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HTML-comms-ja.html
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<!DOCTYPE html><html lang="ja"><head><meta charset="utf-8">
<title>HTML Standard — Communication（日本語訳）</title>
<link rel="stylesheet" href="common.css" type="text/css">
<link rel="stylesheet" href="common-whatwg.css" type="text/css">
<script src="common0.js"></script>
<script src="common1.js" async></script>
<script>
Util.ready = function(){
const source_data = {
toc_main: 'comms',
generate: expand
};
Util.switchWordsInit(source_data);
}
function expand(){
const class_map = this.class_map;
const tag_map = this.tag_map;
const link_map = this.link_map;
let context = '';
return this.html.replace(
/%[\w\-~一-鿆あ-ん]+|``?(.+?)([$@\^])(\w*)/g,
create_html
);
function create_html(match, key, indicator, klass){
if(!key) {//%
return `<var>${match.slice(1)}</var>`;
}
let href = '';
let href1 = '';
{
const n = key.indexOf('＠');
if(n > 0) {
href1 = key.slice(n + 1);
key = key.slice(0, n);
}
}
let text = key;
switch(klass){
case 'r':
text = `[${key}]`;
href = `HTML-references.html#refs${key}`;
break;
case 'l':
text = `"<code class="literal">${text}</code>"`;
break;
case 'sl':
text = `[[${key}]]`;
break;
case 'P': // production
href = `#_p.${key}`;
break;
case 'CTX': // set link context for "``"
context = key;
return '';
break;
case 'mc':
text = 'constructor';
href = `#dom-${key.toLowerCase()}`;
break;
case 'm':
const n = text.indexOf('(');
if(n > 0){
key = text.slice(0, n);
text = key + text.slice(n).replace(/\w+/g, '<var>$&</var>');
}
break;
case '0x': // escape '%'
return `%x${key}`;
break;
case 'U':
text = `U+${key}`;
break;
case 'en':
return `<span lang="en">${key}</span>`;
break;
}
let tag = tag_map[klass];
if(tag) {
let classname = class_map[klass];
classname = classname ? ` class="${classname}"` : '';
text = `<${tag}${classname}>${text}</${tag}>`;
}
if(match[1] === '`') {
klass = `${klass}!${context}`;
}
if(indicator !== '^'){
href = href1 || link_map[ klass ? `${klass}.${key}` : key ] || href;
if(!href){
console.log(match); // check error
return match;
}
switch(indicator){
case '$':
text = `<a href="${href}">${text}</a>`;
break;
case '@':
text = `<dfn id="${href.slice(1)}">${text}</dfn>`;
break;
}
}
return text;
}
}
</script>
<script type="text/plain" id="_source_data">
●●options
spec_date:2024-11-21
trans_update:2024-11-22
source_checked:240112
page_state_key:HTML
spec_status:LS
original_url:https://html.spec.whatwg.org/multipage/comms.html
abbr_url:HTMLcomms
site_nav:comms,network,html
nav_prev:HTMLnavigator
nav_next:HTMLsse
trans_1st_pub:2016-12-06
●●original_urls
the-messageevent-interface:https://html.spec.whatwg.org/multipage/comms.html
server-sent-events:https://html.spec.whatwg.org/multipage/server-sent-events.html
network:https://html.spec.whatwg.org/multipage/web-sockets.html
web-messaging:https://html.spec.whatwg.org/multipage/web-messaging.html
channel-messaging:https://html.spec.whatwg.org/multipage/web-messaging.html
