R shiny fix sidebarPanel width to a specific pixels value?

Question

How can I fix the sidebarPanel width to a specific value in pixels, instead of taking up a proportion of the total width compared to mainPanel?

Answer 1

This should get you started:

sidebarPanel(
  tags$head(
    tags$style(type="text/css", "select { max-width: 140px; }"),
    tags$style(type="text/css", ".span4 { max-width: 190px; }"),
    tags$style(type="text/css", ".well { max-width: 180px; }")
  ),

  ...

)