Media & Entertainment

BoltJS: Another Secret Piece Of Facebook’s Spartan Puzzle?

Comment

After a steady stream of information in June, all has been quiet on the Facebook Project Spartan front in recent weeks. Originally, at least some thought the plan was to unveil Spartan in July — but that obviously came and went. It’s certainly possible we won’t hear anything until f8 in late September now. But one new bit of information has come to our attention that could be related. Say hello to BoltJS.

BoltJS is a UI framework that’s being built by Facebook for the purpose “helping developers build fantastic mobile web applications in HTML5 and Javascript,” as you can read for yourself here. It is written entirely in JavaScript and runs in the browser, meaning no backend processing is required. And guess where the focus of the project lies right now: mobile WebKit browsers — just like Project Spartan.

Here’s the description in developer Shane O’Sullivan’s own words from the project’s GitHub page:

BoltJS is a UI framework designed by Facebook to be compact, fast and powerful. It is written entirely in JavaScript and runs in the browser, needing no server backend. While BoltJS can be used in a progressive enhancement approach, it is primarily designed for UIs that are built mostly, if not completely, in the browser.

While it is the aim of the BoltJS project to support as many modern browsers as sensible, it is currently focused on supporting mobile WebKit browsers, with the intention of being the best possible development platform for mobile sites and HTML5 apps.

O’Sullivan is a software engineer at Facebook on the Client UI team. The other authors of the project are Will Bailey, Vlad Kolesnikov, and Tom Occhino.

BoltJS is built on top of Javelin, and plays nicely with Facebook’s current code, O’Sullivan notes. It also features modules that use the CommonJS standard. For all the other technical details, check out the GitHub docs page.

But here are a few other interesting things about the project. First, Facebook doesn’t seem to want to say a word about it. I asked them about it several hours ago after a back and forth about something else. So far, nada in response to this. That’s not surprising given what I’ve been told about BoltJS — namely that it’s still meant to be a secret.

While the documentation does reside on GitHub, the source code hasn’t been released to the public yet. The links on this page to the zip and tar source files don’t work. But I’m told that BoltJS is already being licensed secretly to third parties who are preparing apps to show off using the platform. At least one of those third parties is a major player in the consumer web space. Again, this sounds a lot like Spartan.

Also found on GitHub is a demo app built using BoltJS called “Weather App“. If it looks familiar, it’s because you own an iPhone. It is essentially the Weather app re-created using the JavaScript framework. Still think Facebook doesn’t intend to battle with Apple in mobile down the road?…

That’s all for now. More as we get it.

Update: As Holger Eilhard notes on Twitter, Google’s cache catches several other BoltJS examples that are no longer live. Among them: a few maze games.

More TechCrunch

The European venture capital firm raised its fourth fund as fund as climate tech “comes of age.”

ETF Partners raises €284M for climate startups that will be effective quickly — not 20 years down the road

Copilot, Microsoft’s brand of generative AI, will soon be far more deeply integrated into the Windows 11 experience.

Microsoft wants to make Windows an AI operating system, launches Copilot+ PCs

“When I heard the released demo, I was shocked, angered and in disbelief that Mr. Altman would pursue a voice that sounded so eerily similar to mine.”

Scarlett Johansson says that OpenAI approached her to use her voice

Hello and welcome back to TechCrunch Space. For those who haven’t heard, the first crewed launch of Boeing’s Starliner capsule has been pushed back yet again to no earlier than…

TechCrunch Space: Star(side)liner

When I attended Automate in Chicago a few weeks back, multiple people thanked me for TechCrunch’s semi-regular robotics job report. It’s always edifying to get that feedback in person. While…

These 81 robotics companies are hiring

The top vehicle safety regulator in the U.S. has launched a formal probe into an April crash involving the all-electric VinFast VF8 SUV that claimed the lives of a family…

VinFast crash that killed family of four now under federal investigation

When putting a video portal in a public park in the middle of New York City, some inappropriate behavior will likely occur. The Portal, the vision of Lithuanian artist and…

NYC-Dublin real-time video portal reopens with some fixes to prevent inappropriate behavior

Longtime New York-based seed investor, Contour Venture Partners, is making progress on its latest flagship fund after lowering its target. The firm closed on $42 million, raised from 64 backers,…

Contour Venture Partners, an early investor in Datadog and Movable Ink, lowers the target for its fifth fund

Meta’s Oversight Board has now extended its scope to include the company’s newest platform, Instagram Threads, and has begun hearing cases from Threads.

