@SpiderMonkeyJS

SpiderMonkey is Mozilla’s JavaScript and WebAssembly Engine, used in Firefox, Servo and various other projects.

 @[email protected]
spidermonkey.dev
Joined March 2015
  • Tweets199
  • Following0
  • Followers2.5K
11Media
Last week we introduced what import maps are and how they work. This week Yoshi explores the feature in depth, in the second part of his two part series on Import maps. Read the blog post here: spidermonkey.dev/blog/2023/0…

JavaScript Import maps, Part 2: In-Depth Exploration

We recently shipped import maps in Firefox 108. you might be wondering what this new feature is and what problems it solves. In the previous post we introduced what import maps are and how they work,...

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Late last year, we implemented the Import Maps specification in Firefox. Yoshi (the engineer working on it) wrote an in-depth introduction to it, along with a deep dive that you can expect next week! Read the blog post here: spidermonkey.dev/blog/2023/0…

JavaScript Import maps, Part 1: Introduction

We recently shipped import maps in Firefox 108 and this article is the first in a series that describes what they are and the problems they can solve. In this first article, we will go through the...

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SpiderMonkey Newsletter (Firefox 106-107) spidermonkey.dev/blog/2022/1…

SpiderMonkey Newsletter (Firefox 106-107)

SpiderMonkey is the JavaScript engine used in Mozilla Firefox. This newsletter gives an overview of the JavaScript and WebAssembly work we’ve done as part of the Firefox 106 and 107 Nightly release...

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SpiderMonkey Newsletter (Firefox 104-105) (Mozilla JavasScript engine) spidermonkey.dev/blog/2022/0…

SpiderMonkey Newsletter (Firefox 104-105)

SpiderMonkey is the JavaScript engine used in Mozilla Firefox. This newsletter gives an overview of the JavaScript and WebAssembly work we’ve done as part of the Firefox 104 and 105 Nightly release...

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SpiderMonkey Newsletter (Firefox 102-103) spidermonkey.dev/blog/2022/0…

SpiderMonkey Newsletter (Firefox 102-103)

SpiderMonkey is the JavaScript engine used in Mozilla Firefox. This newsletter gives an overview of the JavaScript and WebAssembly work we’ve done as part of the Firefox 102 and 103 Nightly release...

spidermonkey.dev
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SpiderMonkey retweeted
yulia@codehag27 Jun 2022
Ecma International recently approved the 2022 standard of ECMAScript. But there is something new in this edition that hasn't been part of prior editions, and this isn't a new programming feature. 🧵 hacks.mozilla.org/2022/06/th…

The JavaScript Specification has a New License – Mozilla Hacks - the Web developer blog

As part of our work to ensure a free and open web, we've been working with Ecma International to write a License inspired by the W3C Document.

hacks.mozilla.org
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[Firefox JS engine] SpiderMonkey Newsletter spidermonkey.dev/blog/2022/0…

SpiderMonkey Newsletter (Firefox 98-99)

SpiderMonkey is the JavaScript engine used in Mozilla Firefox. This newsletter gives an overview of the JavaScript and WebAssembly work we’ve done as part of the Firefox 98 and 99 Nightly release...

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SpiderMonkey Newsletter (Firefox 96-97) spidermonkey.dev/blog/2022/0…

SpiderMonkey Newsletter (Firefox 96-97)

SpiderMonkey is the JavaScript engine used in Mozilla Firefox. This newsletter gives an overview of the JavaScript and WebAssembly work we’ve done as part of the Firefox 96 and 97 Nightly release...

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SpiderMonkey retweeted
Iain Ireland@Iainlreland8 Nov 2021
My team at Mozilla is hiring. Come write compilers with us! The Layout, DOM, and Media Playback teams are also looking for C++ programmers: careers.mozilla.org/position… Happy to answer questions if you're interested!
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SpiderMonkey retweeted
Firefox Beta@firefoxbeta9 Nov 2021
[JavaScript Engine] SpiderMonkey Newsletter (Firefox 94-95) spidermonkey.dev/blog/2021/1…

SpiderMonkey Newsletter (Firefox 94-95)

SpiderMonkey is the JavaScript engine used in Mozilla Firefox. This newsletter gives an overview of the JavaScript and WebAssembly work we’ve done as part of the Firefox 94 and 95 Nightly release...

