But more so, external style cannot be applied to a subsection of a web page unless they force it into an iframe, which has all sorts of issues of it's own which is why external CSS is usually ignored. Inline CSS is often stripped by the tag strippers who don't want you turning things on or off... and media queries shouldn't even play into it since the layout should be controlled by the page it's being shown inside (for webmail) or the client itself, NOT your mail.

Whilst I realize the artsy fartsy types get a raging chodo over their goofy PSD based layout asshattery

That's what's supported, and is all that is EVER likely to be supported... and even then be DAMNED sure you send multipart with a plaintext copy or a great many mail servers will flat out reject it on the assumption that no legitimate e-mail has any damned business even having HTML in it in the first place!

that garbage has ZERO damned business in an e-mail which is why a great many places use HTML only e-mail as a trigger for spam detection! (if you send multipart as both text/html and text/plain, you're fine)

That's something that has been bugging me too. I mean, it's fine if not everything is supported, but if everyone could agree on what is or should be supported then that would make a huge difference. But until then, it's going to be a struggle.

I've worked with people at companies where this was their only responsibility. Setting up emails for clients, making sure they pass a battery of tests and look great in all browsers and clients. It's an incredible PITA and it's not a set it and forget it thing. Clients can change month to month; spam filters change, etc...

There is a lot of variation in styling support among different mail clients

For now though, you're stuck with <table> and CSS2 support for your layouts.

Honestly, even without flexbox support, most of the layout problems would be solved with simple-basic CSS3 support that is standard in all clients.

Email is Hard: learn how MJML will help you.

I hate to be the guy who will destroy your day but... Tables. You need to work with nested tables/cells. If you think Gmail is annoying you will cry in agony if you also need Outlook support.Work with the good old HTML from the early 2000's. That's the only way to be sure everything will work as intended.Anything else will mostly result in a horrible mess, broken design and incompatible layouts.

As a conclusion, I’d say that Flexbox in an email unfortunately causes more troubles than it helps solving.

This approach also splits email development for modern email clients and older clients in two. You can use Safari/Chrome to test and develop modern techniques for WebKit-supported clients while using Firefox for your baseline experience for older clients like Outlook.

Remember, even the email clients with better HTML and CSS support have their own individual quirks and still require testing to see what’s possible.

More importantly, using a plain email would save lots of time and effort. As a goal-driven-lazy person, that’s a good enough reason to start experimenting.

They don't look like advertisements. The second the recipient interprets your email as an ad, promotion, or sales pitch—and it does take just a second—its chances of being read or acted upon plummet towards zero. A plain email leads people to start reading it before jumping to conclusions.

They feel more personal. It's no handwritten note, but it's much more personal than an over-designed email with the recipient's first name crammed somewhere inside.

The plain, unstyled emails resulted in more opens, clicks, replies, and conversions, every time.

They're less likely to go into the "Promotions" tab in Gmail (used by ~16% of all email users), for the same reasons above. From my testing, the plain emails typically end up in the Updates tab and some times even in the primary tab. Of course, the text in the email also affects this.

The plain email—which took no time to design or code—was opened by more recipients and had 3.3x more clicks than the designed email.

If you ever had to go through the hair-pulling process of designing emails, then you understand. If you haven’t, here’s why it’s such pain:

Email tools/clients are inconsistent in how they render HTML and CSS. A designed email might look great in Gmail, broken in Outlook, and unreadable in Apple Mail. Half of all emails are opened on mobile devices (according to one study). Email looks good in different clients? Great, now make it work on a 4" screen just as well as on a desktop.

Email require their own flavor of HTML and CSS. Want to have rows or columns in your layout? You'll have to use <table> tags—a method long buried by web developers. There's also no support for external stylesheets, element position styling, and so on...

You'll have to use <table> tags—a method long buried by web developers

Embedded CSS: This style is becoming more popular with the rise of mobile and responsive emails. Embedded CSS codes are determined in one place of an email, generally in the <head> section as a <style>. Some email servers still strip the information out of this section, which can cause display problems.

I would try designing your mail-template as "normal" as possible. Tables help a lot for example (yuck).

Although a lot of email development is stuck in the past, that doesn’t mean we can’t modernize our campaigns right along with our websites. Many of these tips can be baked right into your email boilerplate or code snippets, allowing you to create more accessible HTML emails without too much thought.

I hate making newsletters, but absolutely love reading them.

I hate making newsletters, but absolutely love reading them. Because of this, and on a semi-related note (apologies if this is off-topic/not allowed), I am in the process of creating a newsletter directory, allowing users to browse and find newsletters to sign up for.

