On 01/06/2020 9:15 a.m., Bryan Hanson wrote:
Duncan, I don’t think it is a particularly clever or efficient example,
but my package exCon does some of what you describe. Additional
disclaimer: I’m not very good at serious Javascript, and find the
scoping rules challenging. Even so, exCon works pretty well on large
data sets. But you may be more interested in the infrastructure aspects.
Thanks! I hadn't thought of using js::uglify_optimize().
I'd like to do the minification during package install rather than when
used, and this appears to work in the R source code (at top level):
text <-
readLines(system.file("htmlwidgets/lib/rglClass/rglClass.src.js",
package = "rgl"))
if (requireNamespace("js", quietly = TRUE))
text <- js::uglify_optimize(text)
writeLines(text, file.path(system.file("htmlwidgets/lib/rglClass",
package = "rgl"), "rglClass.js"))
rm(text)
I'm not completely sure this is supported/allowed, though I don't see a
CRAN rule to disallow it.
Now I can work on splitting up the big file, and doing a somewhat more
complicated install of rglClass.js.
Duncan Murdoch
https://cran.r-project.org/package=exCon
The gathering of separate .js files, minifying and deployment are
handled in the main function exCon.R. Javascript and html files in
inst/extdata.
Bryan
****************
Prof. Bryan Hanson (emeritus)
Dept of Chemistry & Biochemistry
DePauw University
Greencastle IN 46135 USA
Web: academic.depauw.edu/~hanson/index.html
<http://academic.depauw.edu/~hanson/index.html>
Repo: github.com/bryanhanson <http://github.com/bryanhanson>
Nerdy Blog: ChemoSpec.org <http://ChemoSpec.org>
The Twit: @ProfBryanHanson
I’m usually @ -4 GMT/UTC
On Jun 1, 2020, at 7:44 AM, Duncan Murdoch <murdoch.dun...@gmail.com
<mailto:murdoch.dun...@gmail.com>> wrote:
The rgl package includes a large amount of Javascript source to handle
the display of output in browsers using rglwidget(). Currently this
is mostly in one big file
(inst/htmlwidgets/lib/rglClass/rglClass.src.js), but I'd like to make
some improvements:
- splitting it into separate files with related functions
- automatically "compiling" it into a single file stripped of white
space and comments, for faster loading.
Unfortunately, I have no other experience writing a Javascript
library, so I really don't know what I'm doing. Can anyone point me
to other R packages containing htmlwidgets that do this "properly", or
point to instructions for the standard workflow for Javascript library
development outside of R that I could adapt?
Duncan Murdoch
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