Boa (JavaScript engine) - Revision history

WikiMasterBot2: remove duplicates internal links

2026-07-24T03:38:26Z

remove duplicates internal links

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	'''Boa''' is an [[open-source]] [[JavaScript ~~engine\|JavaScript]]~~ engine written in Rust.<ref name="boa-about" /> Boa was introduced at JSConf EU 2019 by Jason Williams.<ref name="boa-talk">{{cite web \|last1=Williams \|first1=Jason \|title=Let's build a JavaScript Engine in Rust by Jason Williams - JSConf EU 2019 \|url=https://www.youtube.com/watch?v=_uD2pijcSi4 \|website=YouTube \|publisher=JS Conf EU \|access-date=15 October 2024 \|date=20 June 2019}}</ref><ref name="jsonconf-eu">{{cite web \|author1=Jason Williams \|title=Let's build a JavaScript Engine \|url=https://2019.jsconf.eu/jason-williams/lets-build-a-javascript-engine.html \|website=2019.jsconf.eu \|publisher=JS Conf EU \|access-date=25 February 2024 \|archive-url=https://web.archive.org/web/20240225094308/https://2019.jsconf.eu/jason-williams/lets-build-a-javascript-engine.html \|archive-date=25 February 2024 \|language=en}}</ref>		'''Boa''' is an [[open-source]] JavaScript engine written in Rust.<ref name="boa-about" /> Boa was introduced at JSConf EU 2019 by Jason Williams.<ref name="boa-talk">{{cite web \|last1=Williams \|first1=Jason \|title=Let's build a JavaScript Engine in Rust by Jason Williams - JSConf EU 2019 \|url=https://www.youtube.com/watch?v=_uD2pijcSi4 \|website=YouTube \|publisher=JS Conf EU \|access-date=15 October 2024 \|date=20 June 2019}}</ref><ref name="jsonconf-eu">{{cite web \|author1=Jason Williams \|title=Let's build a JavaScript Engine \|url=https://2019.jsconf.eu/jason-williams/lets-build-a-javascript-engine.html \|website=2019.jsconf.eu \|publisher=JS Conf EU \|access-date=25 February 2024 \|archive-url=https://web.archive.org/web/20240225094308/https://2019.jsconf.eu/jason-williams/lets-build-a-javascript-engine.html \|archive-date=25 February 2024 \|language=en}}</ref>

	Williams created Boa in 2017 after working on [[Servo (software)\|Servo]] and being inspired by the "written from scratch" CSS engine.<ref>{{cite web \|title=Hacking & Contributing to Servo On Windows – Mozilla Hacks - the Web developer blog \|url=https://hacks.mozilla.org/2017/04/hacking-contributing-to-servo-on-windows/ \|website=Mozilla Hacks – the Web developer blog}}</ref><ref name="jsonconf-eu" /> He was eager to work on a JavaScript engine using Rust to learn more about how JavaScript implementations work, since then the project has had over 100 contributors.<ref name="boa-talk" /><ref>{{cite web \|title=Contributors to boa-dev/boa \|url=https://github.com/boa-dev/boa/graphs/contributors \|website=GitHub \|language=en}}</ref> Over time the engine gained more prominent features such as [[bytecode]] compilation,<ref>{{cite web \|title=Boa release v0.14 \|url=https://boajs.dev/blog/2022/03/15/boa-release-14 \|website=boajs.dev \|language=en \|date=15 March 2022}}</ref> better conformance to the specification and ergonomic API design.<ref name="latest-release" />		Williams created Boa in 2017 after working on [[Servo (software)\|Servo]] and being inspired by the "written from scratch" CSS engine.<ref>{{cite web \|title=Hacking & Contributing to Servo On Windows – Mozilla Hacks - the Web developer blog \|url=https://hacks.mozilla.org/2017/04/hacking-contributing-to-servo-on-windows/ \|website=Mozilla Hacks – the Web developer blog}}</ref><ref name="jsonconf-eu" /> He was eager to work on a JavaScript engine using Rust to learn more about how JavaScript implementations work, since then the project has had over 100 contributors.<ref name="boa-talk" /><ref>{{cite web \|title=Contributors to boa-dev/boa \|url=https://github.com/boa-dev/boa/graphs/contributors \|website=GitHub \|language=en}}</ref> Over time the engine gained more prominent features such as [[bytecode]] compilation,<ref>{{cite web \|title=Boa release v0.14 \|url=https://boajs.dev/blog/2022/03/15/boa-release-14 \|website=boajs.dev \|language=en \|date=15 March 2022}}</ref> better conformance to the specification and ergonomic API design.<ref name="latest-release" />