While it’s not quite completely table-free, I’ve managed to get The Intermittent Newsletter down to a single table—one that’s not even visible to non-Microsoft email clients. Along the way, I made an effort to make The Intermittent Newsletter accessible to more readers.

The command nix-shell will build the dependencies of the specified derivation, but not the derivation itself. It will then start an interactive shell in which all environment variables defined by the derivation path have been set to their corresponding values, and the script $stdenv/setup has been sourced. This is useful for reproducing the environment of a derivation for development.

source $stdenv/setup
genericBuild

The best tool is no tool, the best build step is no build step, the best update is no update. HTML gives us all that, and more.

It should be defined inline. If you are using the img tag, that image should have semantic value to the content, which is why the alt attribute is required for validation. If the image is to be part of the layout or template, you should use a tag other than the img tag and assign the image as a CSS background to the element. In this case, the image has no semantic meaning and therefore doesn't require the alt attribute. I'm fairly certain that most screen readers would not even know that a CSS image exists.

Ah yes, excactly the right answer. Img tags are for information, css backgrounds are for layout.

What's the "correct" semantic way to specify image height and width? In CSS... width:15px; or inline... <img width="15" ?

You should always specify the height and the width of an image if only to help the browser lay the page out even before the image has been downloaded.

use the width (and the height) attribute....to identify the intrinsic height of the image file, not to specify the desired layout size

<aside> is appropriate if the side note "could be considered separate from the content"

<aside> is not appropriate if the side note is "a parenthetical". The W3C gives no examples of what it means.

knit: (function(inputFile, encoding) { rmarkdown::render(inputFile, encoding = encoding, output_dir = "pdf") })

My preference here is biased by the fact that I spend everyday at work building web components, so Svelte's approach feels very familiar to slots in web components.

<template> and <slot>

This element and its contents are not rendered in the DOM, but it can still be referenced using JavaScript.

Using these attributes will show validation errors, or limit what the user can enter into an <input>.

Last week, I shared how to check if an input is empty with CSS. Today, let’s talk about the same thing, but with JavaScript.

The :empty selector refers only to child nodes, not input values. [value=""] does work; but only for the initial state. This is because a node's value attribute (that CSS sees), is not the same as the node's value property (Changed by the user or DOM javascript, and submitted as form data).

If you would like to make “empty” include values that consist of spaces only, you can add the attribute pattern=.*\S.*.

Generally, CSS selectors refer to markup or, in some cases, to element properties as set with scripting (client-side JavaScript), rather than user actions. For example, :empty matches element with empty content in markup; all input elements are unavoidably empty in this sense. The selector [value=""] tests whether the element has the value attribute in markup and has the empty string as its value. And :checked and :indeterminate are similar things. They are not affected by actual user input.

You don’t need to do any tricky cursor stuff, because it’s all semantically wired up already.

You can do and impressive amount of form validation with just HTML attributes. You can make the user experience pretty clean and clear with CSS selectors.

Currently, there is no way to style those little validation tooltips.

the client form validation is the one I like a lot, because, for example, by adding required attribute to an input, I don’t need to write any additional JavaScript to warn a user, when the user submits a form without filling out the required fields

Website: <input type="url" name="website" required pattern="https?://.+"> Now our input box will only accept text starting with http:// or https:// and at least one additional character

var applicationForm = document.getElementById("applicationForm"); if (applicationForm.checkValidity()) { applicationForm.submit(); } else { applicationForm.reportValidity(); }

A Nix expression describes everything that goes into a package build action (a “derivation”)

For each output declared in outputs, the corresponding environment variable is set to point to the intended path in the Nix store for that output. Each output path is a concatenation of the cryptographic hash of all build inputs, the name attribute and the output name. (The output name is omitted if it’s out.)

A derivation causes that derivation to be built prior to the present derivation; its default output path is put in the environment variable.

derivationA description of a build action. The result of a derivation is a store object. Derivations are typically specified in Nix expressions using the derivation primitive. These are translated into low-level store derivations (implicitly by nix-env and nix-build, or explicitly by nix-instantiate).

$stdenv/setup

The function mkDerivation in the Nixpkgs standard environment is a wrapper around derivation that adds a default value for system and always uses Bash as the builder, to which the supplied builder is passed as a command-line argument. See the Nixpkgs manual for details.

C.12. Release 1.6 (2013-09-10)In addition to the usual bug fixes, this release has several new features:The command nix-build --run-env has been renamed to nix-shell.

Chapter 14. A Simple Nix Expression

Add the package to the file pkgs/top-level/all-packages.nix. The Nix expression written in the first step is a function; it requires other packages in order to build it. In this step you put it all together, i.e., you call the function with the right arguments to build the actual package.

