Tags: files

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Monday, November 11th, 2019

JavaScript | 2019 | The Web Almanac by HTTP Archive

It’s time for a look at the state of the web when it comes to JavaScript usage. Here’s the report powered by data from HTTP Archive:

JavaScript is the most costly resource we send to browsers; having to be downloaded, parsed, compiled, and finally executed. Although browsers have significantly decreased the time it takes to parse and compile scripts, download and execution have become the most expensive stages when JavaScript is processed by a web page.

Sending smaller JavaScript bundles to the browser is the best way to reduce download times, and in turn improve page performance. But how much JavaScript do we really use?

When it comes to frameworks and UI libraries, there are some interesting numbers. Given the volume of chatter in the dev world, you’d be forgiven for thinking that React is used on the majority of websites today. The real number? 4.6% of websites. That’s less than the number of websites using CSS custom properties.

This is reminding me of what I wrote about dev perception.

Sunday, November 10th, 2019

Everything is Amazing, But Nothing is Ours – alexdanco.com

Worlds of scarcity are made out of things. Worlds of abundance are made out of dependencies. That’s the software playbook: find a system made of costly, redundant objects; and rearrange it into a fast, frictionless system made of logical dependencies. The delta in performance is irresistible, and dependencies are a compelling building block: they seem like just a piece of logic, with no cost and no friction. But they absolutely have a cost: the cost is complexity, outsourced agency, and brittleness. The cost of ownership is up front and visible; the cost of access is back-dated and hidden.

Thursday, November 7th, 2019

Blot – A blogging platform with no interface

This looks like a nice way to get a blog up and running:

Blot turns a folder into a blog. Drag-and-drop files inside to publish. Images, text files, Word Documents, Markdown and more become blog posts automatically.

Tuesday, April 30th, 2019

Progressive Font Enrichment: reinventing web font performance | Responsive Web Typography

Jason describes the next big thing in web typography: streaming fonts!

…to enable the ability for only the required part of the font be downloaded on any given page, and for subsequent requests for that font to dynamically ‘patch’ the original download with additional sets of glyphs as required on successive page views—even if they occur on separate sites.

Friday, March 29th, 2019

Slashed URI

This is my kind of URL nerdery. Remy ponders all the permutations of URLs ending with slashes, ending without slashes, ending with with a file extension…

Tuesday, March 19th, 2019

Firefox Send

This’ll be handy the next time I want to send someone a file: drop it in here, and then paste the link into a DM/chat.

Friday, February 1st, 2019

Limiting JavaScript? - TimKadlec.com

Following on from that proposal for a browser feature that I linked to yesterday, Tim thinks through all the permutations and possibilities of user agents allowing users to throttle resources:

If a limit does get enforced (it’s important to remember this is still a big if right now), as long as it’s handled with care I can see it being an excellent thing for the web that prioritizes users, while still giving developers the ability to take control of the situation themselves.

Sunday, December 2nd, 2018

One Time File

Drag and drop a file up to 400MB and share the URL without a log-in (the URLs are using What Three Words).

Tuesday, November 13th, 2018

Optimise without a face

I’ve been playing around with the newly-released Squoosh, the spiritual successor to Jake’s SVGOMG. You can drag images into the browser window, and eyeball the changes that any optimisations might make.

On a project that Cassie is working on, it worked really well for optimising some JPEGs. But there were a few images that would require a bit more fine-grained control of the optimisations. Specifically, pictures with human faces in them.

I’ve written about this before. If there’s a human face in image, I open that image in a graphics editing tool like Photoshop, select everything but the face, and add a bit of blur. Because humans are hard-wired to focus on faces, we’ll notice any jaggy artifacts on a face, but we’re far less likely to notice jagginess in background imagery: walls, materials, clothing, etc.

On the face of it (hah!), a browser-based tool like Squoosh wouldn’t be able to optimise for faces, but then Cassie pointed out something really interesting…

When we were both at FFConf on Friday, there was a great talk by Eleanor Haproff on machine learning with JavaScript. It turns out there are plenty of smart toolkits out there, and one of them is facial recognition. So I wonder if it’s possible to build an in-browser tool with this workflow:

  • Drag or upload an image into the browser window,
  • A facial recognition algorithm finds any faces in the image,
  • Those portions of the image remain crisp,
  • The rest of the image gets a slight blur,
  • Download the optimised image.

Maybe the selecting/blurring part would need canvas? I don’t know.