WikiMasterBot2: automatic correction by IA

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	~~{{Notability\|date=October 2024}}~~
	{{Infobox software		{{Infobox software
	\| name = Boa		\| name = Boa
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	\| latest release version = v0.20<ref name="latest-release">{{cite web \|title=Boa release v0.19 \|url=https://boajs.dev/blog/2024/12/05/boa-release-020 \|website=boajs.dev \|language=en \|date=5 December 2024}}</ref> / {{start date and age\|2024\|12\|5\|df=y}}		\| latest release version = v0.20<ref name="latest-release">{{cite web \|title=Boa release v0.19 \|url=https://boajs.dev/blog/2024/12/05/boa-release-020 \|website=boajs.dev \|language=en \|date=5 December 2024}}</ref> / {{start date and age\|2024\|12\|5\|df=y}}
	\| latest release date = {{start date and age\|{{wikidata\|qualifier\|single\|P548=Q2804309\|P348\|P577}}}}		\| latest release date = {{start date and age\|{{wikidata\|qualifier\|single\|P548=Q2804309\|P348\|P577}}}}
	\| programming language = [[Rust_(programming_language)\|Rust]]<ref name="boa-about">{{cite web \|title=About Boa {{!}} Boa JS \|url=https://boajs.dev/about \|website=boajs.dev \|publisher=Boa Developers \|access-date=15 October 2024 \|language=en}}</ref>		\| programming language = [[Rust_(programming_language)\|Rust]]<ref name="boa-about">{{cite web \|title=About Boa {{!}} Boa JS \|url=https://boajs.dev/about \|website=boajs.dev \|publisher=Boa Developers \|access-date=15 October 2024 \|language=en \|date=15 October 2024}}</ref>
	\| platform = [[x86-64]], [[ARM architecture\|32-bit ARM]], [[AArch64]]		\| platform = [[x86-64]], [[ARM architecture\|32-bit ARM]], [[AArch64]]
	\| genre = [[JavaScript engine\|JavaScript]]		\| genre = [[JavaScript engine\|JavaScript]]
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	'''Boa''' is an [[open-source]] [[JavaScript engine\|JavaScript]] engine written in Rust.<ref name="boa-about" /> Boa was introduced at JSConf EU 2019 by Jason Williams.<ref name="boa-talk">{{cite web \|last1=Williams \|first1=Jason \|title=Let's build a JavaScript Engine in Rust by Jason Williams - JSConf EU 2019 \|url=https://www.youtube.com/watch?v=_uD2pijcSi4 \|website=YouTube \|publisher=JS Conf EU \|access-date=15 October 2024 \|date=20 June 2019}}</ref><ref name="jsonconf-eu">{{cite web \|author1=Jason Williams \|title=Let's build a JavaScript Engine \|url=https://2019.jsconf.eu/jason-williams/lets-build-a-javascript-engine.html \|website=2019.jsconf.eu \|publisher=JS Conf EU \|access-date=25 February 2024 \|archive-url=https://web.archive.org/web/20240225094308/https://2019.jsconf.eu/jason-williams/lets-build-a-javascript-engine.html \|archive-date=25 February 2024 \|language=en}}</ref>		'''Boa''' is an [[open-source]] [[JavaScript engine\|JavaScript]] engine written in Rust.<ref name="boa-about" /> Boa was introduced at JSConf EU 2019 by Jason Williams.<ref name="boa-talk">{{cite web \|last1=Williams \|first1=Jason \|title=Let's build a JavaScript Engine in Rust by Jason Williams - JSConf EU 2019 \|url=https://www.youtube.com/watch?v=_uD2pijcSi4 \|website=YouTube \|publisher=JS Conf EU \|access-date=15 October 2024 \|date=20 June 2019}}</ref><ref name="jsonconf-eu">{{cite web \|author1=Jason Williams \|title=Let's build a JavaScript Engine \|url=https://2019.jsconf.eu/jason-williams/lets-build-a-javascript-engine.html \|website=2019.jsconf.eu \|publisher=JS Conf EU \|access-date=25 February 2024 \|archive-url=https://web.archive.org/web/20240225094308/https://2019.jsconf.eu/jason-williams/lets-build-a-javascript-engine.html \|archive-date=25 February 2024 \|language=en}}</ref>

