optional

osbo.com ▸ CSS ▸ Pseudo-Classes ▸ optional

The optional CSS pseudo-class applies when an element is optional.

Syntax

selector:optional
{
    property: value;
}

Examples

Links

Internal

External

World Wide Web Consortium (W3C)

JESUS

BIBLE

Overview

Overview

Download

Download

العربية

ASVD الكتاب المقدس ترجمة فانديك وسميث

česky

CSBKR Bible Kralická 1613

Dansk

DA1871 Danske Bibel 1871

Deutsch

DELUT Luther Bible 1912 ELB Elberfelder 1905 ELB71 Elberfelder 1871

English

ASV American Standard Version KJV King James Version WEB World English Bible

Español

RVES Reina-Valera Antigua

Suomi

FI1776 Finnish 1776 FINPR Finnish 1938

Français

FMAR Martin 1744 FRDBY Bible Darby en français LSG Louis Segond 1910 OST Ostervald

Magyar

KAR Károli 1590

Bahasa Indonesia

IDBAR Terjemahan Baru

Italiano

IGD Giovanni Diodati Bibbia ITRIV Italian Riveduta 1927

日本語

JA1955 Colloquial Japanese (1955)

Malagasy

MG1865 Malagasy Bible

te reo Māori

MAOR Maori Bible

한국어

KORVB 개역한글

Nederlands

SV1750 Statenvertaling

Norsk

NORSK Det Norsk Bibelselskap 1930

Polski

PBG Biblia Gdańska

Português

AA Almeida Atualizada

Română

RMNN Romanian Cornilescu 1928 VDC Versiunea Dumitru Cornilescu VDCC Versiunea Dumitru Cornilescu Corectată

Pyccкий

RURSV Синодальный перевод

Shqip

ALBB Albanian Bible

Svenska

SK73 Karl XII 1873 SVEN Svenska 1917

Wikang Tagalog

TLAB Ang Biblia

українська

UBIO Біблія в пер. Івана Огієнка, 1962 UKRK Біблія в пер. П.Куліша та І.Пулюя, 1905

Tiếng Việt

VI1934 1934 Vietnamese Bible

简体中文

CUVS 简体和合本

繁體中文

HTML

Overview

Overview

Attributes

accesskey autocapitalize class contenteditable data dir draggable hidden id inputmode lang spellcheck style tabindex title

Elements

!doctype a abbr address area article aside audio b base bdi bdo blockquote body br button canvas caption cite code col colgroup data datalist dd del details dfn dialog div dl dt em embed fieldset figcaption figure footer form h1 h2 h3 h4 h5 h6 head header hgroup hr html i iframe img input ins kbd label legend li link main map mark meta meter nav noscript object ol optgroup option output p param picture pre progress q rb rp rt rtc ruby s samp script section select slot small source span strong style sub summary sup table tbody td template textarea tfoot th thead time title tr track u ul var wbr

