# Web Development glossary: Journeyman level

32 Web Development terms at the Journeyman level, each with a short definition and a link to its full page.

Updated: September 27, 2026

[Study these as flash cards](https://www.ask-codey.com/decks/web-development/journeyman)

- [409 Conflict](https://www.ask-codey.com/glossary/409-conflict): The request clashes with the current state, like a duplicate.
- [422 Unprocessable Content](https://www.ask-codey.com/glossary/422-unprocessable-content): Well-formed data whose values break the rules.
- [429 Too Many Requests](https://www.ask-codey.com/glossary/429-too-many-requests): You sent too many requests; wait and try again.
- [aria-hidden](https://www.ask-codey.com/glossary/aria-hidden): An ARIA attribute that removes an element and its descendants from the accessibility tree when true.
- [aria-label](https://www.ask-codey.com/glossary/aria-label): An ARIA attribute that supplies an accessible name as a text value.
- [aria-labelledby](https://www.ask-codey.com/glossary/aria-labelledby): An ARIA attribute that uses other elements' text to form an accessible name.
- [Art direction](https://www.ask-codey.com/glossary/art-direction): Providing differently composed or cropped images for different presentation conditions.
- [Authentication](https://www.ask-codey.com/glossary/authentication): Proving who you are.
- [Authorization](https://www.ask-codey.com/glossary/authorization): Deciding what an identified user is allowed to do.
- [Breakpoint](https://www.ask-codey.com/glossary/breakpoint): A screen width where the layout changes.
- [Canonical link](https://www.ask-codey.com/glossary/canonical-link): A link identifying the preferred URL for content available through multiple URLs.
- [Character encoding declaration](https://www.ask-codey.com/glossary/character-encoding-declaration): Markup near the start of a document that declares its text encoding as UTF-8.
- [Cookie](https://www.ask-codey.com/glossary/cookie): Small data the browser stores and sends back to the same site on every request.
- [CORS](https://www.ask-codey.com/glossary/cors): Server rules that tell browsers which other sites may call it.
- [Document language](https://www.ask-codey.com/glossary/document-language): The primary human language of a document or element's text.
- [Favicon](https://www.ask-codey.com/glossary/favicon): An icon associated with a website or page for browser tabs, bookmarks, and similar interfaces.
- [JWT](https://www.ask-codey.com/glossary/jwt): A signed token carrying who the user is and when it expires.
- [Lazy loading](https://www.ask-codey.com/glossary/lazy-loading): Delaying an off-screen resource until it is likely to be needed.
- [Location Header](https://www.ask-codey.com/glossary/location-header): A header pointing to a new resource or a redirect target.
- [Media query](https://www.ask-codey.com/glossary/media-query): Applies CSS only when a condition is true, like a minimum screen width.
- [Meta description](https://www.ask-codey.com/glossary/meta-description): A short document summary supplied as metadata, often used by search and sharing tools.
- [Mobile-first design](https://www.ask-codey.com/glossary/mobile-first-design): Phone layout first, then media queries for bigger screens.
- [noopener](https://www.ask-codey.com/glossary/noopener): A link relationship that prevents a newly opened page from receiving an opener reference.
- [noreferrer](https://www.ask-codey.com/glossary/noreferrer): A link relationship that omits referrer information and also prevents an opener relationship.
- [prefers-color-scheme](https://www.ask-codey.com/glossary/prefers-color-scheme): Checks whether the user prefers a light or dark theme.
- [prefers-reduced-motion](https://www.ask-codey.com/glossary/prefers-reduced-motion): Checks whether the user asked for less animation.
- [Responsive design](https://www.ask-codey.com/glossary/responsive-design): One page that adapts its layout to any screen size.
- [Responsive image](https://www.ask-codey.com/glossary/responsive-image): An image setup that lets the browser select a suitable resource for the display and layout.
- [Safe Method](https://www.ask-codey.com/glossary/safe-method): A method that only reads and never changes data, like GET.
- [tabindex](https://www.ask-codey.com/glossary/tabindex): A global attribute that controls whether and where an element participates in sequential focus navigation.
- [Text direction](https://www.ask-codey.com/glossary/text-direction): The direction in which text and inline content progress.
- [Viewport metadata](https://www.ask-codey.com/glossary/viewport-metadata): Metadata that guides how a page's viewport is sized and scaled on mobile devices.

- Previous level: [Apprentice](https://www.ask-codey.com/glossary/subjects/web-development/apprentice)
- Next level: [Freelancer](https://www.ask-codey.com/glossary/subjects/web-development/freelancer)

[Every Web Development term, by level](https://www.ask-codey.com/glossary/subjects/web-development)

Source: https://www.ask-codey.com/glossary/subjects/web-development/journeyman