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author | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
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committer | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
commit | 33058f2b292b3a581333bdfb21b8f671898c5060 (patch) | |
tree | 51c3e392513ec574331b2d3f85c394445ea803c6 /files/ja/web/api/navigator/devicememory | |
parent | 8b66d724f7caf0157093fb09cfec8fbd0c6ad50a (diff) | |
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-rw-r--r-- | files/ja/web/api/navigator/devicememory/index.html | 62 |
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diff --git a/files/ja/web/api/navigator/devicememory/index.html b/files/ja/web/api/navigator/devicememory/index.html new file mode 100644 index 0000000000..8a307e45f6 --- /dev/null +++ b/files/ja/web/api/navigator/devicememory/index.html @@ -0,0 +1,62 @@ +--- +title: Navigator.deviceMemory +slug: Web/API/Navigator/deviceMemory +tags: + - API + - Device Memory API + - Navigator + - Property + - Reference + - deviceMemory + - memory +translation_of: Web/API/Navigator/deviceMemory +--- +<div>{{APIRef("Device Memory")}}{{securecontext_header}}{{SeeCompatTable}}</div> + +<p><span class="seoSummary"><strong><code>deviceMemory</code></strong> は {{domxref("Navigator")}} インターフェイスの読み取り専用プロパティで、端末のおよそのメモリ量をギガバイト単位で返します。</span>この値は概数で、最も近い2の指数に切り下げ、1024で割った数字になります。また、とても低性能または高性能の端末を使用している人のプライバシーを守るため、上限値と下限値が使用されます。</p> + +<h2 id="Syntax" name="Syntax">構文</h2> + +<pre class="syntaxbox"><em>memoryAmount</em> = navigator.deviceMemory</pre> + +<h3 id="Value" name="Value">値</h3> + +<p>浮動小数点値で <code>0.25</code>, <code>0.5</code>, <code>1</code>, <code>2</code>, <code>4</code>, <code>8</code> のうちのいずれかです。</p> + +<h2 id="Example" name="Example">例</h2> + +<pre class="brush: js">const memory = navigator.deviceMemory +console.log (`This device has at least ${memory}GiB of RAM.`) +</pre> + +<h2 id="Specifications" name="Specifications">仕様書</h2> + +<table class="standard-table"> + <thead> + <tr> + <th scope="col">仕様書</th> + <th scope="col">状態</th> + <th scope="col">備考</th> + </tr> + </thead> + <tbody> + <tr> + <td>{{SpecName("Device Memory","#sec-device-memory-js-api","deviceMemory")}}</td> + <td>{{Spec2("Device Memory")}}</td> + <td>初回定義</td> + </tr> + </tbody> +</table> + +<h2 id="Browser_compatibility" name="Browser_compatibility">ブラウザーの互換性</h2> + +<div class="hidden">このページの互換性一覧表は構造化データから生成されています。データに協力していただけるのであれば、 <a class="external" href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> をチェックアウトしてプルリクエストを送信してください。</div> + +<p>{{Compat("api.Navigator.deviceMemory")}}</p> + +<h2 id="See_also" name="See_also">関連情報</h2> + +<ul> + <li><a href="/ja/docs/Web/API/Device_Memory_API">Device Memory API</a></li> + <li>{{HTTPHeader("Device-Memory")}} HTTP header</li> +</ul> |