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Official Google Webmaster Central Blog [EN]: More options to help websites preview their content on Google Search

Google’s pissing over HTML again, but for once, it’s not by making up rel values:

A new way to help limit which part of a page is eligible to be shown as a snippet is the “data-nosnippet” HTML attribute on span, div, and section elements.

This is a direct contradiction of how data-* attributes are intended to be used:

…these attributes are intended for use by the site’s own scripts, and are not a generic extension mechanism for publicly-usable metadata.

Offline listings

This is brilliant technique by Remy!

If you’ve got a custom offline page that lists previously-visited pages (like I do on my site), you don’t have to choose between localStorage or IndexedDB—you can read the metadata straight from the HTML of the cached pages instead!

This seems forehead-smackingly obvious in hindsight. I’m totally stealing this.

PWA asset generator based on Puppeteer.

Automatically generates icons and splash screens based on Web App Manifest specs and Apple Human Interface Guidelines. Updates manifest.json and index.html files with the generated images.

A handy command line tool. Though be aware that it will generate the shit-ton of link elements for splash screens that Apple demands you provide for a multitude of different screen sizes.

Bruce Lawson’s personal site  : Structured data and Google

Bruce wonders why Google seems to prefer separate chunks of JSON-LD in web pages instead of interwoven microdata attributes:

I strongly feel that metadata that is separated from the user-visible data associated with it highly susceptible to metadata partial copy-paste necrosis. User-visible text is also developer-visible text. When devs copy/ paste that, it’s very easy to forget to copy any associated metadata that’s not interleaved, leading to errors.

Categories land in the Web App Manifest | Aaron Gustafson

Manifest files can have categories now. Time to update those JSON files.

Data on the Web Best Practices

This document provides Best Practices related to the publication and usage of data on the Web designed to help support a self-sustaining ecosystem. Data should be discoverable and understandable by humans and machines.

ManifeStation - Automagically create your Web App Manifest

If you’re going to make a manifest file for an existing site, start with this very handy tool. You give it the URL of your site and it then parses the content for existing metadata to create a best first stab at a manifest JSON file.

A Little Less Metacrap - Broken Links

Peter writes a follow-up to my post on metadata markup pointing out that Twitter will fall back to Open Graph values.

Manifest generator

A handy tool for helping you generate a JSON manifest file for your site. You’ll need one of those if you want Android devices to provide an “add to home screen” prompt.

I can tell you how I got from Deep Purple to Howling Wolf in just 25 moves. | Chloe Weil

The way that Chloe has catalogued her music over time is fascinating. It’s like the Long Now opposite of This Is My Jam.

The trouble with font classifications | Clagnut § Design thinking · Typography

Richard would like your help. Take a few minutes to run through a card-sorting exercise to help classify fonts in a more meaningful way.