Other

Characters Comments Datatypes

CSS

Overview

Overview

Properties

align-content align-items align-self all animation animation-delay animation-direction animation-duration animation-fill-mode animation-iteration-count animation-name animation-play-state animation-timing-function backdrop-filter backface-visibility background background-attachment background-blend-mode background-clip background-color background-image background-origin background-position background-repeat background-size block-ellipsis block-size border border-block border-block-color border-block-end border-block-end-color border-block-end-style border-block-end-width border-block-start border-block-start-color border-block-start-style border-block-start-width border-block-style border-block-width border-bottom border-bottom-color border-bottom-left-radius border-bottom-right-radius border-bottom-style border-bottom-width border-collapse border-color border-end-end-radius border-end-start-radius border-image border-image-outset border-image-repeat border-image-slice border-image-source border-image-width border-inline border-inline-color border-inline-end border-inline-end-color border-inline-end-style border-inline-end-width border-inline-start border-inline-start-color border-inline-start-style border-inline-start-width border-inline-style border-inline-width border-left border-left-color border-left-style border-left-width border-radius border-right border-right-color border-right-style border-right-width border-spacing border-start-end-radius border-start-start-radius border-style border-top border-top-color border-top-left-radius border-top-right-radius border-top-style border-top-width border-width bottom box-decoration-break box-shadow box-sizing caption-side caret caret-color caret-shape clear clip clip-path color color-scheme column-count column-fill column-gap column-rule column-rule-color column-rule-style column-rule-width column-span column-width columns contain content content-visibility continue counter-increment counter-reset counter-set cursor direction display empty-cells filter flex flex-basis flex-direction flex-flow flex-grow flex-shrink flex-wrap float font font-family font-feature-settings font-kerning font-optical-sizing font-size font-size-adjust font-style font-variant font-variant-caps font-variant-numeric font-variant-position font-variation-settings font-weight gap grid grid-area grid-auto-columns grid-auto-flow grid-auto-rows grid-column grid-column-end grid-column-start grid-row grid-row-end grid-row-start grid-template grid-template-areas grid-template-columns grid-template-rows height hyphens inline-size inset inset-block inset-block-end inset-block-start inset-inline inset-inline-end inset-inline-start isolation justify-content justify-items justify-self left letter-spacing line-break line-clamp line-height list-style list-style-image list-style-position list-style-type margin margin-block margin-block-end margin-block-start margin-bottom margin-inline margin-inline-end margin-inline-start margin-left margin-right margin-top mask mask-border mask-border-mode mask-border-outset mask-border-repeat mask-border-slice mask-border-source mask-border-width mask-clip mask-composite mask-image mask-mode mask-origin mask-position mask-repeat mask-size mask-type max-block-size max-height max-inline-size max-lines max-width min-block-size min-height min-inline-size min-width mix-blend-mode object-fit object-position opacity orphans outline outline-color outline-style outline-width overflow overflow-wrap overflow-x overflow-y padding padding-bottom padding-left padding-right padding-top paint-order perspective perspective-origin place-content place-items place-self pointer-events position print-color-adjust quotes resize right rotate row-gap scale scroll-behavior scroll-margin scroll-margin-block scroll-margin-block-end scroll-margin-block-start scroll-margin-bottom scroll-margin-inline scroll-margin-inline-end scroll-margin-inline-start scroll-margin-left scroll-margin-right scroll-margin-top scroll-padding scroll-padding-block scroll-padding-block-end scroll-padding-block-start scroll-padding-bottom scroll-padding-inline scroll-padding-inline-end scroll-padding-inline-start scroll-padding-left scroll-padding-right scroll-padding-top scroll-snap-align scroll-snap-stop scroll-snap-type scrollbar-color scrollbar-width shape-image-threshold shape-margin shape-outside tab-size table-layout text-align text-align-last text-combine-upright text-decoration text-decoration-color text-decoration-line text-decoration-skip-ink text-decoration-style text-decoration-thickness text-emphasis text-emphasis-color text-emphasis-position text-emphasis-style text-indent text-justify text-orientation text-overflow text-shadow text-transform text-underline-offset text-underline-position top transform transform-box transform-origin transform-style transition transition-delay transition-duration transition-property transition-timing-function translate unicode-bidi vertical-align visibility white-space widows width word-break word-spacing word-wrap writing-mode z-index

Pseudo-Classes

active any-link blank checked default dir disabled empty enabled first-child first-of-type focus focus-within fullscreen hover in-range indeterminate invalid lang last-child last-of-type link local-link not nth-child nth-col nth-last-child nth-last-col nth-last-of-type nth-of-type only-child only-of-type optional out-of-range placeholder-shown read-only read-write required root scope target valid visited

Pseudo-Elements

after before first-letter first-line marker placeholder selection

Units

ch cm deg dpcm dpi dppx em ex grad in mm ms pc pt px Q rad rem s turn vh vmax vmin vw

JS

Overview

Overview

Declarations

const let var

Conditional Statements

if else else if switch try catch

Loops

do while for for in for of while

AbortController

abort AbortController signal

ChildNode

after before remove replaceWith

CustomEvent

CustomEvent detail

Event

bubbles cancelable composed composedPath currentTarget defaultPrevented Event eventPhase isTrusted preventDefault stopImmediatePropagation stopPropagation target timeStamp type

EventTarget

addEventListener dispatchEvent EventTarget removeEventListener

HTMLCollection

item length namedItem

NodeList

item length

NonDocumentTypeChildNode

nextElementSibling previousElementSibling

ParentNode

append children firstElementChild lastElementChild prepend querySelector querySelectorAll replaceChildren

Other

Array Comments Enable Functions alert confirm createContextualFragment Date getElementById getElementsByClassName getElementsByTagName getElementsByTagNameNS Infinity innerHTML insertAdjacentHTML outerHTML print prompt

