public static function Element::isEmpty in Drupal 9

Same name and namespace in other branches

1. 8 core/lib/Drupal/Core/Render/Element.php \Drupal\Core\Render\Element::isEmpty()

Indicates whether the given element is empty.

An element that only has #cache set is considered empty, because it will render to the empty string.

Parameters

array $elements: The element.

Return value

bool Whether the given element is empty.

7 calls to Element::isEmpty()

BlockComponentRenderArray::onBuildRender in core/modules/layout_builder/src/EventSubscriber/BlockComponentRenderArray.php

Builds render arrays for block plugins and sets it on the event.

BlockViewBuilder::preRender in core/modules/block/src/BlockViewBuilder.php

#pre_render callback for building a block.

ElementTest::testIsEmpty in core/tests/Drupal/Tests/Core/Render/ElementTest.php

@covers ::isEmpty

EntityViewDisplay::buildMultiple in core/lib/Drupal/Core/Entity/Entity/EntityViewDisplay.php

Builds a renderable array for the components of a set of entities.

LayoutBuilderEntityViewDisplay::buildMultiple in core/modules/layout_builder/src/Entity/LayoutBuilderEntityViewDisplay.php

Builds a renderable array for the components of a set of entities.

... See full list

File

core/lib/Drupal/Core/Render/Element.php, line 198

Class

Element

Provides helper methods for Drupal render elements.

Namespace

Drupal\Core\Render

Code

public static function isEmpty(array $elements) {
  return empty($elements) || count($elements) === 1 && array_keys($elements) === [
    '#cache',
  ];
}