WordPress Debugging Options

wp-config.php

// general PHP and WordPress warnings, error messages and status information

define( 'WP_DEBUG', true );
define( 'WP_DEBUG_LOG', true );
define( 'WP_DEBUG_DISPLAY', false );
define( 'WPS_DEBUG', true );

// script and style 

define( 'WPS_DEBUG_SCRIPTS', true );
define( 'WPS_DEBUG_STYLES', true );
We would also recommend to clear any caches after script or style debugging has been enabled or disabled.

// DOM parcing

define( 'WPS_DEBUG_DOM', true );