css for downlit links

Author: jjallaire

src/resources/formats/html/bootstrap/_bootstrap-rules.scss

@@ -1621,6 +1621,12 @@ p.subtitle {
   margin-bottom: 0.5em;
 }
 
+// downlit links
+code a:any-link {
+  color: inherit;
+  text-decoration-color: $gray-600;
+}
+
 // This is a sentinel value that renderers can use to determine
 // whether the theme is dark or light
 @if (quarto-color.blackness($body-bg) > $code-block-theme-dark-threshhold) {

src/resources/rmd/rmd.R

@@ -34,7 +34,10 @@
   postprocess <- function(input, format, output, preserved_chunks) {
 
     # check for html output
-    isHTML <- is_html_output(format)
+    isHTML <-  knitr::is_html_output(
+      format$pandoc$to, 
+      c("markdown", "epub", "gfm", "commonmark", "commonmark_x", "markua")
+    )
 
     # bail if we don't have any perserved chunks and aren't doing code linking
     code_link <- isHTML && isTRUE(format$render$`code-link`)