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Remainder assignment

The remainder assignment operator (%=) divides a variable by the value of the right operand and assigns the remainder to the variable.

Syntax

Operator: x %= y 
Meaning:  x  = x % y

Examples

Using remainder assignment

// Assuming the following variable
//  bar = 5

bar %= 2     // 1
bar %= 'foo' // NaN
bar %= 0     // NaN

Specifications

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Remainder assignment (x %= y) 1 12 1 3 3 1
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
Remainder assignment (x %= y) 1 18 4 10.1 1 1.0
Server
Node.js
Remainder assignment (x %= y) 0.1.100

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://wiki.developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Remainder_assignment