broadcasting-to-other-browsing-contexts:https://html.spec.whatwg.org/multipage/web-messaging.html
●●class_map
e:element
a:attr
E:error
P:production
et:event-type
st:attr-state
sl:js-slot
jt:js-type
jA:abstract
v:value
U:code-point
●●tag_map
I:code
m:code
mb:code
E:code
c:code
e:code
a:code
et:code
st:i
sl:span
jA:span
jt:code
P:code
v:code
t:var
i:i
U:span
sub:sub
cite:cite
●●words_table1
postMessageO:postMessage
●●words_table
●network / messaging
address-book:address book::address 帳:アドレス帳
email::::メール
連絡先:contact::~
social::::ソーシャル
server-sent::::サーバ送信
hostname::::ホスト名
rate::::レート
rate-limiting
投函-:post::~::ポスト
投函~法:posting
投函-済み:posted
broadcast::::ブロードキャスト
文書間:cross-document::~
close:
~close済み:closed
~close中:closing
pipe::::パイプ
source設定群:sourceSettings
受信器:receiver::~
返信-:send back::~
切断-:disconnect::~
連絡-:entangle::~
連絡:entangle::~
連絡を断つ:disentangle
添付-:attach:~
実体:entity:~
宛先:target::~
~message法:messaging
●保安
DoS:denial-of-service:DoS
XSS:cross-site scripting:XSS
log-in:log in:::ログイン
log-out:log out:::ログアウト
~obj能力:object-capability
悪用-:exploit::~
機密的:confidential:~
濫用-:abuse:~
特権:privilege::~
信用-済み:trusted
欠陥:flaw::~
動作者:actor::~
提供-:provide::~
提供者:provider::~
消費者:consumer::~
増殖-:multiply:~
●IDL／型／構造
出自に:originate:~
property::::プロパティ
options:options
●環境
agent:
現任:incumbent:~
●処理
locking::::ロック処理
clone~record:cloneRecord
収集し直-:recollect
cross-process::::プロセス間
搬送-:ship::~
搬送-済み:shipped
未搬送:unshipped::~
公告-:announce::~
保持体:holder::~::ホルダ
静止-:pause::~
回送-:forward::~
弱い:weakな:~
同時に:simultaneous
保たれ:keepされ:~
例外投出あり:rethrow any exceptions::~
即座:prompt::~
破棄予定:doomed:~
代理-:proxy::~
処理待ち:pending:~
時間:time
短い:short
二重化された:two-ways
生きた:liveな
生き続け:continue to live
毎分:per minute
一時に跳ね上がり得る:lead to high transient
●構文／stream
LF:
CR:
COLON
space
BOM
直列形:serialized::~::シリアル形
逆直列化-:deserialize::~::逆シリアル化
●仕様
対称:symmetric:~
注意-:care:~
格別に注意する:extra care
高価:expensive:~
難点:difficulties:~
解決策:solution:~
基礎:basis:~
簡易的:naïve:~
black-box::::ブラックボックス
仮想の:virtual:~
協調:coordination:~
切替えれ:switchでき:切り替えれ
発展:evolution:~
計算:computation:~
勧める:adviseする:~
利用量:usage:~
適格:eligible:~
実用的でなくなる:impractical
大げさになる:unreasonable overhead
見込みが高い:likely
任意選択:may／optional
不要:no longer needed
-:criteria
~~主な違い:key difference
-:further
渡-:pass
似た命名の:similarly-named
できないこと:inability
逆も同様:vice-versa
当の:in question
手の込んだ:elaborate
目に見える:apparent
optionally
無論:of course
ばかりの:just been
こっち:over here
そっち:your
委ねる:opening up
確かめる:make sure
引き継いで:continuing
することもあり得る:possibility of 〜 trying to
まったく:in the slightest
単に:merely
何か:anything
これら二者:together
特に:most particularly
自らに利する:on its behalf
要は:key
消し去:go away
判別-不能:indistinguishable
利用-不能:no 〜 usable
影響しな:unaffected
抽象-化:abstracting out
放置-:forgot
至り／-:lead
〜とする:suppose
伝え:tell
●未分類
開かれ:openされ:~
clear:
game::::ゲーム
:time
捉える:viewed as a
wildcard::::ワイルドカード
個人名:person:~
側:side:~
~~大容量:hight volume
~~利己:own
方法
注記
始-:begin
対応:corresponding
-:back
入って来る:incoming
どこかで:on the floor
片:piece
後で:later
相手~側~port:twin
note
-:causing
respective
instantaneous
leaving
starting
first-class
渡すこと:passing
amount