$ nix-env -i firefox --substituters ssh://alice@avalon This works similar to the binary cache substituter that Nix usually uses, only using SSH instead of HTTP

substitute

When you ask Nix to install a package, it will first try to get it in pre-compiled form from a binary cache. By default, Nix will use the binary cache https://cache.nixos.org; it contains binaries for most packages in Nixpkgs. Only if no binary is available in the binary cache, Nix will build the package from source. So if nix-env -i subversion results in Nix building stuff from source, then either the package is not built for your platform by the Nixpkgs build servers, or your version of Nixpkgs is too old or too new.

closure

the closure of a store path (that is, the path and all its dependencies)

The command nix-copy-closure copies a Nix store path along with all its dependencies to or from another machine via the SSH protocol. It doesn’t copy store paths that are already present on the target machine. For example, the following command copies Firefox with all its dependencies:

subscribes you to a channel that always contains that latest version of the Nix Packages collection.

A Nix channel is just a URL that points to a place that contains a set of Nix expressions and a manifest.

garbage collector roots

$ nix-env --switch-profile /nix/var/nix/profiles/my-profile $ nix-env --switch-profile /nix/var/nix/profiles/default These commands switch to the my-profile and default profile, respectively. If the profile doesn’t exist, it will be created automatically.

Chapter 10. ProfilesProfiles and user environments are Nix’s mechanism for implementing the ability to allow different users to have different configurations, and to do atomic upgrades and rollbacks.

user environment

In Nix, different users can have different “views” on the set of installed applications. That is, there might be lots of applications present on the system (possibly in many different versions), but users can have a specific selection of those active — where “active” just means that it appears in a directory in the user’s PATH. Such a view on the set of installed applications is called a user environment, which is just a directory tree consisting of symlinks to the files of the active applications.

nix-env -qas

4.3.1. Change the Nix store path prefix

At the same time, it is not possible for one user to inject a Trojan horse into a package that might be used by another user.

Chapter 6. SecurityNix has two basic security models. First, it can be used in “single-user mode”, which is similar to what most other package management tools do: there is a single user (typically root) who performs all package management operations. All other users can then use the installed packages, but they cannot perform package management operations themselves.Alternatively, you can configure Nix in “multi-user mode”. In this model, all users can perform package management operations — for instance, every user can install software without requiring root privileges. Nix ensures that this is secure. For instance, it’s not possible for one user to overwrite a package used by another user with a Trojan horse.

reentrancy

You can uninstall Nix simply by running: $ rm -rf /nix

$ mkdir /nix $ chown alice /nix

To explicitly select a single-user installation on your system:

nix-shell '<nixpkgs>' -A pan

SYNOPSIS
nix-shell [--arg name value] [--argstr name value] [{--attr | -A} attrPath] [--command cmd] [--run cmd] [--exclude regexp] [--pure] [--keep name] {{--packages | -p} packages...  | [path]}

since packages aren’t overwritten, the old versions are still there after an upgrade. This means that you can roll back to the old version:

Specifying a name and a src is the absolute minimum Nix requires.

For convenience, you can also use pname and version attributes and mkDerivation will automatically set name to "${pname}-${version}" by default.

6.1. Using stdenv

fetchpatch works very similarly to fetchurl with the same arguments expected. It expects patch files as a source and and performs normalization on them before computing the checksum. For example it will remove comments or other unstable parts that are sometimes added by version control systems and can change over time.

19.3. Submitting security fixes Security fixes are submitted in the same way as other changes and thus the same guidelines apply. If the security fix comes in the form of a patch and a CVE is available, then the name of the patch should be the CVE identifier, so e.g. CVE-2019-13636.patch in the case of a patch that is included in the Nixpkgs tree. If a patch is fetched the name needs to be set as well, e.g.: (fetchpatch { name = "CVE-2019-11068.patch"; url = "https://gitlab.gnome.org/GNOME/libxslt/commit/e03553605b45c88f0b4b2980adfbbb8f6fca2fd6.patch"; sha256 = "0pkpb4837km15zgg6h57bncp66d5lwrlvkr73h0lanywq7zrwhj8"; }) If a security fix applies to both master and a stable release then, similar to regular changes, they are preferably delivered via master first and cherry-picked to the release branch. Critical security fixes may by-pass the staging branches and be delivered directly to release branches such as master and release-*.

