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ArrayBuffer.isView() - JavaScript | MDN
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ArrayBuffer.isView()
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.
ArrayBuffer.isView()
メソッドは、渡された値が ArrayBuffer
のビューのうちの一つ、例えば型付き配列オブジェクトや DataView
であるかどうかを判断します。
試してみましょう
// Create an ArrayBuffer with a size in bytes
const buffer = new ArrayBuffer(16);
console.log(ArrayBuffer.isView(new Int32Array()));
// Expected output: true
構文
js
ArrayBuffer.isView(value)
引数
value
-
チェックする値です。
返値
渡された引数が ArrayBuffer
のビューのうちの一つであれば true
を、そうでなければ false
を返します。
例
>isView の使用
js
ArrayBuffer.isView(); // false
ArrayBuffer.isView([]); // false
ArrayBuffer.isView({}); // false
ArrayBuffer.isView(null); // false
ArrayBuffer.isView(undefined); // false
ArrayBuffer.isView(new ArrayBuffer(10)); // false
ArrayBuffer.isView(new Uint8Array()); // true
ArrayBuffer.isView(new Float32Array()); // true
ArrayBuffer.isView(new Int8Array(10).subarray(0, 3)); // true
const buffer = new ArrayBuffer(2);
const dv = new DataView(buffer);
ArrayBuffer.isView(dv); // true
仕様書
Specification |
---|
ECMAScript® 2026 Language Specification> # sec-arraybuffer.isview> |
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