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Following @codehag 's footsteps with #CompilerCompiler, this Firday 6pm CEST would be the first #ReverseEngineerSpidermonkey stream at twitch.tv/BackToTheCode. On the topic, the LifoAlloc allocator used to speed-up large number of allocations while reclaiming the memory quickly.

BackToTheCode - Twitch

Everybody can code! By reverse engineering existing code bases, we will challenge ourselves to understand what these code bases are doing.I am Nicolas B. Pierron, a compiler engineer working on...

twitch.tv
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SpiderMonkey Newsletter (Firefox 92-93) spidermonkey.dev/blog/2021/0…

SpiderMonkey Newsletter (Firefox 92-93)

SpiderMonkey is the JavaScript engine used in Mozilla Firefox. This newsletter gives an overview of the JavaScript and WebAssembly work we’ve done as part of the Firefox 92 and 93 Nightly release...

spidermonkey.dev
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I've finally setup my blog - dbezhetskov.dev/blog and there is a first post about SpiderMonkey and WASI (dbezhetskov.dev/blog/spiderm…)
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A lot of improvements landed in Firefox 90 and 91. Read about it in our latest newsletter: spidermonkey.dev/blog/2021/0…

SpiderMonkey Newsletter (Firefox 90-91)

SpiderMonkey is the JavaScript engine used in Mozilla Firefox. This newsletter gives an overview of the JavaScript and WebAssembly work we’ve done as part of the Firefox 90 and 91 Nightly release...

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SpiderMonkey retweeted
Rob Palmer@robpalmer213 Jul 2021
ECMAScript excitement 😉 Congrats to all those who contributed to today's release of Firefox 90 🎉 ⚡ Private Fields & Methods (Stage 4) ⚡ .at() for Arrays & Strings (Stage 3) ⚡ Ergonomic Brand Checks (Stage 3) ⚡ Intl.DateTimeFormat dayPeriod option
Firefox for Web Developers
@FirefoxWebDevs13 Jul 2021
Firefox 90 is here and this update has some nice JavaScript additions!🔥🦊 ✔️ Private fields and methods are now enabled by default 🏳️‍🌈 The 2D Canvas API has a new createConicGradient 🔒 A new version of SmartBlock hacks.mozilla.org/2021/07/ge…

Getting lively with Firefox 90 – Mozilla Hacks - the Web developer blog

This release we see nice JavaScript additions, including private fields and methods for classes, String and TypedArray global objects.

hacks.mozilla.org
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Our friends @SpiderMonkeyJS implemented the Error cause proposal in Firefox 91* (github.com/tc39/proposal-err…) The WebConsole displays this new cause property in error messages (and yes, you can have a chain of Error causes 🙂) * 91 will be Beta/DevEdition later this week
screenshot of Firefox WebConsole, with a snippet throwing a new Error with a cause property. The resulting error message in the console shows the Error and another line below starting with "Caused by:" and then the error that was passed as the cause

ALT screenshot of Firefox WebConsole, with a snippet throwing a new Error with a cause property. The resulting error message in the console shows the Error and another line below starting with "Caused by:" and then the error that was passed as the cause

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Just-In-Time (JIT) compilers are used in all major JavaScript engines to improve the speed, but how do they work? At Global Scope @nbpname will help us understand the principles of JIT compilation, and so how to optimize our code. buff.ly/3dkGzhL
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Language specification can be a bit of a mystery. At Global Scope, @codehag introduces the stages of the TC39 process for introducing a new language feature to JavaScript, and some high level concerns around our design process. buff.ly/3djR3OE
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SpiderMonkey retweeted
Mathias Bynens@mathias29 Jun 2021
Replying to @littledan @SpiderMonkeyJS @luke_wagner @codehag
Honestly, hiring John Howard for any JS engine swag design is now mandatory. The BaldrMonkey t-shirt is my favorite 🔥 monkeyink.com/ink/blog/archi…
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SpiderMonkey retweeted
Rob Palmer@robpalmer222 Jun 2021
ECMAScript excitement 😉 ES2021 has been approved by the Ecma General Assembly 🎉 💡 Logical Assignment Operators (&&= ||= ??=) 💡 Numeric Separators (1_000) 💡 Promise.any & AggregateError 💡 String.prototype.replaceAll 💡 WeakRefs & FinalizationRegistry
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