Define an HTML dependency (i.e. CSS and/or JavaScript bundled in a directory). HTML dependencies make it possible to use libraries like jQuery, Bootstrap, and d3 in a more composable and portable way than simply using script, link, and style tags.
htmlDependency(
name,
version,
src,
meta = NULL,
script = NULL,
stylesheet = NULL,
head = NULL,
attachment = NULL,
package = NULL,
all_files = TRUE
)An object that can be included in a list of dependencies passed to
attachDependencies().
Library name
Library version
Unnamed single-element character vector indicating the full path of the library directory. Alternatively, a named character string with one or more elements, indicating different places to find the library; see Details.
Named list of meta tags to insert into document head
Script(s) to include within the document head (should be
specified relative to the src parameter).
Stylesheet(s) to include within the document (should be
specified relative to the src parameter).
Arbitrary lines of HTML to insert into the document head
Attachment(s) to include within the document head. See Details.
An R package name to indicate where to find the src
directory when src is a relative path (see
resolveDependencies()).
Whether all files under the src directory are
dependency files. If FALSE, only the files specified in
script, stylesheet, and attachment are treated as
dependency files.
Each dependency can be located on the filesystem, at a relative or
absolute URL, or both. The location types are indicated using the names of
the src character vector: file for filesystem directory,
href for URL. For example, a dependency that was both on disk and at
a URL might use src = c(file=filepath, href=url).
script can be given as one of the following:
a character vector specifying various scripts to include relative to the
value of src.
Each is expanded into its own <script> tag
A named list with any of the following fields:
src,
integrity, &
crossorigin,
any other valid <script> attributes.
allowing the use of SRI to ensure the integrity of packages downloaded from
remote servers.
Eg: script = list(src = "min.js", integrity = "hash")
An unamed list, containing a combination of named list with the fields mentioned previously, and strings. Eg:
script = list(list(src = "min.js"), "util.js", list(src = "log.js"))
script = "pkg.js" is equivalent to
script = list(src = "pkg.js").
attachment can be used to make the indicated files available to the
JavaScript on the page via URL. For each element of attachment, an
element <link id="DEPNAME-ATTACHINDEX-attachment" rel="attachment" href="..."> is inserted, where DEPNAME is name. The value of
ATTACHINDEX depends on whether attachment is named or not; if
so, then it's the name of the element, and if not, it's the 1-based index
of the element. JavaScript can retrieve the URL using something like
document.getElementById(depname + "-" + index + "-attachment").href.
Note that depending on the rendering context, the runtime value of the href
may be an absolute, relative, or data URI.
htmlDependency should not be called from the top-level of a package
namespace with absolute paths (or with paths generated by
system.file()) and have the result stored in a variable. This is
because, when a binary package is built, R will run htmlDependency
and store the path from the building machine's in the package. This path is
likely to differ from the correct path on a machine that downloads and
installs the binary package. If there are any absolute paths, instead of
calling htmlDependency at build-time, it should be called at
run-time. This can be done by wrapping the htmlDependency call in a
function.
Use attachDependencies() to associate a list of
dependencies with the HTML it belongs with.