long
sometime
altogether
part
came
同順の:maintaining their relative order
-:outer
同等:equal
%新~port~list:newPorts
%宛先~生成元:targetOrigin
%宛先~port:targetPort
%起動元~port:initiatorPort
%相手~port:otherPort
%宛先~window:targetWindow
%宛先~realm:targetRealm
%直列形:serialized
%最終-宛先~port:finalTargetPort
%逆直列化-~record:deserializeRecord
%構文解析した~URL:parsedURL
%~message~clone:messageClone
%~message~event~target:messageEventTarget
%破棄予定か:doomed
%~source~port:sourcePort
%transfer:transfer
%~source~storage~key:~sourceStorageKey
●指示語
最終-:final:~
旧いものから順:oldest first
もはや／それ以降:no longer
-:whereby
-:identical
two
同じ:single
:earlier
次:next
nothing
now
前回:the previous
一方
他方
片方
一連
両端:each end
今度:now
以下
以外
以降
個
初回
前節
各種
唯一
対応
次第
段階
時点
部位
別:alternate
●●original_id_map
for WebSocket
network:network-intro
network:the-websocket-interface
network:feedback-from-the-protocol
network:ping-and-pong-frames
network:the-closeevent-interface
network:garbage-collection-2
network:websocket
network:binarytype
network:closeevent
network:closeeventinit
●●mdn_urls
broadcastchannel:API/BroadcastChannel
messagechannel:API/MessageChannel
messageevent:API/MessageEvent
messageeventinit:API/MessageEventInit
messageeventsource:API/MessageEventSource
messageport:API/MessagePort
postmessageoptions:API/StructuredSerializeOptions
●●link_map
●IDL
Transferable:~HTMLcloning#transferable
E.DataCloneError:~WEBIDL#datacloneerror
E.InvalidStateError:~WEBIDL#invalidstateerror
E.SyntaxError:~WEBIDL#syntaxerror
object:~WEBIDL#idl-object
I.BroadcastChannel:#broadcastchannel
I.DOMException:~WEBIDL#idl-DOMException
I.ArrayBuffer:~WEBIDL#idl-ArrayBuffer
I.Blob:~FILEAPI#blob
I.Document:~HTMLdom#document
文書:~HTMLdom#the-document-object
I.Event:~DOM4#interface-event
I.EventHandler:~WAPI#eventhandler
I.EventInit:~DOM4#dictdef-eventinit
I.EventSource:~HTMLsse#eventsource
I.EventTarget:~DOM4#interface-eventtarget
I.File:~FILEAPI#file
I.FileList:~FILEAPI#filelist-section
I.MessageChannel:#messagechannel
I.MessageEvent:#messageevent
I.MessageEventInit:#messageeventinit
I.MessageEventSource:#messageeventsource
I.MessageEventTarget:#messageeventtarget
I.MessagePort:#messageport
I.StructuredSerializeOptions:#structuredserializeoptions
I.ServiceWorker:~SW1#serviceworker
I.SharedWorkerGlobalScope:~WORKERS#sharedworkerglobalscope
I.WebSocket:~WEBSOCKET#websocket
I.Window:~WINDOW#window
~window:~WINDOW#the-window-object
I.WindowProxy:~HTMLWPROXY#windowproxy
I.WorkerGlobalScope:~WORKERS#workerglobalscope
I.XMLHttpRequest:~XHR#xmlhttprequest
jt.Date:~TC39#sec-date-objects
constructor:~DOM4#concept-event-constructor
9.1
m.initMessageEvent:#dom-messageevent-initmessageevent
m.lastEventId:#dom-messageevent-lasteventid
m.origin:#dom-messageevent-origin
m.ports:#dom-messageevent-ports
m.source:#dom-messageevent-source
m.data:#dom-messageevent-data
mb.data:#dom-messageeventinit-data
mb.origin:#dom-messageeventinit-origin
mb.lastEventId:#dom-messageeventinit-lasteventid
mb.source:#dom-messageeventinit-source
mb.ports:#dom-messageeventinit-ports
9.4.3