	Williams created Boa in 2017 after working on [[Servo (software)\|Servo]] and being inspired by the "written from scratch" CSS engine.<ref>{{cite web \|title=Hacking & Contributing to Servo On Windows – Mozilla Hacks - the Web developer blog \|url=https://hacks.mozilla.org/2017/04/hacking-contributing-to-servo-on-windows/ \|website=Mozilla Hacks – the Web developer blog}}</ref><ref name="jsonconf-eu" /> He was eager to work on a JavaScript engine using Rust to learn more about how JavaScript implementations work, since then the project has had over 100 contributors.<ref name="boa-talk" /><ref>{{cite web \|title=Contributors to boa-dev/boa \|url=https://github.com/boa-dev/boa/graphs/contributors \|website=GitHub \|language=en}}</ref> Over time the engine gained more prominent features such as [[bytecode]] compilation,<ref>{{cite web \|title=Boa release v0.14 \|url=https://boajs.dev/blog/2022/03/15/boa-release-14 \|website=boajs.dev \|language=en \|date=15 March 2022}}</ref> better conformance to the specification and ergonomic API design.<ref name="latest-release" />		Williams created Boa in 2017 after working on [[Servo (software)\|Servo]] and being inspired by the "written from scratch" CSS engine.<ref>{{cite web \|title=Hacking & Contributing to Servo On Windows – Mozilla Hacks - the Web developer blog \|url=https://hacks.mozilla.org/2017/04/hacking-contributing-to-servo-on-windows/ \|website=Mozilla Hacks – the Web developer blog}}</ref><ref name="jsonconf-eu" /> He was eager to work on a JavaScript engine using Rust to learn more about how JavaScript implementations work, since then the project has had over 100 contributors.<ref name="boa-talk" /><ref>{{cite web \|title=Contributors to boa-dev/boa \|url=https://github.com/boa-dev/boa/graphs/contributors \|website=GitHub \|language=en}}</ref> Over time the engine gained more prominent features such as [[bytecode]] compilation,<ref>{{cite web \|title=Boa release v0.14 \|url=https://boajs.dev/blog/2022/03/15/boa-release-14 \|website=boajs.dev \|language=en \|date=15 March 2022}}</ref> better conformance to the specification and ergonomic API design.<ref name="latest-release" />

	==Design==		==Design==
	Boa is an open-source implementation of a JavaScript execution engine. The project is developed as a Rust library for embedding the JavaScript engine in Rust applications. Additionally, the authors of Boa provide a command-line interface (CLI) for users to interact with Boa as standalone JavaScript interpreter accessible from a command line.<ref name="boaspect">{{cite web \|last1=Munsters \|first1=Aäron \|title=BoaSpect \|url=http://soft.vub.ac.be/Publications/2022/vub-soft-ms-22-01.pdf \|publisher=Vrije Universiteit Brussel \|access-date=15 October 2024}}</ref>		Boa is an open-source implementation of a JavaScript execution engine. The project is developed as a Rust library for embedding the JavaScript engine in Rust applications. Additionally, the authors of Boa provide a command-line interface (CLI) for users to interact with Boa as a standalone JavaScript interpreter accessible from a command line.<ref name="boaspect">{{cite web \|last1=Munsters \|first1=Aäron \|title=BoaSpect \|url=http://soft.vub.ac.be/Publications/2022/vub-soft-ms-22-01.pdf \|publisher=Vrije Universiteit Brussel \|access-date=15 October 2024}}</ref>

