Modifying subelements of R shiny widgets - dateRangeInput selected date font size

You can modify the font size of the selected date in a dateRangeInput widget in R Shiny using CSS. Here is an example:

library(shiny)

ui <- fluidPage(
  tags$head(
    tags$style(HTML("
      /* Modify the font size of the selected date */
      .input-daterange input[type='text']:not(.form-control) {
        font-size: 20px;
      }
    "))
  ),
  dateRangeInput("date_range", label = NULL, start = Sys.Date(), end = Sys.Date()+7)
)

server <- function(input, output, session) {}

shinyApp(ui, server)

In this example, we use the tags$style function to add some custom CSS to the page header. The CSS selector .input-daterange input[type='text']:not(.form-control) targets the input boxes within the dateRangeInput widget that are not part of a form-control class (i.e. the selected date), and sets their font size to 20px. You can modify the font size value to your preferred size.

Related articles:

How to Modify DateRangeInput Subelements in R Shiny for Customized User Experience
R Shiny is a platform for creating interactive web applications using the R programming language. One common input tool used in these applications is the DateRangeInput widget. This widget allows users to select a date range using two calendars. By default, the widget has subelements for the start date, end date, and apply button. However, you can modify these subelements to provide a more customized user experience.

Changing the Font Size of the Selected Date in R Shiny DateRangeInput Widgets
R Shiny is a web application framework that allows the creation of interactive web applications using the R programming language. One of the most popular widgets used in R Shiny applications is the DateRangeInput widget, which allows the selection of a date range between two dates. When a date range is selected, the selected dates are displayed in a box below the widget.

Advanced Techniques for Modifying Subelements of R Shiny Widgets: Altering DateRangeInput Appearance
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