WordPress Plugin to run on specific pages

TheWebLife

I have developed a new WordPress plugin and I included a few CSS and JavaScript libraries in this.

I have noticed that these includes are loaded onto all pages not just the pages I have included the short code for my plugin. This will clearly impact performance loading unnecessary scripts/styles.

Is there a function within WordPress where you can set a condition on what pages a Wordpress plugin can run on?

I am loading in the scripts/CSS like this within my php:

function my_function() {
wp_register_script( 'example', plugins_url('/scripts/example.js', __FILE__ ) );
wp_register_style('example', plugins_url( '/example/example.css', __FILE__ ) );
wp_enqueue_style('example);
wp_enqueue_script('example');
}

add_action( 'wp_enqueue_scripts', 'my_function' );

mneylon

You'd need to dig around the Wordpress codex a bit:
https://codex.wordpress.org/Writing_a_Plugin#Template_Tags

daymobrew

If you know the page ID, title or slug you can use is_page().

Talisman

For including JavaScript for a plugin I usually add a hook to the function which handles the shortcode.

function lets_do_example_shortcode( $atts ) {
  ...
  // add hook for loading scripts
  do_action( 'lets_do_example_hook' );
}

// register function for hook
add_action( 'lets_do_example_hook', 'include_my_scripts' );

function include_my_scripts() {
  wp_register_script( 'jquery-tooltipster', PLUGIN_URL."js/jquery.tooltipster.min.js", array('jquery'), null, true );
  // register the plugin JavaScript file
  wp_register_script( 'my-plugin-js', PLUGIN_URL."js/my-plugin.js", array('jquery','jquery-ui','jquery-tooltipster'), null, true );
  // add the JavaScript file to the page footer
  wp_enqueue_script( 'my-plugin-js', null, true );
}

You can use the same technique to inline CSS code.