m.onmessage:#handler-messageeventtarget-onmessage
m.onmessageerror:#handler-messageeventtarget-onmessageerror
9.5
m!MessagePort.close:#dom-messageport-close
m!MessagePort.postMessage:#dom-messageport-postmessage
m!MessagePort.~postMessageO:#dom-messageport-postmessage-options
m!MessagePort.start:#dom-messageport-start
m!MessagePort.onclose:#handler-messageport-onclose
9.6
m.new BroadcastChannel:#dom-broadcastchannel
m!BroadcastChannel.constructor:#dom-broadcastchannel
m!BroadcastChannel.postMessage:#dom-broadcastchannel-postmessage
m!BroadcastChannel.name:#dom-broadcastchannel-name
m!BroadcastChannel.close:#dom-broadcastchannel-close
m!BroadcastChannel.onmessage:#handler-broadcastchannel-onmessage
m!BroadcastChannel.onmessageerror:#handler-broadcastchannel-onmessageerror
9.5.2
m.constructor:#dom-messagechannel
m.new MessageChannel:#dom-messagechannel
m.port1:#dom-messagechannel-port1
m.port2:#dom-messagechannel-port2
m.postMessage:#dom-window-postmessage
m.~postMessageO:#dom-window-postmessage-options
m.window.postMessage:#dom-window-postmessage
m.transfer:#dom-structuredserializeoptions-transfer
m.targetOrigin:~WINDOW#dom-windowpostmessageoptions-targetorigin
m.addEventListener:~DOM4#dom-eventtarget-addeventlistener
m.initEvent:~DOM4#dom-event-initevent
e.iframe:~HEembed#the-iframe-element
et.close:~HTMLindex#event-close
et.connect:~HTMLindex#event-workerglobalscope-connect
et.hashchange:~HTMLindex#event-hashchange
et.message:~HTMLindex#event-message
et.messageerror:~HTMLindex#event-messageerror
et.resize:~CSSOMVIEW#eventdef-window-resize
sl.Detached:~HTMLcloning#detached
●用語
~channel名:#channel-name
~closeされたか:#concept-broadcastchannel-closed
eS.最後の~event~ID文字列:~HTMLsse#concept-event-stream-last-event-id
~message~event~target:#message-event-target
~port~message~queue:#port-message-queue
未搬送な~port~message~queue:#unshipped-port-message-queue
投函-済み~message~task~source:#posted-message-task-source
搬送-済みか:#has-been-shipped
~port 1:#port-1
~port 2:#port-2
~portを連絡する:#entangle
~portの連絡を断つ:#disentangle
~windowに~messageを投函する手続き:#window-post-message-steps
~message~portに~messageを投函する手続き:#message-port-post-message-steps
~message法に適格:#eligible-for-messaging
§
:#event-stream-interpretation
~server-sent~event:~HTMLsse#server-sent-events
~broadcast~channel:#broadcasting-to-other-browsing-contexts
~channel~message法:#channel-messaging
文書間~message法:#web-messaging
●用語（HTML
jA.StructuredSerialize:~HTMLcloning#structuredserialize
jA.StructuredDeserialize:~HTMLcloning#structureddeserialize
jA.StructuredSerializeWithTransfer:~HTMLcloning#structuredserializewithtransfer
jA.StructuredDeserializeWithTransfer:~HTMLcloning#structureddeserializewithtransfer
転送-可能:~HTMLcloning#transferable-objects
転送-手続き:~HTMLcloning#transfer-steps
転送-受信-時の手続き:~HTMLcloning#transfer-receiving-steps
設定群~obj:~WAPI#settings-object
関連な~realm:~WAPI#concept-relevant-realm
関連な~agent:~WAPI#relevant-agent
関連な設定群~obj:~WAPI#relevant-settings-object
関連な大域~obj:~WAPI#concept-relevant-global
gL.~realm:~WAPI#concept-global-object-realm
