Terms explained

A password checked in JavaScript is visible in the page source. The routes that actually restrict access, ranked, and how to pick one for your case.

Build a QR scanner with getUserMedia and BarcodeDetector, with a library fallback. Why the camera needs HTTPS and fails when you open the file locally.

How the dark: variant works, the difference between the media and class strategies, and why a toggle does nothing until .dark reaches the html element.

Build tabs with radio inputs, :target links or :has(). Working markup for each, what each one costs in accessibility, and how to pick between them.

The details element gives you a working accordion with no script, and the name attribute makes it exclusive. Styling, printing, and the search caveat.

A pure HTML tooltip needs one attribute. When that is not enough, a CSS-only tooltip gives you styling and keyboard support with no script at all.

A working HTML copy button, the clipboard rules that break it, the fallback for pages served over http, and how to confirm it works after sharing.

The built-in progress element, when meter is the right tag instead, and the two-div CSS bar you style freely. Plus an accessible pattern for both.

Markup for a proper HTML checklist, why ticks vanish on reload, how to keep them in local storage, and when the list has to be shared instead.

A working todo list in one HTML file: add, complete, delete and keep items after a reload. Full source, plus what to change before you share it.

Copy-paste code for a live clock, a timezone board and a countdown. No account, no third-party embed, and nothing that another service can switch off.

One file with markup, styles and script inside. What a single HTML file app can and cannot do, where it beats a project, and how to get it to people.

Twelve things plain HTML does without a framework, from native dialogs and collapsible sections to editable tables, each with the tag that does the work.

What HTML alone builds, what it needs CSS or JavaScript for, and what it genuinely cannot do. With a table of real outputs and where each one ends up.

Nine HTML projects that need no CSS at all, what each one teaches, and why a page built on browser defaults is readable rather than unfinished.

A single-file Tailwind HTML template with a header, cards, a table and dark mode. What the CDN build is good for, and what to change before it goes public.

Two ways to add Tailwind to an existing HTML file: one script tag, or a compiled stylesheet. Which to pick, what breaks, and how to handle old CSS.

A Bootstrap HTML template with a navbar, grid, cards and a table. The two tags that load it, the classes doing the work, and how to share the result.

An LMS is enrolment, tracking and records. It is not a content tool, and treating it as one is why so much course material is unreadable.

EPUB reflows to the reader's screen and font size. A PDF does not. Which one a book needs, and what it means that EPUB is HTML in a container.

Plain text with commas between values. Simple enough to have no types, which is why leading zeros vanish and dates change country.

The newer format is a zip of XML and is smaller, safer and better supported. The older one persists in organisations that never changed a template.

The older format stops at 65,536 rows and frequently truncates without saying so. That alone decides which one to use for anything with real data in it.

The phrase covers three different kinds of product. Which one somebody means changes the price a great deal.

Identity is the visual system, brand is what people think. What a small business needs to produce, and where it has to live to stay consistent.

It closes the gap between something printed and something you can change. Where that is worth doing, and where a code is decoration.

A layout file is a recipe, not a meal. It points at images and fonts stored elsewhere, which is why sending it alone never works.

Plain text with a few punctuation conventions for structure. It opens in anything, survives every format change, and converts into all of them.

A domain is a rented name pointing wherever you say. Owning it is what lets you change hosts without breaking a single link.

Free names come bundled, borrowed or from registries that reclaim them. Each is fine for something temporary and wrong for anything printed.

The page is decided before anyone visits. That single property makes it faster, cheaper, safer and harder to break than the alternative.

Static describes how the page is served, not how often it changes. The word misleads people into thinking they need something they do not.

Analytics dashboards report dozens of figures. Four of them change decisions, and a small site needs no more than those.

A camera scans a building and produces a walkable model hosted by the vendor. The capability is real and the hosting arrangement is the commitment.