixed processing the "*" quantifier for String.prototype.replace().
Bugfix: fixed Array.prototype.slice() for UTF8-invalid byte strings.
Bugfix: fixed String.prototype.split() for UTF8-invalid byte strings.
Bugfix: fixed handling of empty block statements.

Changes with njs 0.3.1

Release Date: 16 April 2019

Core:

Feature: added arrow functions support. Thanks to 洪志道 (Hong Zhi Dao) and Artem S. Povalyukhin.
Feature: added Object.getOwnPropertyNames(). Thanks to Artem S. Povalyukhin.
Feature: added Object.getOwnPropertyDescriptors(). Thanks to Artem S. Povalyukhin.
Feature: making __proto__ accessor descriptor of Object instances mutable.
Feature: added shebang support in CLI.
Feature: added support for module mode execution in CLI. In module mode global, this is unavailable.
Bugfix: fixed editline detection.
Bugfix: fixed Function.prototype.bind(). Thanks to 洪志道 (Hong Zhi Dao).
Bugfix: fixed checking of duplication of parameters for functions. Thanks to 洪志道 (Hong Zhi Dao).
Bugfix: fixed function declaration with the same name as a variable. Thanks to 洪志道 (Hong Zhi Dao).
Improvement: code related to parsing of objects, variables and functions is refactored. Thanks to 洪志道 (Hong Zhi Dao).
Improvement: large-value output improved in console.log().
Improvement: string output improved in console.log() in a compliant way (without escaping and quotes).
Improvement: using ES6 version of ToInt32(), ToUint32(), ToLength().

Changes with njs 0.3.0

Release Date: 26 March 2019

nginx modules:

Feature: added the js_path directive for http and stream.
Change: returning undefined value instead of empty strings for absent properties in the following objects: r.args{}, r.headersIn{}, r.headersOut{}, r.variables{}, s.variables{}.
Change: returning undefined value instead of throwing an exception for r.requestBody when request body is unavailable.
Bugfix: fixed crash while iterating over r.args{} when a value is absent in a key-value pair.

Core:

Feature: added initial ES6 modules support. Default import and default export statements are supported. Thanks to 洪志道 (Hong Zhi Dao).
Feature: added Object.prototype.propertyIsEnumerable().
Feature: reporting file name and function name in disassembler output.
Bugfix: fixed function redeclarations in interactive shell. Thanks to 洪志道 (Hong Zhi Dao).
Bugfix: fixed RegExp literals parsing.
Bugfix: fixed setting length of UTF8 string in fs.readFileSync().
Bugfix: fixed nxt_file_dirname() for paths with no dir component.

Changes with njs 0.2.8

Release Date: 26 February 2019

nginx modules:

Change: properties of HTTP request deprecated in 0.2.2 are removed.
Feature: added support for delete operation in r.headersOut{}.
Feature: added support for setting nginx variables.
Bugfix: fixed r.subrequest() for empty body value.
Improvement: setting special response headers in r.headersOut{}.

Core:

Feature: added labels support.
Feature: added setImmediate() method.
Feature: added support for shorthand property names for Object literals.
Bugfix: fixed Function.prototype.bind().
Bugfix: fixed parsing of string literals containing newline characters.
Bugfix: fixed line number in reporting variable reference errors.
Bugfix: fixed creation of long UTF8 strings.
Bugfix: fixed setting special response headers in String.prototype.split() for Unicode strings.
Bugfix: fixed heap-buffer-overflow in String.prototype.split().
Bugfix: fixed Array.prototype.fill(). Thanks to Artem S. Povalyukhin.
Improvement: code related to function invocation is refactored. Thanks to 洪志道 (Hong Zhi Dao).
Improvement: code related to variables is refactored. Thanks to 洪志道 (Hong Zhi Dao).
Improvement: parser is refactored. Thanks to 洪志道 (Hong Zhi Dao).
Improvement: reporting filenames in exceptions.

Changes with njs 0.2.7

Release Date: 25 December 2018

Core:

Feature: rest parameters syntax (destructuring is not supported). Thanks to Alexander Pyshchev.
Feature: added Object.entries() method.
Feature: added Object.values() method.
Improvement: code generator refactored and simplified.
Bugfix: fixed automatic semicolon insertion.
Bugfix: fixed assignment expression from compound assignment.
Bugfix: fixed comparison of Byte and UTF8 strings.
Bugfix: fixed type of iteration variable in for-in with array values.
Bugfix: fixed building on platforms without librt.
Bugfix: miscellaneous bugs have been fixed.

