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DataView.prototype.buffer - JavaScript | MDN
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DataView.prototype.buffer
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.
buffer アクセサープロパティは、この DataView の構築時に参照された ArrayBuffer または SharedArrayBuffer を表します。
試してみましょう
// Create an ArrayBuffer
const buffer = new ArrayBuffer(123);
// Create a view
const view = new DataView(buffer);
console.log(view.buffer.byteLength);
// Expected output: 123
解説
buffer プロパティは、設定アクセサー関数が undefined である、すなわち読み取りのみができるアクセサープロパティです。この値は DataView が構築されたときに確立され、変更することができません。
例
buffer プロパティの使用
js
var buffer = new ArrayBuffer(8);
var dataview = new DataView(buffer);
dataview.buffer; // ArrayBuffer { byteLength: 8 }
仕様書
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-get-dataview.prototype.buffer |
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