LESS Content Filter

You're able to access a widget's LESS prior to it being converted to CSS by using the 'siteorigin_widgets_less_' . $this->id_base filter. This filter runs after the LESS variables from the widget instance have been injected.

/**
 * @param string $less The LESS content.
 * @param array $instance The widget instance.
 * @param SiteOrigin_Widget $widget The widget object.
 */
function wbe_filter_widget_less( $less, $instance, $widget ) {
    // Filter the LESS content here.
    return $less;
}
add_filter('siteorigin_widgets_less_sow-button', 'wbe_filter_widget_less', 10, 3);

If you want to make changes to the LESS prior to the variables being replaced, you can use the siteorigin_widgets_less_vars_' . $this->id_base instead.

/**
 * @param string $less The LESS content.
 * @param array $vars The widget LESS variables.
 * @param array $instance The widget instance.
 * @param SiteOrigin_Widget $widget The widget object.
 */
function wbe_filter_widget_less_vars( $less, $vars, $instance, $widget ) {
    // Filter the LESS content here.
    return $less;
}
add_filter( 'siteorigin_widgets_less_vars_sow-button', 'wbe_filter_widget_less_vars', 10, 4 );

Please note that siteorigin_widgets_less_vars_' . $this->id_base is run after WB has run all LESS .widget-function() callbacks and processed all LESS @imports.