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Title Object type File name Summary
FinishResponseSubscriberTest::testDefaultHeaders function core/tests/Drupal/Tests/Core/EventSubscriber/FinishResponseSubscriberTest.php Finish subscriber should set some default header values.
FinishResponseSubscriberTest::testExistingHeaders function core/tests/Drupal/Tests/Core/EventSubscriber/FinishResponseSubscriberTest.php Finish subscriber should not overwrite existing header values.
header-buttons-mobile.css file core/themes/olivero/css/components/header-buttons-mobile.css Header Mobile Buttons.
header-buttons-mobile.pcss.css file core/themes/olivero/css/components/header-buttons-mobile.pcss.css Header Mobile Buttons.
header-navigation.css file core/themes/olivero/css/components/header-navigation.css Navigation in header.
header-navigation.pcss.css file core/themes/olivero/css/components/header-navigation.pcss.css Navigation in header.
header-search-narrow.css file core/themes/olivero/css/components/header-search-narrow.css Header Search Narrow Block.
header-search-narrow.pcss.css file core/themes/olivero/css/components/header-search-narrow.pcss.css Header Search Narrow Block.
header-search-wide.css file core/themes/olivero/css/components/header-search-wide.css Header Search Wide Block.
header-search-wide.pcss.css file core/themes/olivero/css/components/header-search-wide.pcss.css Header Search Wide Block.
header-site-branding.css file core/themes/olivero/css/components/header-site-branding.css Site branding in header.
header-site-branding.pcss.css file core/themes/olivero/css/components/header-site-branding.pcss.css Site branding in header.
header-sticky-toggle.css file core/themes/olivero/css/components/header-sticky-toggle.css Sticky Header Toggle Button.
header-sticky-toggle.pcss.css file core/themes/olivero/css/components/header-sticky-toggle.pcss.css Sticky Header Toggle Button.
header.component.yml file core/profiles/demo_umami/themes/umami/components/header/header.component.yml core/profiles/demo_umami/themes/umami/components/header/header.component.yml
header.css file core/profiles/demo_umami/themes/umami/components/header/header.css .umami-header {
display: flex;
flex-wrap: wrap;
align-items: center;
justify-content: space-between;
padding: 0.75rem 4%;
}

/* Medium */
@media screen and (min-width: 48rem) {
/* 768px */
.umami-header {
padding-top: 0;
}
}

/*…
header.css file core/profiles/demo_umami/themes/umami/css/components/regions/header/header.css This file is used to style the header.
header.twig file core/profiles/demo_umami/themes/umami/components/header/header.twig <div{{ attributes.addClass('umami-header') }}>
<div class="umami-header__logo">
{% block logo %}{% endblock %}
</div>
<button
type="button"
class="umami-header__burger"
…
HeadersCacheContext class core/lib/Drupal/Core/Cache/Context/HeadersCacheContext.php Defines the HeadersCacheContext service, for "per header" caching.
HeadersCacheContext.php file core/lib/Drupal/Core/Cache/Context/HeadersCacheContext.php
HeadersCacheContext::getCacheableMetadata function core/lib/Drupal/Core/Cache/Context/HeadersCacheContext.php Gets the cacheability metadata for the context based on the parameter value.
HeadersCacheContext::getContext function core/lib/Drupal/Core/Cache/Context/HeadersCacheContext.php Returns the string representation of the cache context.
HeadersCacheContext::getLabel function core/lib/Drupal/Core/Cache/Context/HeadersCacheContext.php Returns the label of the cache context.
HeadersCacheContextTest class core/tests/Drupal/Tests/Core/Cache/Context/HeadersCacheContextTest.php @coversDefaultClass \Drupal\Core\Cache\Context\HeadersCacheContext
@group Cache
HeadersCacheContextTest.php file core/tests/Drupal/Tests/Core/Cache/Context/HeadersCacheContextTest.php
HeadersCacheContextTest::providerTestGetContext function core/tests/Drupal/Tests/Core/Cache/Context/HeadersCacheContextTest.php Provides a list of headers and expected cache contexts.
HeadersCacheContextTest::testGetContext function core/tests/Drupal/Tests/Core/Cache/Context/HeadersCacheContextTest.php @covers ::getContext
HtmlResponseAttachmentsProcessor::formatHttpHeaderAttributes function core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php Formats an attribute string for an HTTP header.
HtmlResponseAttachmentsProcessor::setHeaders function core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php Sets headers on a response object.
HtmlResponseAttachmentsTest::assertTeapotHeaders function core/modules/system/tests/src/Functional/Render/HtmlResponseAttachmentsTest.php Helper function to make assertions about added HTTP headers.
HtmlToTextTest::testHeaderSeparation function core/modules/system/tests/src/Unit/Mail/HtmlToTextTest.php Tests that headers are properly separated from surrounding text.
ImageStyleListBuilder::buildHeader function core/modules/image/src/ImageStyleListBuilder.php Builds the header row for the entity listing.
input--submit--header-search.html.twig file core/themes/olivero/templates/form/input--submit--header-search.html.twig Theme override for the search form submit button.
LanguageListBuilder::buildHeader function core/modules/language/src/LanguageListBuilder.php Builds the header row for the entity listing.
MailTest::testFromAndReplyToHeader function core/modules/system/tests/src/Kernel/Mail/MailTest.php Checks the From: and Reply-to: headers.
MediaListBuilder::buildHeader function core/modules/media/src/MediaListBuilder.php Builds the header row for the entity listing.
MediaTypeListBuilder::buildHeader function core/modules/media/src/MediaTypeListBuilder.php Builds the header row for the entity listing.
MenuListBuilder::buildHeader function core/modules/menu_ui/src/MenuListBuilder.php Builds the header row for the entity listing.
ModeratedNodeListBuilder::buildHeader function core/modules/content_moderation/src/ModeratedNodeListBuilder.php Builds the header row for the entity listing.
NodeListBuilder::buildHeader function core/modules/node/src/NodeListBuilder.php Builds the header row for the entity listing.
NodeTypeListBuilder::buildHeader function core/modules/node/src/NodeTypeListBuilder.php Builds the header row for the entity listing.
NodeViewTest::testLinkHeader function core/modules/node/tests/src/Functional/NodeViewTest.php Tests the Link header.
Page header for Classes page group core/core.api.php Introduction to classes
Page header for Elements page group core/lib/Drupal/Core/Render/theme.api.php Introduction to form and render elements
Page header for Namespaces page group core/core.api.php Introduction to namespaces
Page header for Services page group core/core.api.php Introduction to services
PageCache::HEADER constant core/modules/page_cache/src/StackMiddleware/PageCache.php Name of Page Cache's response header.
PageCacheAcceptHeaderController class core/modules/system/tests/modules/system_test/src/Controller/PageCacheAcceptHeaderController.php Defines a controller to respond the page cache accept header test.
PageCacheAcceptHeaderController.php file core/modules/system/tests/modules/system_test/src/Controller/PageCacheAcceptHeaderController.php
PageCacheAcceptHeaderController::content function core/modules/system/tests/modules/system_test/src/Controller/PageCacheAcceptHeaderController.php Processes a request that will vary with Accept header.

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