現任な設定群~obj:~WAPI#incumbent-settings-object
enV.大域~obj:~WAPI#concept-settings-object-global
enV.生成元:~WAPI#concept-settings-object-origin
~event~loop:~WAPI#event-loop
aG.~event~loop:#concept-agent-event-loop
~event~handler:~WAPI#event-handlers
~event~handler~IDL属性:~WAPI#event-handler-idl-attributes
~event~handler~event型:~WAPI#event-handler-event-type
~task:~WAPI#concept-task
大域~taskを~queueする:~WAPI#queue-a-global-task
~task~queue:~WAPI#task-queue
~task~source:~WAPI#task-source
tK.文書:~WAPI#concept-task-document
~DOM操作~task~source:~WAPI#dom-manipulation-task-source
全部的に作動中:~HTMLds#fully-active
閲覧~文脈:~HTMLds#browsing-context
結付けられた文書:~WINDOW#concept-document-window
対応する閲覧~文脈:~WINDOW#window-bc
同一-生成元:~ORIGIN#same-origin
sub.生成元:~ORIGIN#same-origin
生成元:~ORIGIN#concept-origin
生成元を直列化する:~ORIGIN#ascii-serialisation-of-an-origin
~navigate:~HTMLnav#navigate
wG.~close中か:~WORKERS#dom-workerglobalscope-closing
休止-可能:~WORKERS#suspendable-worker
~worker:~WORKERS#worker
共用~worker:~WORKERS#sharedworker
共用~worker内:~WORKERS#sharedworkerglobalscope
●用語（外部
実装定義:~INFRA#implementation-defined
追跡~行路:~INFRA#tracking-vector
doc.生成元:~DOM4#concept-document-origin
凍結d配列:~WEBIDL#dfn-frozen-array-type
新たな:~WEBIDLjs#new
~eventを発火する:~DOM4#concept-event-fire
url.生成元:~URL1#concept-url-origin
url.素片:~URL1#concept-url-fragment
~URL:~URL1#concept-url
~URL~record:~URL1#concept-url
~URL構文解析する:~URL1#concept-url-parser
非~storage目的~用に~storage~keyを得する:~STORAGE#obtain-a-storage-key-for-non-storage-purposes
同等な~storage~key:~STORAGE#storage-key-equal
●●trans_metadata
<p>
~THIS_PAGEは、~WHATWGによる HTML 仕様の § Communication 内の
<a href="~HTMLLS/comms.html#the-messageevent-interface">§ The MessageEvent interfaces</a>,
<a href="~HTMLLS/web-messaging.html#web-messaging">§ Cross-document messaging</a>,
<a href="~HTMLLS/web-messaging.html#channel-messaging">§ Channel messaging</a>,
<a href="~HTMLLS/web-messaging.html#broadcasting-to-other-browsing-contexts">§ Broadcasting to other browsing contexts</a>
を日本語に翻訳したものです
~PUB
</p>
</script>
</head>
<body>
<header>
<hgroup>
<h1>HTML — 通信</h1>
</hgroup>
</header>
<main id="MAIN" hidden>
<section id="comms">
<h2 title="Communication">9. 通信</h2>
<p id="network" class="note">注記：
この節に定義されていた `WebSocket$I ~interfaceは、
今や， `WebSockets^cite `WEBSOCKETS$r にて定義される。
◎
The WebSocket interface used to be defined here. It is now defined in WebSockets. [WEBSOCKETS]
</p>
<section id="_conventions">
<h3>【この訳に特有な表記規約】</h3>
◎表記記号
</section>
<section id="the-messageevent-interface">
<h3 title="The MessageEvent interfaces">9.1. `MessageEvent^I ~interface</h3>
<p>
次に挙げるものにおいては、
各 `message$et ~eventは， `MessageEvent$I ~interfaceを利用する
⇒＃
`~server-sent~event$における~message／
`文書間~message法$／
`~channel~message法$／
`~broadcast~channel$／
`WebSockets^cite `WEBSOCKETS$r
◎
Messages in server-sent events, cross-document messaging, channel messaging, broadcast channels, and WebSockets use the MessageEvent interface for their message events: [WEBSOCKETS]
</p>
<pre class="idl">
[Exposed=(Window,Worker,AudioWorklet)]
interface `MessageEvent@I : `Event$I {