PHP

Overview

Overview

Array

array array_change_key_case array_chunk array_column array_combine array_count_values array_diff array_diff_assoc array_diff_key array_diff_uassoc array_diff_ukey array_fill array_fill_keys array_filter array_flip array_intersect array_intersect_assoc array_intersect_key array_intersect_uassoc array_intersect_ukey array_key_exists array_key_first array_key_last array_keys array_map array_merge array_merge_recursive array_multisort array_pad array_pop array_product array_push array_rand array_reduce array_replace array_replace_recursive array_reverse array_search array_shift array_slice array_splice array_sum array_udiff array_udiff_assoc array_udiff_uassoc array_uintersect array_uintersect_assoc array_uintersect_uassoc array_unique array_unshift array_values array_walk array_walk_recursive arsort asort compact count current end extract in_array key key_exists krsort ksort list natcasesort natsort next pos prev range reset rsort shuffle sizeof sort uasort uksort usort

Calendar

cal_days_in_month cal_from_jd cal_info cal_to_jd easter_date easter_days frenchtojd gregoriantojd jddayofweek jdmonthname jdtofrench jdtogregorian jdtojewish jdtojulian jdtounix jewishtojd juliantojd unixtojd

Class / Object

class_alias class_exists get_called_class get_class_methods get_class get_class_vars get_declared_classes get_declared_interfaces get_declared_traits get_object_vars get_parent_class interface_exists is_a is_subclass_of method_exists property_exists trait_exists

CSPRNG

random_bytes random_int

Ctype

ctype_alnum ctype_alpha ctype_cntrl ctype_digit ctype_graph ctype_lower ctype_print ctype_punct ctype_space ctype_upper ctype_xdigit

cURL

curl_close curl_copy_handle curl_errno curl_error curl_escape curl_exec curl_file_create curl_getinfo curl_init curl_multi_add_handle curl_multi_close curl_multi_errno curl_multi_exec curl_multi_getcontent curl_multi_info_read curl_multi_init curl_multi_remove_handle curl_multi_select curl_multi_setopt curl_multi_strerror curl_pause curl_reset curl_setopt curl_setopt_array curl_share_close curl_share_errno curl_share_init curl_share_setopt curl_share_strerror curl_strerror curl_unescape curl_version

Date / Time

checkdate date date_add date_create date_create_from_format date_create_immutable date_create_immutable_from_format date_date_set date_default_timezone_get date_default_timezone_set date_diff date_format date_get_last_errors date_interval_create_from_date_string date_interval_format date_isodate_set date_modify date_offset_get date_parse date_parse_from_format date_sub date_sun_info date_sunrise date_sunset date_time_set date_timestamp_get date_timestamp_set date_timezone_get date_timezone_set getdate gettimeofday gmdate gmmktime gmstrftime idate localtime microtime mktime strftime strptime strtotime time timezone_abbreviations_list timezone_identifiers_list timezone_location_get timezone_name_from_abbr timezone_name_get timezone_offset_get timezone_open timezone_transitions_get timezone_version_get

Error Handling

debug_backtrace debug_print_backtrace error_clear_last error_get_last error_log error_reporting restore_error_handler restore_exception_handler set_error_handler set_exception_handler trigger_error user_error

Filesystem

basename chgrp chmod chown clearstatcache copy dirname disk_free_space disk_total_space diskfreespace fclose feof fflush fgetc fgetcsv fgets file file_exists file_get_contents file_put_contents fileatime filectime filegroup fileinode filemtime fileowner fileperms filesize filetype flock fnmatch fopen fpassthru fputcsv fputs fread fscanf fseek fstat ftell ftruncate fwrite glob is_dir is_executable is_file is_link is_readable is_uploaded_file is_writable is_writeable lchgrp lchown link linkinfo lstat mkdir move_uploaded_file pathinfo pclose popen readfile readlink realpath realpath_cache_get realpath_cache_size rename rewind rmdir set_file_buffer stat symlink tempnam tmpfile touch umask unlink

Filter

filter_has_var filter_id filter_input filter_input_array filter_list filter_var filter_var_array

Function Handling

call_user_func call_user_func_array forward_static_call forward_static_call_array func_get_arg func_get_args func_num_args function_exists get_defined_functions register_shutdown_function register_tick_function unregister_tick_function

Mail

mail

Math

abs acos acosh asin asinh atan atan2 atanh base_convert bindec ceil cos cosh decbin dechex decoct deg2rad exp expm1 floor fmod getrandmax hexdec hypot intdiv is_finite is_infinite is_nan lcg_value log log10 log1p max min mt_getrandmax mt_rand mt_srand octdec pi pow rad2deg rand round sin sinh sqrt srand tan tanh

