The left shift assignment operator (<<=
) moves the specified amount of bits to the left and assigns the result to the variable.
The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.
Syntax
Operator: x <<= y Meaning: x = x << y
Examples
Using left shift assignment
let a = 5; // 00000000000000000000000000000101 bar <<= 2; // 20 // 00000000000000000000000000010100
Specifications
Specification |
---|
ECMAScript (ECMA-262) The definition of 'Assignment operators' in that specification. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Left shift assignment (x <<= y ) | Chrome Full support 1 | Edge Full support 12 | Firefox Full support 1 | IE Full support 3 | Opera Full support 3 | Safari Full support 1 | WebView Android Full support 1 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android Full support 10.1 | Safari iOS Full support 1 | Samsung Internet Android Full support 1.0 | nodejs Full support 0.1.100 |
Legend
- Full support
- Full support