I would like to add additional styles to the styles.css file before it is sent to the client. Is this possible?

Currently styles.css contains :

Theme Name: My Theme
Theme URI: https://example.com/themes/vanilla/


html {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    font-size: 62.5%;
    overflow-y: scroll;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;


I would like to add additional CSS dynamically to the end of that file. Is that possible?

For example, in my index.php:

if ( have_posts() ) : 

   while ( have_posts() ) : the_post();
   // normal post stuff

    moreCSS = $myPost->moreCSS;

  • This wouldn't be the most efficient method, you should either output it dynamically at runtime or enqueue a new stylesheet written by your code
    – Tom J Nowell
    Commented Oct 15, 2015 at 0:04
  • How would I enqueue it? Commented Oct 15, 2015 at 0:06

1 Answer 1


You can enqueue a different stylesheet only for index.php using conditional tags

The following code should be added in functions.php

 * Proper way to enqueue scripts and styles
function theme_name_scripts() 
 if ( is_home() ) 
      wp_enqueue_style( 'style-name',  get_template_directory_uri() .   "/path_to_file/yourStylesheet.css' ); 

add_action( 'wp_enqueue_scripts', 'theme_name_scripts' );
  • Thank you. In my case I don't have a CSS file to link to. What I want to do is add more CSS to the existing styles.css. From your link on enqueue I found this function, codex.wordpress.org/Function_Reference/wp_add_inline_style. I think that will do what I want but I'm not sure where to put it. Commented Oct 16, 2015 at 0:04
  • You can add it into the functions.php and call it with add_action '<?php function my_styles_method() { wp_enqueue_style( 'custom-style', get_template_directory_uri() . '/css/custom_script.css' ); $color = get_theme_mod( 'my-custom-color' ); //E.g. #FF0000 $custom_css = " .mycolor{ background: {$color}; }"; wp_add_inline_style( 'custom-style', $custom_css ); } add_action( 'wp_enqueue_scripts', 'my_styles_method' );' ?>
    – julia
    Commented Oct 20, 2015 at 13:16

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