Changes with njs 0.2.6

Release Date: 27 November 2018

Core:

Feature: making built-in prototypes mutable.
Feature: making global object mutable.
Feature: console.time() and console.timeEnd() methods.
Feature: allowing variables and functions to be redeclared.
Feature: extending Object.defineProperty() spec conformance.
Feature: introduced quiet mode for CLI to handle simple expressions from stdin.
Feature: introduced compact form of backtraces to handle stack overflows.
Improvement: improved wording for various exceptions.
Bugfix: fixed closure values handling.
Bugfix: fixed equality operator for various value types.
Bugfix: fixed handling of this keyword in various scopes.
Bugfix: fixed handling non-object values in Object.keys().
Bugfix: fixed parsing of throw statement inside if statement.
Bugfix: fixed parsing of newline after throw statement.
Bugfix: fixed parsing of statements in if statement without newline.
Bugfix: fixed size uint32_t overflow in njs_array_expand().
Bugfix: fixed typeof operator for object_value type.
Bugfix: miscellaneous bugs have been fixed.

Changes with njs 0.2.5

Release Date: 30 October 2018

nginx modules:

Bugfix: fixed counting pending events in stream module.
Bugfix: fixed s.off() in stream module.
Bugfix: fixed processing of data chunks in js_filter in stream module.
Bugfix: fixed http status and contentType getter in http module.
Bugfix: fixed http response and parent getters in http module.

Core:

Feature: arguments object support.
Feature: non-integer fractions support.
Improvement: handling non-array values in Array.prototype.slice().
Bugfix: fixed Array.prototype.length setter
Bugfix: fixed njs_array_alloc() for length > 2**31.
Bugfix: handling int overflow in njs_array_alloc() on 32bit archs.
Bugfix: fixed code size mismatch error message.
Bugfix: fixed delete operator in a loop.
Bugfix: fixed Object.getOwnPropertyDescriptor() for complex object (inherited from Array and string values).
Bugfix: fixed Object.prototype.hasOwnProperty() for non-object properties
Bugfix: miscellaneous bugs have been fixed.

Changes with njs 0.2.4

Release Date: 18 September 2018

nginx modules:

Change: stream module handlers refactored.

New methods and properties: s.on(), s.off(), s.allow(), s.done(), s.decline(), s.deny().

Removed properties of the Stream object: s.OK, s.ABORT, s.AGAIN, s.DECLINED, s.ERROR (replaced with s.allow(), s.done(), s.deny()).

s.buffer (for reading replaced with data argument of the corresponding callback, for writing use s.send()).

s.fromUpstream (replaced with a callback for a corresponding event).

s.eof (replaced with flags.last).

Core:

Feature: added Function.prototype.length.
Feature: introduced sandboxing mode.
Improvement: added exception strings where appropriate.
Improvement: improved wording for primitive type conversion exception.
Bugfix: throwing TypeError for attempts to change frozen properties.
Bugfix: fixed Object.defineProperty() for existing properties.
Bugfix: respecting the enumerable attribute while iterating by for in.
Bugfix: respecting writable attribute for property handlers.
Bugfix: fixed exception handling in arguments of a function.
Bugfix: fixed Object.prototype.toString for different value types.
Bugfix: fixed Object() constructor for object types arguments.
Bugfix: fixed comparison of objects and strings.
Bugfix: fixed String.slice() for undefined arguments.
Bugfix: miscellaneous bugs have been fixed.

Changes with njs 0.2.3

Release Date: 31 July 2018

nginx modules:

Bugfix: making a subrequest from a Reply object caused a segmentation fault.
Bugfix: getting the parent property of the main HTTP Request object caused a segmentation fault.

Core:

Feature: added the pretty string representation for values.
Feature: correctly printing floating point numbers.
Feature: correctly parsing floating point numbers.
Feature: String.bytesFrom() method (decoding hex, base64, base64url into a byte string).
Feature: String.padStart() and String.padEnd() methods.
Feature: added support of binary literals.
Improvement: added information about illegal token in number parsing.
Improvement: allowed uppercased O in octal literal values.
Improvement: added support for multiple arguments in console.log().
Bugfix: fixed applying call() to methods of external values.
Bugfix: fixed addition operator applied to an object.
Bugfix: fixed exception handling in njs_vm_value_to_ext_string().
Bugfix: fixed Number() with boolean, null and undefined arguments.
Bugfix: fixed error handling of setting non-numeric Array.length.
Bugfix: fixed autocompletion for global objects.
Bugfix: miscellaneous bugs have been fixed.

Changes with njs 0.2.2

Release Date: 19 June 2018

nginx modules:

Change: merged HTTP Response and Reply into HTTP Request. New members of Request:
- req.status (res.status)
- req.parent (reply.parent)
- req.requestBody (req.body)
- req.responseBody (reply.body)
- req.headersIn (req.headers)
- req.headersOut (res.headers)
- req.sendHeader() (res.sendHeader())
- req.send() (res.send())
- req.finish() (res.finish())
- req.return() (res.return())
Deprecated members of Request:
- req.body (use req.requestBody or req.responseBody)
- req.headers (use req.headersIn or req.headersOut)
- req.response
Deprecated members of Response:
- res.contentLength (use req.headersOut ['Content-Length'])
- res.contentType (use req.headersOut ['Content-Type'])
The deprecated properties will be removed in next releases.
Feature: HTTP internalRedirect() method.

