更改networkD3绘图的背景色

假设我使用包中的最小示例绘制一个networkD3图

#
library(networkD3)

# Load data
data(MisLinks)
data(MisNodes)

# Plot
forceNetwork(Links = MisLinks, Nodes = MisNodes,
            Source = "source", Target = "target",
            Value = "value", NodeID = "name",
            Group = "group", opacity = 0.8)

如果我在浏览器中打开它，我可以使用开发人员工具将主体的背景色更改为，例如背景色：DAE3F9

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有没有一种方法可以在不在浏览器中打开的情况下，自动将打印的背景颜色从默认白色定义为另一种颜色？基本上，我们可以像添加JS函数一样直接将CSS添加到代码中吗？

我的技巧如下。这并不漂亮，但我在linkDistance参数中添加了一个函数来完成这些脏活。希望最终会有人提出一个不那么麻烦的解决方案：

forceNetwork(Links = MisLinks, Nodes = MisNodes,
  Source = "source", Target = "target",
  Value = "value", NodeID = "name",
  Group = "group", opacity = 0.8,
  linkDistance = 
    JS('function(){d3.select("body").style("background-color", "#DAE3F9"); return 50;}'))

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另一个类似的不吸引人的选项是添加clickAction参数，例如clickAction='d3.selectbody.stylebackground-color，DAE3F9'，但这只会在用户单击节点时更改背景。

如果可能，我们可以通过几种方式使用htmltools提供的帮助

library(networkD3)

# Load data
data(MisLinks)
data(MisNodes)

# Plot
forceNetwork(Links = MisLinks, Nodes = MisNodes,
             Source = "source", Target = "target",
             Value = "value", NodeID = "name",
             Group = "group", opacity = 0.8)

library(htmltools)

# don't like using the !important modifier
#  but without script not sure there is another way
#  to override the default white background
browsable(
  tagList(
    tags$head(
      tags$style('body{background-color: #DAE3F9 !important}')
    ),
    forceNetwork(Links = MisLinks, Nodes = MisNodes,
                 Source = "source", Target = "target",
                 Value = "value", NodeID = "name",
                 Group = "group", opacity = 0.8)
  )
)

# if you want to limit the background-color to
#  the htmlwidget, we could wrap in tags$div
browsable(
  tags$div(
    style = "background-color:#DAE3F9;",
    forceNetwork(Links = MisLinks, Nodes = MisNodes,
                 Source = "source", Target = "target",
                 Value = "value", NodeID = "name",
                 Group = "group", opacity = 0.8)
  )
)

# if you are ok with script then we
#  we could do something like this
browsable(
  tagList(
    forceNetwork(Links = MisLinks, Nodes = MisNodes,
                 Source = "source", Target = "target",
                 Value = "value", NodeID = "name",
                 Group = "group", opacity = 0.8),
    tags$script(
'
document.body.style.backgroundColor = "#DAE3F9"
'      
    )
  )
)

---

哈这是一种非常简洁/有趣的方法——它从未劫持过另一个参数。我认为它工作正常，但也许有更好的方法。我在想这是否会有任何不必要的副作用，但似乎效果不错。@jalapic我很有创意！不确定副作用。FWIW，如果实现了关于更改背景颜色的功能请求，可能会直接实现更好的方法：