在R中修改Flexdashboard CSS：需修改的文件及位置咨询

Hey there! Let me walk you through how to tweak your flexdashboard's styling—whether you're using a custom CSS file (the recommended approach) or looking for the built-in files if you really need to dig into them.

Recommended: Use a Custom CSS File (Avoid Modifying Package Files) #

First off, don’t modify the default CSS files that come with the flexdashboard package—any changes you make will get overwritten when you update the package. Instead, create your own custom CSS file and link it to your R Markdown document:

1. Create a file named custom.css in the same folder as your .Rmd file.
2. Add your styling rules to this file. For example:
   • To adjust the main dashboard title size, color, and border:

     .navbar .navbar-brand {
       font-size: 2.2rem; /* Larger title font */
       color: #2d3436; /* Dark gray color */
       border-bottom: 3px solid #0984e3; /* Add a blue bottom border */
       padding-bottom: 8px; /* Adjust border position */
     }
     

   • To modify box borders for widgets or charts:

     .chart-wrapper {
       border: 2px solid #fd79a8; /* Pink border */
       border-radius: 10px; /* Rounded corners */
       margin: 12px 0; /* Adjust vertical spacing */
     }
     

3. Link the CSS file in your R Markdown YAML header:

   ---
   title: "My Custom Dashboard"
   output: 
     flexdashboard::flex_dashboard:
       css: custom.css
   ---
   

Locating Built-in flexdashboard CSS Files (If You Need to Inspect Them) #

If you want to reference the default styles to build your custom rules, here’s where to find the package files:

1. First, find your R library path by running this in the R console:

   .libPaths()
   

   This will return one or more paths where your R packages are installed.
2. Navigate to the flexdashboard folder within that path. The full path will look something like:
   • Windows: C:/Users/YourName/Documents/R/win-library/4.3/flexdashboard
   • macOS/Linux: ~/R/x86_64-pc-linux-gnu-library/4.3/flexdashboard
3. The core CSS files are in the inst/www/css/ subfolder:
   • main.css: Contains flexdashboard-specific styles for titles, layout, and widgets
   • bootstrap.min.css: The compressed Bootstrap framework styles that flexdashboard builds on
   • flexdashboard.css: Additional styles for components like tabs and value boxes

You can open these files in a text editor to see the default selectors and styles, then copy and modify those rules in your custom CSS file instead of editing the originals.

内容的提问来源于stack exchange，提问作者Ben