Microsoft® JScript™
|= Operator
 Language Reference 
Version 1 

See Also


Description
Used to perform a bitwise OR on an expression.
Syntax
result |= expression

The |= operator syntax has these parts:

Part Description
result Any variable.
expression Any expression.

Remarks
Using this operator is exactly the same as specifying:
result = result | expression
The |= operator looks at the binary representation of the values of result and expression and does a bitwise OR operation on them. The result of this operation behaves like this:
0101    (result)
1100    (expression)
----
1101    (output)
Any time either of the expressions has a 1 in a digit, the result has a 1 in that digit. Otherwise, the result has a 0 in that digit.

For information on when a run-time error is generated by the |= operator, see the Operator Behavior table.