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DataView.prototype.setInt8() - JavaScript | MDN
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DataView.prototype.setInt8()
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2015年7月.
setInt8() メソッドは、符号付き 8 ビット整数 (byte) 値を DataView の指定されたバイト単位のオフセットの位置に格納します。
試してみましょう
// Create an ArrayBuffer with a size in bytes
const buffer = new ArrayBuffer(16);
const view = new DataView(buffer);
view.setInt8(1, 127); // Max signed 8-bit integer
console.log(view.getInt8(1));
// Expected output: 127
構文
dataview.setInt8(byteOffset, value)
引数
byteOffset-
ビューの先頭からのバイト単位のオフセットで、データを格納する位置です。
value-
設定する値です。
返値
発生するエラー
RangeError-
byteOffsetがビューの末尾を超えて格納するように設定されている場合に発生します。
例
setInt8 メソッドの使用
js
var buffer = new ArrayBuffer(8);
var dataview = new DataView(buffer);
dataview.setInt8(1, 3);
dataview.getInt8(1); // 3
仕様書
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-dataview.prototype.setint8 |
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