Miscellaneous

__halt_compiler connection_aborted connection_status constant define defined die eval exit highlight_file highlight_string hrtime ignore_user_abort pack php_strip_whitespace show_source sleep sys_getloadavg time_nanosleep time_sleep_until uniqid unpack usleep

Network

checkdnsrr closelog dns_check_record dns_get_mx dns_get_record fsockopen gethostbyaddr gethostbyname gethostbynamel gethostname getmxrr getprotobyname getprotobynumber getservbyname getservbyport header header_register_callback header_remove headers_list headers_sent http_response_code inet_ntop inet_pton ip2long long2ip openlog pfsockopen setcookie setrawcookie socket_get_status socket_set_blocking socket_set_timeout syslog

PCRE

preg_filter preg_grep preg_last_error preg_match preg_match_all preg_quote preg_replace preg_replace_callback preg_replace_callback_array preg_split

Stream

stream_bucket_append stream_bucket_make_writeable stream_bucket_new stream_bucket_prepend stream_context_create stream_context_get_default stream_context_get_options stream_context_get_params stream_context_set_default stream_context_set_option stream_context_set_params stream_copy_to_stream stream_filter_append stream_filter_prepend stream_filter_register stream_filter_remove stream_get_contents stream_get_filters stream_get_line stream_get_meta_data stream_get_transports stream_get_wrappers stream_is_local stream_isatty stream_notification_callback stream_register_wrapper stream_resolve_include_path stream_select stream_set_blocking stream_set_chunk_size stream_set_read_buffer stream_set_timeout stream_set_write_buffer stream_socket_accept stream_socket_client stream_socket_enable_crypto stream_socket_get_name stream_socket_pair stream_socket_recvfrom stream_socket_sendto stream_socket_server stream_socket_shutdown stream_supports_lock stream_wrapper_register stream_wrapper_restore stream_wrapper_unregister

String

addcslashes addslashes bin2hex chop chr chunk_split convert_uudecode convert_uuencode count_chars crc32 crypt echo explode fprintf get_html_translation_table hebrev hebrevc hex2bin html_entity_decode htmlentities htmlspecialchars htmlspecialchars_decode implode join lcfirst levenshtein localeconv ltrim md5 md5_file metaphone nl_langinfo nl2br number_format ord parse_str print printf quoted_printable_decode quoted_printable_encode quotemeta rtrim setlocale sha1 sha1_file similar_text soundex sprintf sscanf str_contains str_ends_with str_getcsv str_ireplace str_pad str_repeat str_replace str_rot13 str_shuffle str_split str_starts_with str_word_count strcasecmp strchr strcmp strcoll strcspn strip_tags stripcslashes stripos stripslashes stristr strlen strnatcasecmp strnatcmp strncasecmp strncmp strpbrk strpos strrchr strrev strripos strrpos strspn strstr strtok strtolower strtoupper strtr substr substr_compare substr_count substr_replace trim ucfirst ucwords vfprintf vprintf vsprintf wordwrap

Tokenizer

token_get_all token_name

URL

base64_decode base64_encode get_headers get_meta_tags http_build_query parse_url rawurldecode rawurlencode urldecode urlencode

Variable Handling

boolval debug_zval_dump doubleval empty floatval get_defined_vars get_resource_id get_resource_type gettype intval is_array is_bool is_callable is_countable is_double is_float is_int is_integer is_iterable is_long is_null is_numeric is_object is_real is_resource is_scalar is_string isset print_r serialize settype strval unserialize unset var_dump var_export

SVG

Overview

Overview

Attributes

accumulate additive amplitude attributeName azimuth baseFrequency begin bias by calcMode clipPathUnits crossorigin cx cy d diffuseConstant divisor download dur dx dy edgeMode elevation end exponent fill filterUnits flood-color flood-opacity fr from fx fy gradientTransform gradientUnits height href hreflang id in in2 intercept k1 k2 k3 k4 kernelMatrix keyPoints keySplines keyTimes lengthAdjust limitingConeAngle markerHeight markerUnits markerWidth maskContentUnits maskUnits max media method min mode no-composite numOctaves offset onbegin onend onrepeat operator order orient origin path pathLength patternContentUnits patternTransform patternUnits ping points pointsAtX pointsAtY pointsAtZ preserveAlpha preserveAspectRatio primitiveUnits r radius referrerPolicy refx refy rel repeatCount repeatDur requiredExtensions restart rotate rx ry scale seed side slope spacing specularConstant specularExponent spreadMethod startoffset stdDeviation stitchTiles stop-color stop-opacity surfaceScale systemLanguage tableValues target targetX targetY textLength title to transform type values viewBox width x x1 x2 xChannelSelector y y1 y2 yChannelSelector z zoomAndPan

