Division assignment (/=)
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.
The division assignment (/=) operator performs division on the two operands and assigns the result to the left operand.
Try it
let a = 3; a /= 2; console.log(a); // Expected output: 1.5 a /= 0; console.log(a); // Expected output: Infinity a /= "hello"; console.log(a); // Expected output: NaN Syntax
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x /= y Description
x /= y is equivalent to x = x / y, except that the expression x is only evaluated once.
Examples
Division assignment using numbers
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let bar = 5; bar /= 2; // 2.5 bar /= 2; // 1.25 bar /= 0; // Infinity Other non-BigInt values are coerced to numbers:
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let bar = 5; bar /= "2"; // 2.5 bar /= "foo"; // NaN Division assignment using BigInts
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let foo = 3n; foo /= 2n; // 1n foo /= 2n; // 0n foo /= 0n; // RangeError: BigInt division by zero foo /= 1; // TypeError: Cannot mix BigInt and other types, use explicit conversions Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-assignment-operators |
