set the global css/js for books and sites in the meta variable css2/js2, which can avoid the repetition of some css/js in YAML or _litedown.yml (if users want to completely avoid the global css/js, they can set css2/js2 to null)

Author: yihui

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: litedown
 Type: Package
 Title: A Lightweight Version of R Markdown
-Version: 0.5.14
+Version: 0.5.15
 Authors@R: c(
     person("Yihui", "Xie", role = c("aut", "cre"), email = "[email protected]", comment = c(ORCID = "0000-0003-0645-5666", URL = "https://yihui.org")),
     person("Tim", "Taylor", role = "ctb", comment = c(ORCID = "0000-0002-8587-7113")),

R/mark.R

@@ -422,7 +422,10 @@ build_output = function(format, options, template, meta, ...) {
     )
     for (i in setdiff(names(defaults), names(meta))) meta[[i]] = defaults[[i]]
     # special handling for css/js "files" that have no extensions
-    for (i in c('css', 'js')) meta[[i]] = resolve_files(c(meta[[i]], acc_var(i)), i)
+    for (i in c('css', 'js')) {
+      i2 = paste0(i, '2')  # treat css2/js2 as global base (e.g. for sites)
+      meta[[i]] = resolve_files(c(meta[[i2]], meta[[i]], acc_var(i)), i)
+    }
   }
   sub_vars(tpl, meta, ...)
 }

R/site.R

@@ -52,7 +52,7 @@ fuse_site = function(input = '.') {
   }
   opts = yaml_field(info$yaml, 'html', c('meta', 'options'))
   opts[['meta']] = merge_list(list(
-    css = c(site_css, '@site'), js = site_js,
+    css2 = c(site_css, '@site'), js2 = site_js,
     include_before = nav_menu(info), include_after = format(Sys.Date(), '© %Y')
   ), opts[['meta']])
   opts[['options']] = merge_list(
@@ -255,7 +255,7 @@ fuse_book = function(input = '.', output = NULL, envir = parent.frame()) {
     )
   })
   tweak_options(format, yaml, list(
-    body_class = '', css = c(site_css, '@book'), js = site_js
+    body_class = '', css2 = c(site_css, '@book'), js2 = site_js
   ), toc = length(preview) == 0)
   fuse_output(input[1], output, unlist(res), full)
 }

docs/_litedown.yml

@@ -8,5 +8,5 @@ output:
       toc:
         depth: 4
     meta:
-      css: ["@default", "@article", "@book", "@book-litedown", "@copy-button", "@heading-anchor", "@key-buttons", "@callout", "@tabsets", "@pages"]
-      js: ["@sidenotes", "@appendix", "@toc-highlight", "@chapter-toc", "@copy-button", "@external-link", "@heading-anchor", "@right-quote", "@key-buttons", "@callout", "@tabsets", "@pages"]
+      css: ["@book-litedown", "@key-buttons", "@callout", "@tabsets"]
+      js: ["@chapter-toc", "@external-link", "@right-quote", "@key-buttons", "@callout", "@tabsets"]

docs/index.Rmd

@@ -190,7 +190,7 @@ $$\mathrm{litedown} = \min{\{R\}} + \{D_i\} - \{D_e\} + \{J\}$$
 
 ```{mermaid}
 #| scope-litedown, echo = FALSE,
-#| fig.cap = 'A minimal partial re-implementation of the R Markdown ecosystem as **litedown**.'
+#| fig.cap = 'A minimal partial re-implementation of the R Markdown ecosystem as **litedown**, via [Chibaku Tensei](https://naruto.fandom.com/wiki/Chibaku_Tensei) (to [seal the nine tailed beasts](https://youtu.be/IqAD4np1g1s)).'
 classDiagram
   class litedown {
     +HTML/LaTeX

site/examples.Rmd

@@ -7,11 +7,14 @@ litedown::vest(css = 'https://cdn.jsdelivr.net/gh/yihui/litedown/inst/resources/
 ```
 
 ```{css, echo = FALSE}
-.box pre > code {
-  overflow: hidden;
-  text-overflow: ellipsis;
-  background: none;
-  &:not(:hover) {
+.box pre {
+  & > code {
+    overflow: hidden;
+    text-overflow: ellipsis;
+    background: none;
+  }
+  &:not(:focus) code {
+    cursor: pointer;
     display: -webkit-box;
     -webkit-box-orient: vertical;
     -webkit-line-clamp: 10;