Elements

a animate animateMotion animateTransform circle clipPath defs desc discard ellipse feBlend feColorMatrix feComponentTransfer feComposite feConvolveMatrix feDiffuseLighting feDisplacementMap feDistantLight feDropShadow feFlood feFuncA feFuncB feFuncG feFuncR feGaussianBlur feImage feMerge feMergeNode feMorphology feOffset fePointLight feSpecularLighting feSpotLight feTile feTurbulence filter foreignObject g image line linearGradient marker mask metadata mpath path pattern polygon polyline radialGradient rect script set stop style svg switch symbol text textPath title tspan unknown use view

Values

_blank _parent _self _top A align alpha-value always angle anonymous arithmetic atop auto auto-start-reverse auto-reverse B BackgroundAlpha BackgroundImage begin-value-list blend-mode bottom center clock-value color control-point currentColor default dilate disable discrete duplicate empty-string end-value-list erode exact false FillPaint filter-primitive-reference fractalNoise freeze G gamma height hueRotate icccolor id identity in indefinite integer left length length-percentage lighter linear list list-of-numbers luminanceToAlpha magnify matrix media meetOrSlice min-x min-y name never no-composite no-referrer no-referrer-when-downgrade none noStitch number number-optional-number objectBoundingBox origin origin-when-cross-origin out over paced pad path-data percentage points R reflect remove repeat replace right rotate same-origin saturate scale script set-of-comma-separated-tokens set-of-space-separated-tokens skewx skewy SourceAlpha SourceGraphic spacing spacingAndGlyphs spline stitch stretch strict-origin strict-origin-when-cross-origin string StrokePaint strokeWidth sum table tokens top transform-list translate true turbulence unsafe-url url use-credentials userSpaceOnUse value whenNotActive width wrap XML-Name xor

MORE

.htaccess

acme.sh

Bible

Bible Passages Bible Pictures Jesus Loves the Little Children Merry Christmas One Man. One Woman. One Lifetime. The Armor of God

Cards

Euchre Sevens Solitaire

LEGO

LEGO Cannonball Bingo LEGO Pandamonium LEGO Pirate Plunder LEGO The Machine

Other

Miniature Golf Space Station

Editor

Favicon

Flash

Detect

Embed Load

AS3Dmod

Modifiers

Bend Bloat Cloth Noise Perlin Pivot Skew Taper Twist

Other

Flag

FLARToolKit

JigLibFlash

Objects

JBox JCapsule JPlane JSphere

Other

Physics

Install

Install

Example

1 2 3 4 5

Cameras

Camera3D DebugCamera3D SpringCamera3D

Core

Lines3D FogFilter

Light

PointLight3D

Materials

BitmapFileMaterial BitmapMaterial BitmapViewportMaterial ColorMaterial CompositeMaterial MovieMaterial WireframeMaterial

Shade Materials

CellMaterial EnvMapMaterial FlatShadeMaterial GouraudMaterial PhongMaterial

Special Material

ParticleMaterial

Parser Objects

DAE KMZ

Primitive Objects

Arrow Cone Cube Cylinder PaperPlane Plane Sphere

Special Objects

ParticleField UCS

Render

BasicRenderEngine LazyRenderEngine QuadrantRenderEngine

Scene

Scene3D

Typography

Text3D

Views

BasicView ReflectionView StatsView Viewport3D

View Layers

BitmapEffectLayer ViewportLayer

Other

Anaglyph Camera Move Camera Rotate Camera Target Move Object Move Object Rotate Object Scale Panorama

SketchUp

Papervision3D Triangulate

Unity

Detect

Detect

Games

Air Hockey Foosball Pool

Unity

Car Lerpz Escapes Mecanim

Xcode

Example

1 2 3 4 5 6

CSV2Plist

CSV2Plist

UI

UIActivityIndicatorView UIButton UIImageView UILabel UIPageControl UIProgressView UISegmentedControl UISlider UIStepper UISwitch UITextField

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