Explaining React’s license
A few weeks ago, the Apache Software Foundation (the ASF) made a decision to list the BSD + Patents license as a Category-X license. This move affects users of much of Facebook’s open source software, but especially the popular React project and the constellation of projects around it. As a result, many have asked us to consider relicensing React and all of our other open source projects. What has
Reflex: Reactive Programming at Facebook | Curry On Barcelona! 2017
Abstract Reflex is a new programming language for reactive programming developed at Facebook. It has many interesting characteristics, mixing OO and functional programming, it allows rapid development of applications with “spreadsheet semantics”.
開発者向け動画 | Facebook for Developers
Facebookによるさまざまな開発者向け動画と最新情報を紹介します。AI、App Events、FbStartなどについての動画を視聴できます。
Building virtual reality experiences on the web with React VR
Building virtual reality experiences on the web with React VR Over the past year, virtual reality has made major strides toward becoming the next computing platform. With Oculus Rift, consumer-grade hardware has reached the point where people can immerse themselves in virtual worlds from their own home. Alongside that, 360 content has blossomed with the introduction of numerous consumer-level came
Open-sourcing Litho, a declarative UI framework for Android
Open-sourcing Litho, a declarative UI framework for Android One challenge in Android development is achieving smooth UI performance. Developers can spend a lot of time optimizing, squeezing out every bit of speed from their UI code, and yet still experience lag and dropped frames in complex scenarios. At Facebook, this problem is relevant to us because more than 1 billion people use our app on And
Litho
DeclarativeLitho uses a declarative API to define UI components. You simply describe the layout for your UI based on a set of immutable inputs and the framework takes care of the rest. With code generation, Litho can perform optimisations for your UI under the hood, while keeping your code simple and easy to maintain. Asynchronous layoutLitho can measure and layout your UI ahead of time without bl
Yoga Layout | A cross-platform layout engine
Open Source AdoptionYoga already powers widely used open source frameworks. It enables these frameworks to offer a simple and intuitive layout API that allows for engineers to collaborate more easily across platforms. Yoga has unlocked exciting features such as calculating layouts off of the main thread to help ensure smooth UI performance. Why You May Consider YogaPERFORMANCEYoga was built to be
Client-side ranking to more efficiently show people stories in feed
Client-side ranking to more efficiently show people stories in feed Our mission with News Feed is to connect people with the stories that matter most to them. For people on slower internet connections, we are focusing on ways to more efficiently rank and render relevant stories without having to wait on the network to return results. Last December, we published a blog post about our efforts to imp
Improving CSS quality at Facebook and beyond
With thousands of engineers working across a range of products at Facebook, we face some unique challenges when it comes to code quality. Not only are we dealing with a large codebase, but things are also moving fast — new features are being added, existing ones are being improved, and things are being reorganized. For CSS, this means having thousands of files that are in a continuous state of flu
Documentation | reason
Documentation This directory is not the Reason User documentation. This directory is for Reason contributor documentation. The Reason user docs live online at https://reasonml.github.io. The repo for those Reason docs lives at github.com/reasonml/reasonml.github.io Inside of this directory: Getting Started Contributing: GETTING_STARTED_CONTRIBUTING.md. Releasing: RELEASING.md Programmatically Usin
Why Invest in Tools?
Photo: Rasmus AnderssonA few days ago I got to share GraphQL at the React-Europe conference, a project I’ve been working on for over three years at Facebook. After this talk, multiple attendees of the conference asked me how Facebook is able to consistently produce new technology that “rethinks current best practices” which succeeds in altering the way we build software as an industry. This was a
JavaScript Unit Testing Performance · Jest
Jest is running thousands of tests at Facebook at all times, either through continuous integration or invoked by engineers manually during development. This worked well for years even as the people working on Jest moved on to other projects within Facebook. As engineers added more and more tests though, we noticed the performance of Jest wasn't going to scale. Additionally, in the last year the Ja
How we built Facebook Lite for every Android phone and network
How we built Facebook Lite for every Android phone and network We rolled out Facebook Lite, our version of Facebook for Android built for emerging markets, in June of 2015. Today we’re excited to share that the app has hit 100 million monthly active users. It’s the fastest-growing version of Facebook to reach 100 million users in under nine months. It has an APK that is less than 1 MB in size, mea
FP @ FB
Bad actors on the internet The attack landscape is constantly evolving: Fake accounts, account cloning Social engineering Hacked accounts posting spam Malicious browser extensions …and many more Why does spam appear to be “solved”? Massive automation Fast engineering triage of breaking attacks Continuous deployment of code to respond Fighting spam at Facebook Sigma is a rule execution engine Every
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GitHub - facebook/fbjs: A collection of utility libraries used by other Meta JS projects.
To make it easier for Facebook to share and consume our own JavaScript. Primarily this will allow us to ship code without worrying too much about where it lives, keeping with the spirit of @providesModule but working in the broader JavaScript ecosystem. For more information on how to build and use FBJS, click here. This library includes a number of packages that can be accessed in the packages fol
Updating Our Open Source Patent Grant
At Facebook, we strive to open source innovative, world-class software. These are the same technologies that we ourselves use in production, and we strive to ensure that developers feel comfortable about their quality. But we also know that there are other things people look at when choosing to use or build on open source software projects, such as their licenses and terms of use. We default to us
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