Bitwise OR Operator (|) (JavaScript)

Performs a bitwise OR on two expressions.


result = expression1 | expression2  


Any variable.

Any expression.

Any expression.


The | operator looks at the binary representation of the values of two expressions and does a bitwise OR operation on them. The result of this operation behaves as follows:

0101   (expression1)  
1100   (expression2)  
1101   (result)  

Any time either of the expressions has a 1 in a digit, the result will have a 1 in that digit. Otherwise, the result will have a 0 in that digit.


Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards, Internet Explorer 11 standards. Also supported in Store apps (Windows 8 and Windows Phone 8.1). See Version Information.

See Also

Bitwise OR Assignment Operator (|=)
Operator Precedence
Operator Summary (JavaScript)