title: Why shinydashboard changes the corner of a numericInput from round to 90 degree?
body: <p>I have the following two scripts creating one <code>numericInput</code> and one <code>selectInput</code> fields. One is in <code>shiny</code>, and the other is in <code>shinydashboard</code>. I also created shinyapps.io link to these two examples.</p>
  
  <p>My question is why <code>shinydashboard</code> changes the corner of the <code>numericInput</code> to be 90 degrees? Please see the screenshots. In example 1, both input fields have round corners.</p>
  
  <p><a href="https://i.stack.imgur.com/36QO2.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/36QO2.png" alt="enter image description here"></a></p>
  
  <p>However, in example 2, the corner of the <code>numericInput</code> becomes 90 degrees.</p>
  
  <p><a href="https://i.stack.imgur.com/3nizN.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3nizN.png" alt="enter image description here"></a></p>
  
  <p>It would be great if someone can help me understand this behavior and develop a way to make all the corners either round or 90 degrees. </p>
  
  <p><strong>Example 1</strong> (<a href="https://yuchenw.shinyapps.io/Corner_Input_Example1/" rel="nofollow noreferrer">https://yuchenw.shinyapps.io/Corner_Input_Example1/</a>)</p>
  
  <pre><code># Load the packages
  library(shiny)
  
  # User Interface
  ui &lt;- fluidPage(
    numericInput(inputId = "Number", label = "A numericInput with round corner", value = NA),
    selectInput(inputId = "Select", label = "A selectInput with round corner", choices = 1:3)
  )
  
  server &lt;- function(input, output, session){
  }
  
  # Run the app
  shinyApp(ui, server)
  </code></pre>
  
  <p><strong>Example 2</strong> (<a href="https://yuchenw.shinyapps.io/Corner_Input_Example2/" rel="nofollow noreferrer">https://yuchenw.shinyapps.io/Corner_Input_Example2/</a>)</p>
  
  <pre><code># Load the packages
  library(shiny)
  library(shinydashboard)
  
  # User Interface
  ui &lt;- dashboardPage(
      header = dashboardHeader(title = ""),
      sidebar = dashboardSidebar(
        sidebarMenu(
          menuItem(
            text = "Example",
            tabName = "tab1"
          )
        )
      ),
      body = dashboardBody(
        tabItems(
          tabItem(
            tabName = "tab1",
            numericInput(inputId = "Number", label = "A numericInput with 90-degree corner", value = NA),
            selectInput(inputId = "Select", label = "A selectInput with round corner", choices = 1:3)
          )
        )
      )
    )
  
  server &lt;- function(input, output, session){
  }
  
  # Run the app
  shinyApp(ui, server)
  </code></pre>