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Baseline
Widely available
This feature is well established and works across many devices and browser versions. Itâs been available across browsers since 2015å¹´7æ.
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let x = 3;
const y = x++;
console.log(`x:${x}, y:${y}`);
// Expected output: "x:4, y:3"
let a = 3;
const b = ++a;
console.log(`a:${a}, b:${b}`);
// Expected output: "a:4, b:4"
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js
x++
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詳細說æ
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js
let x = 3;
y = x++;
// y = 3
// x = 4
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js
let a = 2;
b = ++a;
// a = 3
// b = 3
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| Specification |
|---|
| ECMAScript® 2027 Language Specification # sec-postfix-increment-operator |