Select Specific Tables to Export from WP Multisite (phpMyAdmin)

export-multisite-install-to-standalone.js

// Choose "Custom" from the Export Page with your Database Selected
// Paste into Browser Console
// Swap "115" with your Site ID

jQuery( '.export_table_select tr .text-nowrap' ).each( function( index, table ) {

	if ( jQuery( table ).text().indexOf( 'wp_3' ) > -1 ) {
		jQuery( table ).closest( 'tr' ).find( 'input[type="checkbox"]' ).prop( 'checked', true );
	}

} );