Jens Oliver Meiert

Web Development

HTML Concepts: Constraint Validation

When a form element has attributes that define requirements for the element’s value, then these requirements—constraints—are being validated by the user agent. On the validation of constraints, validity states, and a link to CSS.

Post from July 27, 2021, filed under .

CSS: “:has()” and the Lost Paradigm

On the :has() pseudo-class and the forgotten school of ID- and class-less development.

Post from July 21, 2021, filed under .

The 3-Second Frontend Developer Test

“Do you validate?” Be a frontend developer who ships valid HTML and CSS; hire frontend developers who ship valid HTML and CSS. End the time of unconditionally accepted sloppiness in professional frontend development.

Post from July 14, 2021, filed under .

Use the “i” Element, and Use It Appropriately

“Use em instead of i” is in the Top 25 of bad advice you can get in HTML development. The two elements have different meanings, the blunt rule ignores all context, and i is a valid element with legitimate use cases.

Post from June 29, 2021, filed under .

Website Optimization Measures, Part XII

Content security policies. Promotions. Words. Tracking. Link types. Meta information. VG WORT. Social markup. Living the dream.

Post from June 21, 2021, filed under .

HTML Concepts: The “Nothing” Content Model

There’s a content model in HTML that contains—nothing. Details on what this means, and how it relates to “empty” or void elements.

Post from June 17, 2021, filed under .

Thoughts for the Aging Web Developer

There may be a time when you’ll feel “too old” for web development. When you begin to feel that, here are a few thoughts. They might not be all you need but—maybe they are of use.

Post from May 31, 2021, filed under and .

98% of the Top 100 U.S. Websites Use Invalid HTML (in 2021)

Is frontend development in the bad shape it’s said to be? Is it hyperbole when frontend developers are accused of poor quality work? When you look at the code of the most popular websites, the answer is clear.

Post from May 18, 2021, filed under .

The cover of “Upgrade Your HTML III.”

Upgrade Your HTML III

If you care about HTML as a craft, if you consider yourself an HTML minimalist, if you believe in pushing for boundaries (and sometimes overdoing it), then this is a right book (and a right book series) for you—with 10 fresh examples from the field that get inspected and improved.

Post from May 13, 2021, filed under .

Engineering Management ×12

Ideas and principles for managing engineering teams: From “competence, caring, conviction” and googliness to systems and processes to communication and delegation to team focus and health to trust and humility.

Post from May 11, 2021, filed under and .

HTML Concepts: “Body-Ok”

“body-ok” relates to link type keywords, and denotes what link elements are okay to be used in the document body.

Post from May 4, 2021, filed under .

Code in Quarantine

In the current paradigm, we often work with components and have a 1:1 relationship of HTML to CSS. This makes maintenance more predictable. However, it also pronounces the problem of rarely used code—which can be useful to put in quarantine.

Post from March 31, 2021, filed under .

33 Additional Web Development Terms You May Not Have Heard Of

As you know, Web Development has its own, special vocabulary that easily consists of several thousand terms. Do you like to try your knowledge again, on how many of the following 33 terms you know?

Post from February 12, 2021, filed under and .

HTML: The 16 Content Categories and Their Elements

HTML puts elements into content categories. This article serves as a boring, brief, but updated overview over the broad and overlapping categories of HTML, and which elements fall into them.

Post from January 20, 2021, filed under .

In Critical Defense of Frontend Development

The field of frontend development is in another crisis, largely due to an incomplete, misinterpreted definition and a bizarre mess created by “web development as a commodity” and “web development as software development.” How frontend development is more than development, and what we can (and should) do.

Post from January 12, 2021, filed under .

Ignore AMP

In 2018, my recommendation was to avoid AMP, to use AMP for the most relevant pages, or to use AMP only. In 2020 my recommendation is to ignore it, because AMP largely appears meaningless now. Upgrade Your HTML II gives an opinionated idea why.

Post from December 21, 2020, filed under .

Website Optimization Measures, Part XI

Welcome to another round-up of possible website improvements, this time going from several types of link updates to table of contents CSS upgrades to CDN integration and privacy policy checks.

Post from December 14, 2020, filed under and .

Notes on HTML 3.2

Would it still be useful to read the HTML 3.2 specification—from 1997? A few observations.

Post from December 6, 2020, filed under .

The cover of “Upgrade Your HTML II.”

Upgrade Your HTML II

If you care about HTML as a craft, if you consider yourself an HTML minimalist, if you believe in pushing for boundaries (and sometimes overdoing it), then this is a right book (and a right book series) for you—with 10 new examples from the field that get inspected and improved.

Post from November 17, 2020, filed under .

On HTML (and HTML in 2020)

What seems noteworthy about HTML, and how we’re doing on that in the year 2020.

Post from November 10, 2020, filed under .

Custom Properties: Questioning :root

For custom properties (aka CSS variables) we got into the habit of declaring variables in a rule with a :root selector. Yet unless you’re working in an environment in which style sheets serve several document types (and roots), question this use of :root.

Post from September 21, 2020, filed under .

Website Optimization Measures, Part X

9 TILs that I applied to my personal projects.

Post from August 30, 2020, filed under .

The Anti-Reset

I advise against resets. You don’t need them. (We don’t need them.) Yet what’s the opposite of a reset? Of all resets? The anti-reset. It looks something like this—

Post from August 17, 2020, filed under .

33 Web Development Terms You May Not Have Heard Of

Web Development has its own, special vocabulary that easily consists of several thousand terms. Even if you’re an experienced developer you’re unlikely to know all of them. Still, do you like to try your knowledge? How many of the following terms do you know?

Post from June 30, 2020, filed under and .

The 25 Boolean Attributes of HTML

What is a Boolean, what is a Boolean attribute, how does a Boolean attribute work, and what Boolean attributes are there? Meet the Boolean attributes, from allowfullscreen to truespeed.

Post from May 19, 2020, filed under .

If you like what you see here, consider the ebook version of all of my 2005–2015 posts on web design and development: On Web Development.

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Cover: The Web Development Glossary.

Perhaps my most comprehensive book: The Web Development Glossary (2020). With explanations and definitions for literally thousands of terms from Web Development and related fields, building on Wikipedia as well as the MDN Web Docs. Available at Apple Books, Google Play Books, and Leanpub.

Cover: Upgrade Your HTML III.

My book series: Upgrade Your HTML (2019–2021). Good HTML isn’t easy. Minimal HTML is underrated. Production HTML can often be improved. This series does so. Available at Amazon, Apple Books, Google Play Books, and Leanpub.

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Last update: July 27, 2021

Professional frontend developers produce valid HTML and CSS.