	Boa follows the common interpreter design which approximately consists of a [[lexer]], [[parser]], [[compiler]] and [[bytecode interpreter]]<ref name="boaspect" />		Boa follows the common interpreter design which approximately consists of a [[lexer]], [[parser]], [[compiler]] and [[bytecode interpreter]]<ref name="boaspect" />

WikiMasterBot2: Moved page from wikipedia:en:Boa (JavaScript engine) (history)

2025-09-27T19:21:25Z

Moved page from wikipedia:en:Boa (JavaScript engine) ([[Edithistory:|history]])

← Older revision		Revision as of 19:21, 27 September 2025
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	==Standards==		==Standards==
	Boa implements the ECMA-262 specification ([[ECMAScript]]). As of 17th August 2025 Boa has 94.6% conformance to Test262<ref>{{cite web \|title=test262.fyi \|url=https://test262.fyi \|website=test262.fyi \|access-date=6 September 2024 \|archive-url= https://web.archive.org/web/20250817204840/https://test262.fyi/ \|archive-date=17 August 2025 \|date=17 August 2025}}</ref>		Boa implements the ECMA-262 specification ([[ECMAScript]]). As of 17th August 2025 Boa has 94.6% conformance to Test262<ref>{{cite web \|title=test262.fyi \|url=https://test262.fyi \|website=test262.fyi \|access-date=6 September 2024 \|archive-url= https://web.archive.org/web/20250817204840/https://test262.fyi/ \|archive-date=17 August 2025 \|date=17 August 2025}}</ref>

			=== Temporal ===
			In September 24th 2025 Boa launched Temporal_rs, a library which implements the Temporal proposal in ECMAScript.<ref>{{Cite web \|date=2025-09-24 \|title=Temporal_rs is here! The datetime library powering Temporal in Boa, Kiesel, and V8 {{!}} Boa JS \|url=https://boajs.dev/blog/2025/09/24/temporal-release \|access-date=2025-09-27 \|website=boajs.dev \|language=en}}</ref> This implementation is used within the [[V8 (JavaScript engine)]] making it the first piece of Rust code which V8 have integrated.<ref>{{Cite web \|title=Chrome Platform Status \|url=https://chromestatus.com/feature/5668291307634688 \|access-date=2025-09-27 \|website=chromestatus.com}}</ref><ref>{{Cite web \|date=2 June 2025 \|title=Cross-Engine Contributions at Scale: How newcomers accelerated Temporal and Upsert in SpiderMonkey, V8, and Boa \|url=https://webengineshackfest.org/slides/cross-engine_contributions_at_scale:_how_newcomers_accelerated_temporal_and_upsert_in_spidermonkey,_v8,_and_boa_by_jonas_haukenes,_mikhail_barash_&_shane_carr.pdf \|website=Web Engines Hackfest}}</ref>

	==See also==		==See also==

WikiMasterBot2: Moved page from wikipedia:en:Boa (JavaScript engine) (history)

2025-09-21T08:17:28Z

Moved page from wikipedia:en:Boa (JavaScript engine) ([[Edithistory:|history]])

New page

{{Notability|date=October 2024}}
{{Infobox software
| name = Boa
| logo = Boa logo in black.svg
| logo size = 64px
| screenshot =
| developer = Boa Developers
| caption =
| author = [https://jason-williams.co.uk Jason Williams]
| released = {{start date and age|2019|6|10|df=y}}
| latest release version = v0.20<ref name="latest-release">{{cite web |title=Boa release v0.19 |url=https://boajs.dev/blog/2024/12/05/boa-release-020 |website=boajs.dev |language=en |date=5 December 2024}}</ref> / {{start date and age|2024|12|5|df=y}}
| latest release date = {{start date and age|{{wikidata|qualifier|single|P548=Q2804309|P348|P577}}}}
| programming language = [[Rust_(programming_language)|Rust]]<ref name="boa-about">{{cite web |title=About Boa {{!}} Boa JS |url=https://boajs.dev/about |website=boajs.dev |publisher=Boa Developers |access-date=15 October 2024 |language=en}}</ref>
| platform = [[x86-64]], [[ARM architecture|32-bit ARM]], [[AArch64]]
| genre = [[JavaScript engine|JavaScript]]
| license = [[MIT_License|MIT]]
| website = {{URL|https://boajs.dev}}
| repo = {{URL|https://github.com/boa-dev/boa}}
}}

