How to plot country-based choropleths using leaflet R - json

Question

World boundaries geo.json downloaded from here.https://github.com/johan/world.geo.json
I am trying to highlight 3 countries(in a world map view) and paint them in gradient color according to numbers of projects in that country.
Here're my steps:
Firstly download world boundary geo.json file and read it as the basemap;
Then I try highlight the country polygons in my data. However it turns out that All the world countries are ramdomly colored and labeled by the 3 countries' information. Is it geo dataframe subsetting issue?
WorldCountry <-geojsonio::geojson_read("./GeoData/countries.geo.json", what = "sp")
#Dataframe for choropleth map
Country <- c("Bulgaria","Pakistan","Turkey")
Projects <- c(2,1,6)
data <- data.frame(Country,Projects)
#basemap
Map <- leaflet(WorldCountry) %>% addTiles() %>% addPolygons()
#set bin and color for choropleth map
bins <- c(0,1,2,3,4,5,6,7,8,9,10,Inf)
pal <- colorBin("YlOrRd", domain = data$Projects, bins = bins)
#set labels
labels <- sprintf(
"<strong>%s</strong><br/>%g projects <sup></sup>",
data$Country, data$Projects) %>% lapply(htmltools::HTML)
#add polygons,labels and mouse over effect
Map %>% addPolygons(
fillColor = ~pal(data$Projects),
weight = 2,
opacity = 1,
color = 'white',
dashArray = '3',
fillOpacity = 0.7,
highlight = highlightOptions(
weight = 5,
color = "#666",
dashArray = "",
fillOpacity = 0.7,
bringToFront = TRUE),
label = labels,
labelOptions = labelOptions(
style = list("font-weight" = "normal", padding = "3px 8px"),
textsize = "15px",
direction = "auto")
)
I am expecting something like this:

Answer 1

This will do the trick! Subset the WorldCountry using:
data_Map <- WorldCountry[WorldCountry$id %in% data$Country, ]
Map <- leaflet(data_Map) %>% addTiles() %>% addPolygons()

Answer 2

The subset would be with WorldCountry$name
data_Map <- WorldCountry[WorldCountry$name %in% data$Country, ]
Map <- leaflet(data_Map) %>% addTiles() %>% addPolygons(
fillColor = ~pal(data$Projects),
weight = 2,
opacity = 1,
color = 'white',
dashArray = '3',
fillOpacity = 0.7,
highlight = highlightOptions(
weight = 5,
color = "#666",
dashArray = "",
fillOpacity = 0.7,
bringToFront = TRUE),
label = labels,
labelOptions = labelOptions(
style = list("font-weight" = "normal", padding = "3px 8px"),
textsize = "15px",
direction = "auto")
)