Repository Mirror for your Cloud Server and Webhosting

Title:

'HTML' Element Construction

Version:

1.0.0

Description:

Provides a deterministic, framework-agnostic Domain-Specific Language for building 'HTML' nodes and rendering them to a string.

License:

MIT + file LICENSE

URL:

https://github.com/sigflux/hypertext

BugReports:

https://github.com/sigflux/hypertext/issues

Encoding:

UTF-8

RoxygenNote:

7.3.3

Suggests:

testthat (≥ 3.0.0)

Config/testthat/edition:

NeedsCompilation:

Packaged:

2026-02-23 02:52:02 UTC; mwavu

Author:

Kennedy Mwavu

[aut, cre], Sigflux [cph, fnd]

Maintainer:

Kennedy Mwavu <mwavukennedy@gmail.com>

Repository:

CRAN

Date/Publication:

2026-02-27 20:00:02 UTC

Escape special HTML characters

Description

Replaces &, <, >, ⁠"⁠, and ⁠'⁠ with their HTML entity equivalents.

Usage

.escape_html(x)

Arguments

x

A character string.

Value

A character string with HTML special characters escaped.

Flatten children

Description

Recursively unpack plain lists (but not hypertext.tag nodes) so users can pass list(tags$li("a"), tags$li("b")) as a single child argument.

Usage

.flatten_children(x)

Arguments

x

A list of children.

Value

A flat list of children.

Create a tag function for a normal (non-void) element

Description

Create a tag function for a normal (non-void) element

Usage

.make_tag(tag_name)

Create a tag function for a void (self-closing) element

Description

Create a tag function for a void (self-closing) element

Usage

.make_void_tag(tag_name)

Render a named list of attributes to a single HTML attribute string

Description

NA values produce boolean / valueless attributes (e.g. disabled).
NULL values are silently dropped.
TRUE produces a boolean attribute; FALSE drops it.
Character vectors of length > 1 are collapsed with a space (handy for class = c("a", "b")).

Usage

.render_attrs(attrs)

Arguments

attrs

A named list of attribute values.

Value

A single character string (leading space included when non-empty).

Create an HTML element node

Description

Low-level constructor. Named arguments become attributes; unnamed arguments become children (text or nested nodes). This function is used internally by every entry in the tags list.

Usage

.tag(tag_name, ..., .void = FALSE)

Arguments

tag_name

Character scalar – the HTML element name.

...

Attributes (named) and children (unnamed).

.void

Logical; if TRUE the element is self-closing and children are ignored.

Value

A list of class "hypertext.tag" with components tag, attrs, and children.

Render an HTML node tree to a character string

Description

Converts an hypertext.tag object (and all its descendants) into an HTML string. Text children are escaped; nested hypertext.tag children are rendered recursively.

Usage

render(x)

## S3 method for class 'hypertext.tag'
render(x)

## Default S3 method:
render(x)

## S3 method for class 'list'
render(x)

Arguments

x

An hypertext.tag object, a character string, or a list of these.

Value

A single character string of HTML.

HTML tag functions

Description

A named list of functions, one per HTML5 element. Access individual tags with tags$div(...), tags$p(...), etc.

Usage

tags

Format

An object of class list of length 115.

Details

Named arguments become HTML attributes; unnamed arguments become child nodes or text content.

Boolean / valueless attributes

Pass NA or TRUE as the attribute value to produce a valueless attribute (e.g. disabled). FALSE or NULL suppresses the attribute entirely.

Multi-value attributes

Character vectors of length > 1 are collapsed with a space, so class = c("a", "b") renders as class="a b".

Examples

tags$p(class = "lead", "Hello, world!")
render(tags$div(id = "app", tags$h1("Title")))