Anchor link position tweak

Anchor-link-position-tweak.js

<script>
jQuery(function($) {
		window.et_pb_smooth_scroll = function( $target, $top_section, speed, easing ) {
			var $window_width = $( window ).width();
			$menu_offset = -12;
		   var headerHeight = 50; // for desktop
			if ( $window_width <= 980 ) {
				var headerHeight = 200; // for mobile value
				}
				$menu_offset += headerHeight;
			
			if ( $ ('#wpadminbar').length && $window_width > 980 ) {
				$menu_offset += $( '#wpadminbar' ).outerHeight();
				}
			//fix sidenav scroll to top
			if ( $top_section ) {
				$scroll_position = 0;
			} else {
				$scroll_position = $target.offset().top - $menu_offset;
			}
			// set swing (animate's scrollTop default) as default value
			if( typeof easing === 'undefined' ){
				easing = 'swing';
			}
			$( 'html, body' ).animate( { scrollTop :  $scroll_position }, speed, easing );
		}

});
</script>