fix default alpha_off

inst/htmljs/animint.js

@@ -1083,7 +1083,7 @@ var animint = function (to_select, json_file) {
       return linetypesize2dasharray(lt, get_size(d));
     };
 
-    var alpha = 1, alpha_off;
+    var alpha = 1, alpha_off = 0.5;
     var get_alpha;
     if(aes.hasOwnProperty("alpha")){
       get_alpha = get_attr("alpha");

tests/testthat/test-renderer1-geom-text-color.R

@@ -1,6 +1,5 @@
 acontext("geom text color")
 library(animint2)
-
 df <- data.frame(x=1,y="foo")
 viz <- animint(
   text=ggplot()+
@@ -9,20 +8,25 @@ viz <- animint(
     scale_color_manual(values=c(foo="blue"))+
     geom_text(aes(x, 2, label=y), color="red", data=df)+
     geom_text(aes(x, 1, label=y), color="black", color_off="pink", clickSelects="y", data=df))
+
 info <- animint2HTML(viz)
 test_that("geom_text color rendered as fill style", {
   fill <- getStyleValue(info$html, '//text[@class="geom"]', "fill")
   expect_color(fill, c("black", "blue","red","black"))
   opacity <- getStyleValue(info$html, '//text[@class="geom"]', "opacity")
   expect_identical(opacity, c("1","1","1","1"))
 })
+
 clickID("plot_text_y_variable_foo_svg")#or foo_label?
 after.html <- getHTML()
 test_that("geom_text color rendered as fill style", {
   fill <- getStyleValue(after.html, '//text[@class="geom"]', "fill")
   print(fill)
   expect_color(fill, c("black", "red","pink"))
+})
+
+test_that("default text alpha_off correct", {
   opacity <- getStyleValue(after.html, '//text[@class="geom"]', "opacity")
   print(opacity)
-  expect_identical(opacity, c("0.5","1","1"))
+  expect_identical(opacity, c("0.5","1","0.5"))
 })