Core:

Bugfix: fixed heap-buffer-overflow in crypto.createHmac().

Changes with njs 0.2.1

Release Date: 31 May 2018

nginx modules:

Feature: HTTP request body getter.
Improvement: moved njs vm to the main configuration.
Improvement: improved logging for js_set and js_content directives.
Improvement: setting status code to 500 by default in the js_content handler
Improvement: added the debug for the returned status code in js_content handler
Bugfix: fixed error logging in js_include.

Core:

Feature: added array length setter.
Improvement: public header cleanup. njscript.h is renamed to njs.h.
Bugfix: fixed crypto update() method after digest() is called.
Bugfix: fixed crypto.createHmac() for keys with size <= alg size and > 64.
Bugfix: fixed JSON.stringify() for arrays with empty cells.
Bugfix: fixed exception type for unsupported types in JSON.stringify().
Bugfix: fixed handling of undefined arguments of functions.
Bugfix: fixed handling of missing arg of Object.getOwnPropertyDescriptor().
Bugfix: fixed handling of properties in Object.getOwnPropertyDescriptor().
Bugfix: fixed the writeable flag of Array.length property.
Bugfix: fixed return value type of clearTimeout().
Bugfix: fixed njs_vm_external_bind().
Bugfix: miscellaneous bugs have been fixed.

Changes with njs 0.2.0

Release Date: 03 April 2018

Feature: reporting njs version by CLI.
Feature: textual description for type converting exceptions.
Feature: setTimeout() and clearTimeout() methods.
Feature: Byte string to hex, base64, base64url encodings.
Feature: Node.js style Crypto methods.
Feature: HTTP and stream warn() and error() methods.
Feature: HTTP subrequest() method.
Feature: HTTP return() method.
Bugfix: miscellaneous bugs have been fixed in the core and interactive shell.

Changes with njs 0.1.15

Release Date: 20 November 2017

Feature: Error, EvalError, InternalError, RangeError, ReferenceError, SyntaxError, TypeError, URIError objects.
Feature: octal literals support.
Feature: Node.js style File system access methods: fs.readFile(), fs.readFileSync(), fs.appendFile(), fs.appendFileSync(), fs.writeFile(), fs.writeFileSync().
Feature: nginx modules print backtrace on exception.
Bugfix: miscellaneous bugs have been fixed.

Changes with njs 0.1.14

Release Date: 09 October 2017

Feature: JSON object.
Feature: object level completions in interactive shell.
Feature: various configure improvements.
Bugfix: miscellaneous bugs have been fixed in the core and interactive shell.

Changes with njs 0.1.13

Release Date: 31 August 2017

Feature: console.log() and console.help() methods in interactive shell.
Feature: interactive shell prints backtrace on exception.
Feature: interactive shell by default if libedit is available.
Bugfix: processing of large files from stdin in command line mode.
Bugfix: improved editline detection.

Changes with njs 0.1.12

Release Date: 08 August 2017

Feature: Interactive shell.
Bugfix: in Object.isSealed().

Changes with njs 0.1.11

Release Date: 27 June 2017

Feature: Object.keys(), Object.prototype.hasOwnProperty() methods.
Feature: Object.defineProperty(), Object.defineProperties(), Object.getOwnPropertyDescriptor() methods.
Feature: Object.getPrototypeOf(), Object.prototype.isPrototypeOf() methods.
Feature: Object.preventExtensions(), Object.isExtensible(), Object.freeze(), Object.isFrozen(), Object.seal(), Object.isSealed() methods.
Feature: scientific notation (3.35e10) literals support.
Feature: hexadecimal (0x1123) literals support.
Bugfix: processing of large array indexes.
Bugfix: in parseInt() and Date.parse().

Changes with njs 0.1.10

Release Date: 04 April 2017

Feature: nested functions and function closures.
Feature: Array.of(), Array.prototype.fill(), Array.prototype.find(), Array.prototype.findIndex() methods.
Bugfix: miscellaneous bugs and segmentation faults have been fixed.

Changes with njs 0.1.9

Release Date: 01 February 2017

Bugfix: global variables were not initialized when njs was used in nginx.

Changes with njs 0.1.8

Release Date: 24 January 2017

Change: the strict mode is enforced, variables must be explicitly declared.
Feature: for and for-in loops support variable declaration.
Bugfix: global and function scopes have been fixed.
Bugfix: now for-in loop does not discard the last value of property variable.
Bugfix: miscellaneous bugs and segmentation faults have been fixed.

Changes with njs 0.1.7

Release Date: 27 December 2016

Change: the js_include directive has been disabled at server and location levels.
Feature: exponentiation operators.
Bugfix: miscellaneous bugs and segmentation faults have been fixed.

Changes with njs 0.1.6

Release Date: 13 December 2016

Change: the js_set directive has been disabled at server and location levels.
Feature: ES6 Math methods.
Bugfix: miscellaneous bugs and segmentation faults have been fixed.