18.6. Patches Patches available online should be retrieved using fetchpatch. patches = [ (fetchpatch { name = "fix-check-for-using-shared-freetype-lib.patch"; url = "http://git.ghostscript.com/?p=ghostpdl.git;a=patch;h=8f5d285"; sha256 = "1f0k043rng7f0rfl9hhb89qzvvksqmkrikmm38p61yfx51l325xr"; }) ];

stdenv.mkDerivation rec {
  pname = "freeswitch";
  version = "1.10.5";
  src = fetchFromGitHub {
    owner = "signalwire";
    repo = pname;
    rev = "v${version}";
    sha256 = "18dhyb19k28dcm1i8mhqvvgm2phsrmrwyjmfn79glk8pdlalvcha";
  };

  patches = [
    # https://github.com/signalwire/freeswitch/pull/812 fix mod_spandsp, mod_gsmopen build, drop when updating from 1.10.5
    (fetchpatch {
      url = "https://github.com/signalwire/freeswitch/commit/51fba83ed3ed2d9753d8e6b13e13001aca50b493.patch";
      sha256 = "0h2bmifsyyasxjka3pczbmqym1chvz91fmb589njrdbwpkjyvqh3";
    })
  ];
  postPatch = ''
    patchShebangs     libs/libvpx/build/make/rtcd.pl
    substituteInPlace libs/libvpx/build/make/configure.sh \
      --replace AS=\''${AS} AS=yasm

    # Disable advertisement banners
    for f in src/include/cc.h libs/esl/src/include/cc.h; do
      {
        echo 'const char *cc = "";'
        echo 'const char *cc_s = "";'
      } > $f
    done
  '';

6.5. Phases

in this post, we’ll look at how to use this as the basis for an accessible dropdown navigation element that can be opened equally well by keyboard users tabbing through the page, and mouse users hovering on the nav item

The HTML details element comes with a surprise – in most browsers it has the ability to hide and show content with no additional JavaScript or CSS whatsoever. Here’s a little bit about how it works. details has with a child called summary, and when a page first loads, the summary is the only part of the element that’s visible, along with a triangle that browsers display by default, to suggest the expandable nature of the content. Interacting with the summary element, by clicking or using the keyboard, will make the rest of the details element visible and add an open attribute to the details element itself.

<pre>  My Bonnie lies over the ocean.   My Bonnie lies over the sea.  My Bonnie lies over the ocean.  Oh, bring back my Bonnie to me.</pre>

Use inline styles for everything.

See screenshots of your emails across 90+ apps

The Gmail Android app that comes pre-installed with most new Android phones contains a feature to access non-Google accounts using POP and IMAP. Unfortunately, emails accessed through this setup lack the embedded style (<style>) support as well as the support for background images.

How to wrap long word (text without spaces) in html table’s cell? This is very, very easy! We must add only a CSS proprty to table cell “td” tag – “word-break: break-all;” then all column’s widths become as intended. 

It is also very likely that the contents of the table might change the structure or dimensions of the table. For example, long words residing in the table cells can cause the cell width to increases. If you fix that problem, it might happen that the long words cross the cell boundaries.

<svelte-virtual-list-row>

<q>Dies ist ein deutsches Zitat</q>

for authoring accessible pages on the web ranging from static documents to dynamic applications.

SVG has the advantage that integrates very well with Svelte, since it’s an XML and the nodes can be managed as if they were HTML. On the other hand, Canvas is more efficient, but it has to be generated entirely with JavaScript.

If you set the width to a fixed number of pixels, then rotating portrait to landscape just changes the scale, because the number of virtual pixels remains constant.

HTML contient un nombre arrêté d’éléments définis dans un standard, sans customisation possible

It won't work in all use cases, but it's better than the div soup.

I run into this on almost every project and end up doing this as a workaround: :global([slot="content"]) This allows me to style that extra div in the component that contains the slots but it would be super nice to have <MyComponent slot="content"/> and eliminate that extra div

If this is getting implemented, I think I'll love to see both implemented. I can see a lot of use cases where I would like to encapsulate the component with additional wrappers and in another scenarios I would like to just use the component. Now i work around this using empty div but then at times it breaks the structure because of the div element and I'll have to add more class utilities to make it work. This will be a great addition for Svelte.

I don't like adding unnecessary divs.

I'm looking at https://html.spec.whatwg.org/#attributes-3 right now, and it seems that there are a few others that ought to be boolean but are not currently in this list: allowpaymentrequest, formnovalidate, hidden (is on the original list in the master branch), itemscope, nomodule, and playsinline.

hyperscript is more concise because it's just a function call and doesn't require a closing tag. Using it will greatly simplify your tooling chain.

Create HyperText with JavaScript

HTML template strings for the Browser with support for Server Side Rendering in Node.

