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Title Object type File name Summary
Feed::setHeaders function core/modules/views/src/Plugin/views/display/Feed.php Sets headers on a response object.
FieldConfigListBuilder::buildHeader function core/modules/field_ui/src/FieldConfigListBuilder.php Builds the header row for the entity listing.
FieldStorageConfigListBuilder::buildHeader function core/modules/field_ui/src/FieldStorageConfigListBuilder.php Builds the header row for the entity listing.
FieldUiTestTrait::assertTableHeaderExistsByLabel function core/modules/field_ui/tests/src/Traits/FieldUiTestTrait.php Asserts that a header cell appears on a table.
File::getDownloadHeaders function core/modules/file/src/Entity/File.php Examines a file entity and returns content headers for download.
FileInterface::getDownloadHeaders function core/modules/file/src/FileInterface.php Examines a file entity and returns content headers for download.
FileUploadResourceTestBase::testPostFileUploadInvalidHeaders function core/modules/rest/tests/src/Functional/FileUploadResourceTestBase.php Tests using the file upload POST route with invalid headers.
FileUploadTest::testPostFileUploadInvalidHeaders function core/modules/jsonapi/tests/src/Functional/FileUploadTest.php Tests using the file upload POST route with invalid headers.
file_get_content_headers function core/modules/file/file.module Examines a file entity and returns appropriate content headers for download.
FilterFormatListBuilder::buildHeader function core/modules/filter/src/FilterFormatListBuilder.php Builds the header row for the entity listing.
FinishResponseSubscriber::addDebugCacheHeaders function core/lib/Drupal/Core/EventSubscriber/FinishResponseSubscriber.php Adds cache metadata information as headers in the response.
FinishResponseSubscriber::RESPONSE_HEADER_CACHE_ITEM_SEPARATOR constant core/lib/Drupal/Core/EventSubscriber/FinishResponseSubscriber.php Separator between cache tags and cache context in respective debug headers.
FinishResponseSubscriber::RESPONSE_HEADER_LINE_MAX_LENGTH constant core/lib/Drupal/Core/EventSubscriber/FinishResponseSubscriber.php The character length limit for Drupal cache headers.
FinishResponseSubscriberTest::testDebugCacheTagAndCacheContextsHeadersLength function core/tests/Drupal/Tests/Core/EventSubscriber/FinishResponseSubscriberTest.php Tests that long tags and contexts headers are split into multiple lines.
FinishResponseSubscriberTest::testDebugHeaders function core/tests/Drupal/Tests/Core/EventSubscriber/FinishResponseSubscriberTest.php Finish subscriber outputs tags, context, max-age if debug is on.
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/css/components/regions/header/header.css This file is used to style the header.
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.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 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 Tests Drupal\Core\Cache\Context\HeadersCacheContext.
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 Tests get context.
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.
Htmx::applyHeaders function core/lib/Drupal/Core/Htmx/Htmx.php Apply the header values to the render array.
Htmx::getHeaders function core/lib/Drupal/Core/Htmx/Htmx.php Get the header storage.
Htmx::hasHeader function core/lib/Drupal/Core/Htmx/Htmx.php Checks if a header is set.
Htmx::headers function core/lib/Drupal/Core/Htmx/Htmx.php Creates a `data-hx-headers` attribute.

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