'''Boa''' is an [[open-source]] [[JavaScript engine|JavaScript]] engine written in Rust.<ref name="boa-about" /> Boa was introduced at JSConf EU 2019 by Jason Williams.<ref name="boa-talk">{{cite web |last1=Williams |first1=Jason |title=Let's build a JavaScript Engine in Rust by Jason Williams - JSConf EU 2019 |url=https://www.youtube.com/watch?v=_uD2pijcSi4 |website=YouTube |publisher=JS Conf EU |access-date=15 October 2024 |date=20 June 2019}}</ref><ref name="jsonconf-eu">{{cite web |author1=Jason Williams |title=Let's build a JavaScript Engine |url=https://2019.jsconf.eu/jason-williams/lets-build-a-javascript-engine.html |website=2019.jsconf.eu |publisher=JS Conf EU |access-date=25 February 2024 |archive-url=https://web.archive.org/web/20240225094308/https://2019.jsconf.eu/jason-williams/lets-build-a-javascript-engine.html |archive-date=25 February 2024 |language=en}}</ref>

Williams created Boa in 2017 after working on [[Servo (software)|Servo]] and being inspired by the "written from scratch" CSS engine.<ref>{{cite web |title=Hacking & Contributing to Servo On Windows – Mozilla Hacks - the Web developer blog |url=https://hacks.mozilla.org/2017/04/hacking-contributing-to-servo-on-windows/ |website=Mozilla Hacks – the Web developer blog}}</ref><ref name="jsonconf-eu" /> He was eager to work on a JavaScript engine using Rust to learn more about how JavaScript implementations work, since then the project has had over 100 contributors.<ref name="boa-talk" /><ref>{{cite web |title=Contributors to boa-dev/boa |url=https://github.com/boa-dev/boa/graphs/contributors |website=GitHub |language=en}}</ref> Over time the engine gained more prominent features such as [[bytecode]] compilation,<ref>{{cite web |title=Boa release v0.14 |url=https://boajs.dev/blog/2022/03/15/boa-release-14 |website=boajs.dev |language=en |date=15 March 2022}}</ref> better conformance to the specification and ergonomic API design.<ref name="latest-release" />

==Design==
Boa is an open-source implementation of a JavaScript execution engine. The project is developed as a Rust library for embedding the JavaScript engine in Rust applications. Additionally, the authors of Boa provide a command-line interface (CLI) for users to interact with Boa as standalone JavaScript interpreter accessible from a command line.<ref name="boaspect">{{cite web |last1=Munsters |first1=Aäron |title=BoaSpect |url=http://soft.vub.ac.be/Publications/2022/vub-soft-ms-22-01.pdf |publisher=Vrije Universiteit Brussel |access-date=15 October 2024}}</ref>

Boa follows the common interpreter design which approximately consists of a [[lexer]], [[parser]], [[compiler]] and [[bytecode interpreter]]<ref name="boaspect" />

==Standards==
Boa implements the ECMA-262 specification ([[ECMAScript]]). As of 17th August 2025 Boa has 94.6% conformance to Test262<ref>{{cite web |title=test262.fyi |url=https://test262.fyi |website=test262.fyi |access-date=6 September 2024 |archive-url= https://web.archive.org/web/20250817204840/https://test262.fyi/ |archive-date=17 August 2025 |date=17 August 2025}}</ref>

==See also==
{{Portal|Free and open-source software|Internet}}
* [[JerryScript]], an ultra-lightweight JavaScript engine
* [[SpiderMonkey]], a JavaScript engine used in Firefox
* [[List_of_ECMAScript_engines|List Of ECMAScript engines]]

==References==
{{Reflist|30em}}

[[Category:2017 software]]
[[Category:Free software programmed in Rust]]
[[Category:JavaScript engines]]
[[Category:Software using the MIT license]]
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