By using HTML as the uniform interface, we can separate the interface from the engine.

If a part of the content deserves its own heading, and that heading would be listed in a theoretical or actual table of contents, it should be placed in a <section>. The key exception is where the content may be syndicated; in this case, use <article> element instead.

These all come from the HTML Standard.

Encoded multiple times using the HTML Entity Encoding

This Boolean attribute is set to indicate to a browser that the script is meant to be executed after the document has been parsed, but before firing DOMContentLoaded.

The defer attribute has no effect on module scripts — they defer by default.

This is a boolean attribute: the presence of a boolean attribute on an element represents the true value, and the absence of the attribute represents the false value.

setClient in _layout.svelte

The <output> tag represents the result of a calculation. Typically this element defines a region that will be used to display text output from some calculation.

setCustomValidity

Note that we added HTML validation with specifying the types of the field (email and password). This allows the browser to validate the input.

El matrimonio igualitario Argentina, Uruguay, México, Brasil y Colombia son los únicos países de América Latina que han legalizado el matrimonio de parejas homosexuales, con todas las condiciones legales que tienen los matrimonios convencionales. De igual manera, Holanda, Bélgica, Suecia, Alemania, Sudáfrica, España, Inglaterra, Portugal y otras 12 naciones más han hecho lo propio.   Entretanto, sólo 11 países permiten la unión civil entre parejas del mismo sexo (no incluye todos los derechos legítimos maritales) entre estos Ecuador, Chile, Austria, Italia y Grecia. Cambio de identidad El proceso de cambio de género o sexo es un proceso quirúrgico y psicológico que contempla el cambio físico. En la actualidad, naciones como Venezuela, Colombia, Uruguay, Bolivia y Perú permiten que la transformación también sea legal, con el cambio del nombre y género en los documentos de identidad de las personas LGBTI. Sin embargo, en Brasil y Argentina, este tipo de decretos han sido desaprobados o son procesos difíciles por lo riguroso de los exámenes y requisitos que truncan el derecho al trámite. Igualdad en derechos patrimoniales Las garantías, protecciones legales en los matrimonios tras el fallecimiento y divorcio también son logros alcanzados en menos de 20 años por la comunidad LGBTI. Pero estos aún están condicionados dependiendo del país, por la diferencia entre permitir la unión civil (algunos derechos de cónyuges) o el matrimonio igualitario (derechos legítimos).   Adopción homoparental Uruguay, México, Canadá (el primer país en permitirlo en 1999) y algunos estados de EE.UU. han legalizado la adopción para personas unidas del mismo sexo. Asimismo, España, Holanda, Francia y otros permiten que las parejas no heterosexuales puedan tener hijos por medio de la adopción legal. Protección a víctimas de discriminación Hasta 1948 la homosexualidad era considerada una enfermedad mental, pero esto cambió lo que permitió la apertura de sistemas de protección a víctimas de discriminación y agresión. En la actualidad, existen programas de atención social y judicial para el seguimiento de los casos de hostigamiento y asesinatos contra los homosexuales. Además hay coberturas de salud gratuitas para tratar enfermedades como el sida y la programas de integración laboral en distintas áreas. Tags Día contra la Homofobia LGBTI Derechos Discriminación BBC - La Vanguardia - El Excelsior - La Semana Por: teleSUR- db - SB - JCM Noticias Relacionadas OLP exhorta a Oriente Medio a tomar medidas contra Guatemala Bolivia afirma que Venezuela frena dominación de EE.UU. 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The only difference is that they’re named with camelCase like onClick, onFocus, onDragEnter instead of the all-lowercase names from HTML (onclick, onfocus, ondragenter).

Constraints

The bindings are two-way because any HTML5 contraint validation errors will be added to the Final Form state, and any field-level validation errors from Final Form will be set into the HTML5 validity.customError state.

Datos abiertos enlazados y libros abiertos: impacto en las bibliotecas y en el desarrollo de la sociedad de la información

Content that is self-contained in that it makes sense on its own when taken out of context. That could mean a widget, a blog post or even a comment within a blog post.

One of the most important concepts in AMP’s design is its focus on reducing the amount of DOM reflow required to render its web pages. To reduce DOM reflow, AMP includes a layout system to ensure the layout of the page is known as early as possible in the lifecycle of downloading and rendering the page.

Why was the container type inferred? Because we did not specify a height attribute for the amp-img tag. In HTML, reflow can be reduced by always specifying a fixed width and height for elements on a page. In AMP, you need to define the width and height for amp-img elements so that AMP can pre-determine the aspect ratio of the element.