Remainder assignment (%=)

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


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


Using remainder assignment

// Assuming the following variable
//  bar = 5

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


ECMAScript (ECMA-262)
The definition of 'Assignment operators' in that specification.

Browser compatibility

ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
Remainder assignment (x %= y)Chrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100


Full support
Full support

See also