`Card`¶

Group a titled piece of related content in a styled surface.


Import	`from hedron import Card`
Distribution	`hedron`
Backend activity	No
Normal render mode	`RenderMode.FRAGMENT`

Live demo¶

Latest deploymentReady

api-production
Build completed in 42 seconds.

The preview is a local docs simulation (not a running Hedron server). Interactive demos show a “Simulated HTMX” trace when applicable.

Basic use¶

from hedron import Card, Link, Text
component = Card(Text('Build completed in 42 seconds.'), title='Latest deployment', footer=Link('View logs', '/logs'))

Compose under Page for full documents, or return from a fragment route for HTMX swaps.

How it works¶

Card emits an addressable article with distinct header, body, and optional footer wrappers. The convenience title becomes an h3; use the header slot when the surrounding document requires another heading level or richer content. Its body accepts ordinary nested components, including layouts and forms, through the same renderer pipeline.

This component's core behavior is server-rendered HTML and does not require a browser runtime. The preview is ordinary semantic HTML, so keyboard, form, link, and disclosure behavior comes from the platform.

Constructor and parameters¶

Card(*nodes, children=None, title=None, header=None, footer=None, id=None, class_=None)

Parameter	Type	Meaning
`nodes`	`NodeLike`	Positional card body content.
`children`	`NodeLike \| sequence \| None`	Keyword body content; combines with positional nodes.
`title`	`str \| None`	Convenience title rendered as an `h3` when no header slot is supplied.
`header`	`NodeLike \| None`	Custom header slot; takes precedence over title.
`footer`	`NodeLike \| None`	Actions or supporting content.
`id`	`str \| None`	Stable ID when the complete card is a swap target.
`class_`	`str \| None`	Application class appended to `hedron-card`.

Composition and backend behavior¶

Keep Card at the smallest semantic boundary. Fragment routes should return only the replaced region and preserve stable target IDs across success, validation, empty, loading, and error responses.

Card is primarily presentational; keep any mutation on an explicit action or component route.

Accessibility¶

Choose a custom Heading in header when an automatic h3 would skip or repeat levels.

Security¶

Escaping and SafeUrl / TrustedHtml are framework concerns; authorization and data exposure remain application code. Redact secrets before rendering.

Common mistakes¶

Do not make an entire complex card clickable when it contains other interactive controls.
Do not copy docs-preview JavaScript into an application server.

Testing¶

from hedron import RenderMode, render

result = render(component, mode=RenderMode.FRAGMENT)
assert result.html
assert not result.diagnostics

All component demos · Built-in API · Testing

Card¶