回答編集履歴
2
修正
test
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@@ -1,4 +1,4 @@
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ECMAScript6で
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ECMAScript6で追加された[スプレッド演算子](https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Operators/Spread_operator)というものではないかと思いますが、いかがでしょうか？
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2
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3
3
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```HTML
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4
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1
追記
test
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@@ -1 +1,49 @@
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1
1
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ECMAScript6でつかされた[スプレッド演算子](https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Operators/Spread_operator)というものではないかと思いますが、いかがでしょうか？
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2
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3
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```HTML
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4
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5
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<!DOCTYPE html>
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6
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7
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<html lang="ja">
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8
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9
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<head>
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<meta charset="UTF-8">
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<title>タイトル</title>
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<style type="text/css">
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* {
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margin: 0;
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padding: 0;
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}
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</style>
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</head>
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<body>
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<script>
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33
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const foo = ["B", "C"];
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34
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35
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const bar = ["A", ...foo, "D", "E"];
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36
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for (let i = 0; i < bar.length; i++) {
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console.log(bar[i]);
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40
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}
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</script>
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45
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</body>
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46
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47
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</html>
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48
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+
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49
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```
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