Issue #3312292 by Dharti Patel: Phpcs coding standard issue

        var scroll_distance = parseInt(drupalSettings.scroll_distance);

        var scroll_speed = parseInt(drupalSettings.scroll_speed);

        var element_name = 'scrollTopButton-' + button_style;

        if (button_style == 'image') {

        var animationIn = 'show';

        var animationOut = 'hide';

        var animationSpeed = 0;

        var buttonVisible = false;

        var buttonVisible = FALSE;

        // set animation for the button

        if (button_animation == 'fade') {

            if ($(window).scrollTop() > scroll_distance) {

                if (!buttonVisible) {

                    $element[animationIn](animationSpeed);

                    buttonVisible = true;

                    buttonVisible = TRUE;

                }

            } else {

                if (buttonVisible) {

                    $element[animationOut](animationSpeed);

                    buttonVisible = false;

                    buttonVisible = FALSE;

                }

            }

        });