How to load certain scripts only on single pages of custom post type in wordpress?

Question

This following fails to load the scripts in the single pages,

if(is_single( ) ) add_action('wp_enqueue_scripts', 'build_js');

Suppose, If i use

add_action('wp_enqueue_scripts', 'build_js');

the action is performed and scripts are loaded.

I need to perform the action only on single pages of a custom post type. How to do this?

Answer 1

the problem is you have to check for the single page into the function:

function build_js(){
    if( is_single() && get_post_type()=='CustomPostTypeName' ){
        wp_enqueue_script(....);
    }
}
add_action('wp_enqueue_scripts', 'build_js');

instead of

if(is_single( ) ) add_action('wp_enqueue_scripts', 'build_js');

Answer 2

You can simplify the logic further with the Wordpress function is_singular() instead.

function build_js(){
  if( is_singular('CustomPostTypeName') ) {
    wp_enqueue_script(....);
  }
}
add_action('wp_enqueue_scripts', 'build_js');