ビット論理和代入 (|=)
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
ビット論理和代入演算子 (|=
) は、両方のオペランドの二進表現を使用し、それらに対してビット単位の OR 演算を実行して、結果を変数に代入します。
試してみましょう
let a = 5; // 00000000000000000000000000000101
a |= 3; // 00000000000000000000000000000011
console.log(a); // 00000000000000000000000000000111
// Expected output: 7
構文
js
x |= y; // x = x | y
例
ビット論理和代入の使用
js
let a = 5;
a |= 2; // 7
// 5: 00000000000000000000000000000101
// 2: 00000000000000000000000000000010
// -----------------------------------
// 7: 00000000000000000000000000000111
仕様書
Specification |
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ECMAScript® 2025 Language Specification # sec-assignment-operators |
ブラウザーの互換性
Report problems with this compatibility data on GitHubdesktop | mobile | server | ||||||||||||
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Bitwise OR assignment ( x |= y ) |
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- Full support
- Full support
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