`constructor$(DOMString %type, optional `MessageEventInit$I %eventInitDict = {});
readonly attribute any `data$m;
readonly attribute USVString `origin$m;
readonly attribute DOMString `lastEventId$m;
readonly attribute `MessageEventSource$I? `source$m;
readonly attribute FrozenArray<`MessagePort$I> `ports$m;
undefined `initMessageEvent$m(DOMString %type, optional boolean %bubbles = false, optional boolean %cancelable = false, optional any %data = null, optional USVString %origin = "", optional DOMString %lastEventId = "", optional `MessageEventSource$I? %source = null, optional sequence<`MessagePort$I> %ports = []);
};
dictionary `MessageEventInit@I : `EventInit$I {
any `data@mb = null;
USVString `origin@mb = "";
DOMString `lastEventId@mb = "";
`MessageEventSource$I? `source@mb = null;
sequence<`MessagePort$I> `ports@mb = [];
};
typedef (`WindowProxy$I or `MessagePort$I or `ServiceWorker$I) `MessageEventSource@I;
</pre>
<dl class="domintro">
<dt>%event.`data$m</dt>
<dd>
~messageの~dataを返す。
◎
Returns the data of the message.
</dd>
<dt>%event.`origin$m</dt>
<dd>
［
`~server-sent~event$／`文書間~message法$
］の下では、
~messageの生成元を返す。
◎
Returns the origin of the message, for server-sent events and cross-document messaging.
</dd>
<dt>%event.`lastEventId$m</dt>
<dd>
`~server-sent~event$の下では、
`最後の~event~ID文字列$eSを返す。
◎
Returns the last event ID string, for server-sent events.
</dd>
<dt>%event.`source$m</dt>
<dd>
`文書間~message法$の下では、
~source~window
【送信-元~window】
の `WindowProxy$I を返す。
`SharedWorkerGlobalScope$I ~objに向けて発火された `connect$et ~eventにおいては、
添付されている `MessagePort$Iを返す。
◎
Returns the WindowProxy of the source window, for cross-document messaging, and the MessagePort being attached, in the connect event fired at SharedWorkerGlobalScope objects.
</dd>
<dt>%event.`ports$m</dt>
<dd>
［
`文書間~message法$／`~channel~message法$
］の下では、
~messageに伴われて送信された `MessagePort$I 配列を返す。
◎
Returns the MessagePort array sent with the message, for cross-document messaging and channel messaging.
</dd>
</dl>
<div class="algo">
<p>
`data@m
取得子~手続きは、
初期化-時の値を返す。
◎
The data attribute must return the value it was initialized to.＼
</p>
<p>
結果は、
送信されてきた~messageを表現する。
◎
It represents the message being sent.
</p>
</div>
<div class="algo">
<p>
`origin@m
取得子~手続きは、
初期化-時の値を返す。
◎
The origin attribute must return the value it was initialized to.＼
</p>
<p>
これは，［
`~server-sent~event$／`文書間~message法$
］の下では、［
~messageを送信した文書の`生成元$doc
］を表現する
（概して，当の文書の［
~scheme, ~hostname, ~port
］からなるが、
その［
~pathや`素片$url
］は含まない）。
◎
It represents, in server-sent events and cross-document messaging, the origin of the document that sent the message (typically the scheme, hostname, and port of the document, but not its path or fragment).
</p>
</div>
<div class="algo">
<p>
`lastEventId@m
取得子~手続きは、
初期化-時の値を返す。
◎
The lastEventId attribute must return the value it was initialized to.＼
</p>
<p>
これは，`~server-sent~event$の下では、［
`EventSource$I ~objの`最後の~event~ID文字列$eS
］を表現する。
◎
It represents, in server-sent events, the last event ID string of the event source.
