understrap/inc/widgets.php

<?php
/**
 * Declaring widgets
 *
 *
 * @package understrap
 */
if ( ! function_exists ( 'understrap_widgets_init' ) ) {
    function understrap_widgets_init() {
    	register_sidebar( array(
    		'name'          => __( 'Sidebar', 'understrap' ),
    		'id'            => 'sidebar-1',
    		'description'   => 'Sidebar widget area',
    		'before_widget' => '<aside id="%1$s" class="widget %2$s">',
    		'after_widget'  => '</aside>',
    		'before_title'  => '<h3 class="widget-title">',
    		'after_title'   => '</h3>',
    	) );

        register_sidebar( array(
            'name'          => __( 'Hero Slider', 'understrap' ),
            'id'            => 'hero',
            'description'   => 'Hero slider area. Place two or more widgets here and they will slide!',
            'before_widget' => '<div class="item">',
            'after_widget'  => '</div>',
            'before_title'  => '',
            'after_title'   => '',
        ) );

        register_sidebar( array(
            'name'          => __( 'Hero Static', 'understrap' ),
            'id'            => 'statichero',
            'description'   => 'Static Hero widget. no slider functionallity',
            'before_widget' => '',
            'after_widget'  => '',
            'before_title'  => '',
            'after_title'   => '',
        ) );

            register_sidebar( array(
            'name'          => __( 'Footer Full', 'understrap' ),
            'id'            => 'footerfull',
            'description'   => 'Widget area below main content and above footer',
            'before_widget' => '',
            'after_widget'  => '',
            'before_title'  => '',
            'after_title'   => '',
        ) );

    }
}
add_action( 'widgets_init', 'understrap_widgets_init' );