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Diffstat (limited to 'files/ja/web/javascript/reference/operators/left_shift_assignment')
| -rw-r--r-- | files/ja/web/javascript/reference/operators/left_shift_assignment/index.md | 49 |
1 files changed, 18 insertions, 31 deletions
diff --git a/files/ja/web/javascript/reference/operators/left_shift_assignment/index.md b/files/ja/web/javascript/reference/operators/left_shift_assignment/index.md index b57a508e84..66f59bc046 100644 --- a/files/ja/web/javascript/reference/operators/left_shift_assignment/index.md +++ b/files/ja/web/javascript/reference/operators/left_shift_assignment/index.md @@ -7,55 +7,42 @@ tags: - 言語機能 - 演算子 - Reference +browser-compat: javascript.operators.left_shift_assignment translation_of: Web/JavaScript/Reference/Operators/Left_shift_assignment --- {{jsSidebar("Operators")}} -左シフト代入演算子 (`<<=`) は、指定された量のビットを左に移動し、結果を変数に代入します。 +左シフト代入演算子 (`<<=`) は、指定された数だけビットを左に移動し、結果を変数に代入します。 {{EmbedInteractiveExample("pages/js/expressions-left-shift-assignment.html")}} -<div></div> - - - ## 構文 -<pre class="syntaxbox notranslate"><strong>Operator:</strong> x <<= y -<strong>Meaning:</strong> x = x << y</pre> +```js +x <<= y // x = x << y +``` ## 例 -<h3 id="左シフト代入の使用">左シフト代入の使用</h3> +### 左シフト代入の使用 -<pre class="brush: js notranslate">let a = 5; +```js +let a = 5; // 00000000000000000000000000000101 -bar <<= 2; // 20 -// 00000000000000000000000000010100</pre> - -<h2 id="仕様">仕様</h2> - -<table class="standard-table"> - <tbody> - <tr> - <th scope="col">仕様</th> - </tr> - <tr> - <td>{{SpecName('ESDraft', '#sec-assignment-operators', 'Assignment operators')}}</td> - </tr> - </tbody> -</table> +a <<= 2; // 20 +// 00000000000000000000000000010100 +``` -<h2 id="ブラウザー実装状況">ブラウザー実装状況</h2> +## 仕様書 +{{Specifications}} +## ブラウザーの互換性 -{{Compat("javascript.operators.left_shift_assignment")}} +{{Compat}} -<h2 id="関連項目">関連項目</h2> +## 関連情報 -<ul> - <li><a href="/ja/docs/Web/JavaScript/Guide/Expressions_and_Operators#Assignment">代入演算子</a></li> - <li><a href="/ja/docs/Web/JavaScript/Reference/Operators/Left_shift">左シフト演算子</a></li> -</ul> +- [JavaScript ガイドの代入演算子](/ja/docs/Web/JavaScript/Guide/Expressions_and_Operators#assignment) +- [左シフト演算子](/ja/docs/Web/JavaScript/Reference/Operators/Left_shift) |