</p>
</div>
<div class="algo">
<p>
`source@m
取得子~手続きは、
初期化-時の値を返す。
◎
The source attribute must return the value it was initialized to.＼
</p>
<p>
これは，
`文書間~message法$の下では、［
~messageを送ってきた`~window$に`対応する閲覧~文脈$の `WindowProxy$I
］を表現する。
`共用~worker内$で利用される `connect$et ~eventにおいては、
新たに接続している `MessagePort$I になる。
◎
It represents, in cross-document messaging, the WindowProxy of the browsing context of the Window object from which the message came; and in the connect events used by shared workers, the newly connecting MessagePort.
</p>
</div>
<div class="algo">
<p>
`ports@m
取得子~手続きは、
初期化-時の値を返す。
◎
The ports attribute must return the value it was initialized to.＼
</p>
<p>
これは，［
`文書間~message法$／`~channel~message法$
］の下では、［
~messageに伴って送信される `MessagePort$I 配列
］を表現する。
◎
It represents, in cross-document messaging and channel messaging, the MessagePort array being sent.
</p>
</div>
<div class="algo">
<p>
`initMessageEvent(type, bubbles, cancelable, data, origin, lastEventId, source, ports)@m
~method~手続きは、［
似た命名の `initEvent()$m ~methodに相似的な方式
］で~eventを初期化する。
`DOM$r
【構築子と機能が重複する旧来の~method】
◎
The initMessageEvent(type, bubbles, cancelable, data, origin, lastEventId, source, ports) method must initialize the event in a manner analogous to the similarly-named initEvent() method. [DOM]
</p>
<p class="note">注記：
様々な~API（例： `WebSocket$I や `EventSource$I ）が、
`MessagePort$I ~APIを利用せずに，
`MessageEvent$I ~interfaceを `message$et ~eventに利用する。
◎
Various APIs (e.g., WebSocket, EventSource) use the MessageEvent interface for their message event without using the MessagePort API.
</p>
</div>
</section>
<section id="server-sent-events">
<h3 title="Server-sent events">9.2. ~server-sent~event</h3>
<p class="trans-note">【
この節の内容の和訳は、
`別~page＠~HTMLsse$にて。
】</p>
</section>
<section id="web-messaging">
<h3 title="Cross-document messaging">9.3. 文書間~message法</h3>
<a id="crossDocumentMessages"></a>
<p>
~securityや~privacyの理由から、
~web~browserは［
異なる~domainに属する文書どうしが互いに影響しあう
］のを防止する
— すなわち、
~XSSは許容されないようにする。
◎
Web browsers, for security and privacy reasons, prevent documents in different domains from affecting each other; that is, cross-site scripting is disallowed.
</p>
<p>
これは重要な~security用の特能であるが、
異なる~domainに属する~pageとの通信は，
その~pageが敵対的でなくとも防止される。
この節では、［
~source~domainに関わらず，
文書どうしが互いに~messageを通信しあえる
］ようにする~systemを［
~XSS攻撃を可能化しないように設計される仕方
］で導入する。
◎
While this is an important security feature, it prevents pages from different domains from communicating even when those pages are not hostile. This section introduces a messaging system that allows documents to communicate with each other regardless of their source domain, in a way designed to not enable cross-site scripting attacks.
</p>
<p class="note" id="fingerprint-postMessage">
注記：
`postMessage()$m ~APIは、
`追跡~行路$として利用され得る。
◎
The postMessage() API can be used as a tracking vector.
</p>
<section id="introduction-12">
<h4 title="Introduction">9.3.1. 序論</h4>
◎非規範的
<div class="example">
<p>
例えば，ある文書 %A が
`iframe$e 要素を包含していて,
その要素は 別の文書 %B を包含している下で，
%A 内の~scriptが %B の`~window$の
`window.postMessage()$m を~callした場合、
~message~eventは，その~objに向けて発火される
— %A の`~window$を出自にしているよう~markされた上で。
%A 内の~scriptは、
次の様になろう：
◎
For example, if document A contains an iframe element that contains document B, and script in document A calls postMessage() on the Window object of document B, then a message event will be fired on that object, marked as originating from the Window of document A. The script in document A might look like:
</p>
<pre class="lang-js">
var %o = document.getElementsByTagName('iframe')[0];