Twitter\WordPress\PluginLoader::publicInit PHP Method

    public static function publicInit()
    {
        // enhance web browser view only
        if (is_feed()) {
            return;
        }
        $features = \Twitter\WordPress\Features::getEnabledFeatures();
        // load widgets JS if a Twitter widget is active
        if (isset($features[\Twitter\WordPress\Features::FOLLOW_BUTTON]) && is_active_widget(false, false, \Twitter\WordPress\Widgets\Buttons\Follow::BASE_ID, true) || isset($features[\Twitter\WordPress\Features::PERISCOPE_ON_AIR]) && is_active_widget(false, false, \Twitter\WordPress\Widgets\Buttons\PeriscopeOnAir::BASE_ID, true)) {
            // enqueue after the script is registered in wp_enqueue_scripts action priority 1
            add_action('wp_enqueue_scripts', array('\\Twitter\\WordPress\\JavaScriptLoaders\\Widgets', 'enqueue'));
            // register DNS prefetch before WordPress resource hints run at wp_head priority 2
            add_action('wp_head', array('\\Twitter\\WordPress\\JavaScriptLoaders\\Widgets', 'dnsPrefetch'), 1);
        }
        // do not add content filters to HTTP 404 response
        if (is_404()) {
            return;
        }
        if (!isset($features[\Twitter\WordPress\Features::TWEET_BUTTON])) {
            return;
        }
        /**
         * Set the priority to apply to Twitter elements automatically added to the_content
         *
         * Allow publishers to adjust the order of Twitter buttons relative to other the_content actors
         *
         * @since 1.0.0
         *
         * @param int $priority filter priority
         */
        $twitter_content_priority = apply_filters('twitter_content_filter_priority', 15);
        // possibly add Tweet button(s)
        add_filter('the_content', array('\\Twitter\\WordPress\\Content\\Buttons\\Tweet', 'contentFilter'), $twitter_content_priority);
    }