The DOM module

The DOM module is there to help user create HTML files and build interfaces.

Creation and Rendering

The two functions for creating and rendering DOM elements are dom and print_dom (with alias render). The function signature of dom is dom(tag, attr, ...), where

• tag (character) is the name of a HTML tag,
• attr (a named list) is the attributes of the tag, and
• ... may include additional tags that are inserted into the current tag.

Here is an example:

#! load_library("dom")

x <- dom("div", list(innerText = "Hello World!"))

print_dom(x)

y <- dom("div", list(innerText = "Full-width color", style = "background: yellow;"))

print_dom(y)

z <- dom("div", list(),

dom("span", list(innerText = "Wrap-around color", style = "background: Gold;")))

print_dom(z)

Shorthand notation

A shorthand notation has been included in default_2_deparsers(), and it resembles the syntax used by shiny. The tag name becomes a function call; all named arguments will be passed to dom as attributes, and the unnamed ones are passed as the additional tags to be included.

#! load_library("dom")

x <- div(innerText = "Hello World")

print_dom(x)

y <- div(innerText = "Full-width color", style = "background: yellow;")

print_dom(y)

z <- div(span(innerText = "Wrap-around color", style = "background: Gold;"))

print_dom(z)

By the way, here is a reference for HTML color names.