Function isElementVisible

docs/app/js/sanddance-app.js:24662–24671

(element)

    return null;
}
function isElementVisible(element) {
    // If the element is not valid, return false.
    if (!element || !element.getAttribute) return false;
    var visibilityAttribute = element.getAttribute(IS_VISIBLE_ATTRIBUTE);
    // If the element is explicitly marked with the visibility attribute, return that value as boolean.
    if (visibilityAttribute !== null && visibilityAttribute !== undefined) return visibilityAttribute === "true";
    // Fallback to other methods of determining actual visibility.
    return element.offsetHeight !== 0 || element.offsetParent !== null || // eslint-disable-next-line @typescript-eslint/no-explicit-any
    element.isVisible === true; // used as a workaround for testing.
}
function isElementTabbable(element, checkTabIndex) {
    // If this element is null or is disabled, it is not considered tabbable.
    if (!element || element.disabled) return false;