Anyway, I thought this was a brilliant bit of synthesis from Cassie, and now I’ve got two questions:

  1. Does this exist yet? And, if not,
  2. Does anyone want to try building it?

Monday, November 12th, 2018

Squoosh

A handy in-browser image compression tool. Drag, drop, tweak, and export.

Tuesday, July 10th, 2018

When 7 KB Equals 7 MB - Cloud Four

I remember Jason telling me about this weird service worker caching behaviour a little while back. This piece is a great bit of sleuthing in tracking down the root causes of this strange issue, followed up with a sensible solution.

Sunday, June 17th, 2018

Detecting image requests in service workers

In Going Offline, I dive into the many different ways you can use a service worker to handle requests. You can filter by the URL, for example; treating requests for pages under /blog or /articles differently from other requests. Or you can filter by file type. That way, you can treat requests for, say, images very differently to requests for HTML pages.

One of the ways to check what kind of request you’re dealing with is to see what’s in the accept header. Here’s how I show the test for HTML pages:

if (request.headers.get('Accept').includes('text/html')) {
    // Handle your page requests here.
}

So, logically enough, I show the same technique for detecting image requests:

if (request.headers.get('Accept').includes('image')) {
    // Handle your image requests here.
}

That should catch any files that have image in the request’s accept header, like image/png or image/jpeg or image/svg+xml and so on.

But there’s a problem. Both Safari and Firefox now use a much broader accept header: */*

My if statement evaluates to false in those browsers. Sebastian Eberlein wrote about his workaround for this issue, which involves looking at file extensions instead:

if (request.url.match(/\.(jpe?g|png|gif|svg)$/)) {
    // Handle your image requests here.
}

So consider this post a patch for chapter five of Going Offline (page 68 specifically). Wherever you see:

if (request.headers.get('Accept').includes('image'))

Swap it out for:

if (request.url.match(/\.(jpe?g|png|gif|svg)$/))

And feel to add any other image file extensions (like webp) in there too.

Friday, February 9th, 2018

Href Tools - Free online web tools

Handy web-based tools—compress HTML, CSS, and JavaScript, and convert files from one format to another.

Tuesday, January 16th, 2018

How To Make A Drag-and-Drop File Uploader With Vanilla JavaScript — Smashing Magazine

A step-by-step guide to implementing drag’n’drop, and image previews with the Filereader API. No libraries or frameworks were harmed in the making of this article.

Monday, September 11th, 2017

No space left on device – running out of Inodes – Ivan Kuznetsov

This blog post saved my ass—the Huffduffer server was b0rked and after much Duck-Duck-Going I found the answer here.

I’m filing this away for my future self because, as per Murphy’s Law, I’m pretty sure I’ll be needing this again at some point

Thursday, January 12th, 2017

Saving you bandwidth on Google+ through machine learning

This is an interesting use of voodoo magic (or “machine learning” as we call it now) by Google to interpolate data in a small image to create a larger version. A win for performance.

Thursday, March 24th, 2016

Angola’s Wikipedia Pirates Are Exposing the Problems With Digital Colonialism | Motherboard

The street finds its own uses for colonial internet practices:

Because the data is completely free, Angolans are hiding large files in Wikipedia articles on the Portuguese Wikipedia site (Angola is a former Portuguese colony)—sometimes concealing movies in JPEG or PDF files. They’re then using a Facebook group to direct people to those files, creating a robust, completely free file sharing network.

Wednesday, April 8th, 2015

CloudConvert - convert anything to anything

Ignore the silly name: this looks a supremely useful service—convert just about any file format into just about any other file format.

Friday, January 23rd, 2015

The Emularity « ASCII by Jason Scott

Jason documents some pretty amazing levels of emulation in JavaScript:

That’s Netscape 1.0n, released in December of 1994, running inside Windows 3.11, released in August of 1993, running inside of Google Chrome 39.0.2171.99 m, released about a week ago, on a Windows 7 PC, released in 2009.

But when it comes to trying to navigate the web with that set-up, things get a bit depressing.

Tuesday, December 2nd, 2014

On File Formats, Very Briefly, by Paul Ford · The Manual

A history lesson and a love letter to the early web, taking in HTML, Photoshop, and the web standards movement.

Those were long years, the years of drop-shadows. Everything was jumping just slightly off the screen. For a stretch it seemed that drop-shadows and thin vertical columns of text would define the web. That was before we learned that the web is really a medium to display slideshows, as many slideshows as possible, with banner ads.