Function displayed

javascript/atoms/typescript/is-displayed.ts:473–510

(node: Node)

  }

  function displayed(node: Node): boolean {
    var cached = displayedCache.get(node);
    if (cached !== undefined) {
      return cached;
    }

    if (isElement(node)) {
      var display = getEffectiveStyle(node, 'display');
      var contentVisibility = getEffectiveStyle(node, 'content-visibility');
      if (display === 'none' || contentVisibility === 'hidden') {
        displayedCache.set(node, false);
        return false;
      }
    }

    var parent = getParentNodeInComposedDom(node);
    if (typeof ShadowRoot === 'function' && parent instanceof ShadowRoot) {
      if (parent.host.shadowRoot && parent.host.shadowRoot !== parent) {
        displayedCache.set(node, false);
        return false;
      }
      parent = parent.host;
    }

    if (parent && (parent.nodeType === Node.DOCUMENT_NODE || parent.nodeType === Node.DOCUMENT_FRAGMENT_NODE)) {
      displayedCache.set(node, true);
      return true;
    }

    if (isElement(parent, 'DETAILS') && !(<HTMLDetailsElement>parent).open && !isElement(node, 'SUMMARY')) {
      displayedCache.set(node, false);
      return false;
    }

    var result = !!parent && displayed(parent);
    displayedCache.set(node, result);
    return result;
  }

  return isShownInternal(elem, !!optIgnoreOpacity, displayed);
})