Meta’s Oversight Board takes its first Threads case

The company says it’s refocusing and prioritizing fewer initiatives that will have the biggest impact on customers and add value to the business.

SeekOut, a recruiting startup last valued at $1.2 billion, lays off 30% of its workforce

The U.K.’s self-proclaimed “world-leading” regulations for self-driving cars are now official, after the Automated Vehicles (AV) Act received royal assent — the final rubber stamp any legislation must go through…

UK’s autonomous vehicle legislation becomes law, paving the way for first driverless cars by 2026

ChatGPT, OpenAI’s text-generating AI chatbot, has taken the world by storm. What started as a tool to hyper-charge productivity through writing essays and code with short text prompts has evolved…

ChatGPT: Everything you need to know about the AI-powered chatbot

SoLo Funds CEO Travis Holoway: “Regulators seem driven by press releases when they should be motivated by true consumer protection and empowering equitable solutions.”

Fintech lender SoLo Funds is being sued again by the government over its lending practices

Hard tech startups generate a lot of buzz, but there’s a growing cohort of companies building digital tools squarely focused on making hard tech development faster, more efficient and —…

Rollup wants to be the hardware engineer’s workhorse

TechCrunch Disrupt 2024 is not just about groundbreaking innovations, insightful panels, and visionary speakers — it’s also about listening to YOU, the audience, and what you feel is top of…

Disrupt Audience Choice vote closes Friday

Google says the new SDK would help Google expand on its core mission of connecting the right audience to the right content at the right time.

Google is launching a new Android feature to drive users back into their installed apps

Jolla has taken the official wraps off the first version of its personal server-based AI assistant in the making. The reborn startup is building a privacy-focused AI device — aka…

Jolla debuts privacy-focused AI hardware

The ChatGPT mobile app’s net revenue first jumped 22% on the day of the GPT-4o launch and continued to grow in the following days.

ChatGPT’s mobile app revenue saw its biggest spike yet following GPT-4o launch

Dating app maker Bumble has acquired Geneva, an online platform built around forming real-world groups and clubs. The company said that the deal is designed to help it expand its…

Bumble buys community building app Geneva to expand further into friendships

CyberArk — one of the army of larger security companies founded out of Israel — is acquiring Venafi, a specialist in machine identity, for $1.54 billion. 

CyberArk snaps up Venafi for $1.54B to ramp up in machine-to-machine security

Founder-market fit is one of the most crucial factors in a startup’s success, and operators (someone involved in the day-to-day operations of a startup) turned founders have an almost unfair advantage…

OpenseedVC, which backs operators in Africa and Europe starting their companies, reaches first close of $10M fund

A Singapore High Court has effectively approved Pine Labs’ request to shift its operations to India.

Pine Labs gets Singapore court approval to shift base to India

The AI Safety Institute, a U.K. body that aims to assess and address risks in AI platforms, has said it will open a second location in San Francisco. 

UK opens office in San Francisco to tackle AI risk

Companies are always looking for an edge, and searching for ways to encourage their employees to innovate. One way to do that is by running an internal hackathon around a…

Why companies are turning to internal hackathons

Featured Article

I’m rooting for Melinda French Gates to fix tech’s broken ‘brilliant jerk’ culture

Women in tech still face a shocking level of mistreatment at work. Melinda French Gates is one of the few working to change that.

1 day ago
I’m rooting for Melinda French Gates to fix tech’s  broken ‘brilliant jerk’ culture

Blue Origin has successfully completed its NS-25 mission, resuming crewed flights for the first time in nearly two years. The mission brought six tourist crew members to the edge of…

Blue Origin successfully launches its first crewed mission since 2022

Creative Artists Agency (CAA), one of the top entertainment and sports talent agencies, is hoping to be at the forefront of AI protection services for celebrities in Hollywood. With many…

Hollywood agency CAA aims to help stars manage their own AI likenesses

Expedia says Rathi Murthy and Sreenivas Rachamadugu, respectively its CTO and senior vice president of core services product & engineering, are no longer employed at the travel booking company. In…

Expedia says two execs dismissed after ‘violation of company policy’

Welcome back to TechCrunch’s Week in Review. This week had two major events from OpenAI and Google. OpenAI’s spring update event saw the reveal of its new model, GPT-4o, which…

OpenAI and Google lay out their competing AI visions

When Jeffrey Wang posted to X asking if anyone wanted to go in on an order of fancy-but-affordable office nap pods, he didn’t expect the post to go viral.

With AI startups booming, nap pods and Silicon Valley hustle culture are back