Last Updated : 23 Jul, 2025
The Bitwise OR Assignment Operator in JavaScript is represented by (|=). This operator is used to perform a bitwise OR operation on both operands and assign the result to the left operands.
Syntax:
a |= b
Where -
Example 1: In this example, we will use basic numeric values to perform Bitwise OR Assignment Operation.
JavaScript
let a = 2; // Binary presentation of 10
let b = 3; // Binary presentation of 11
let c = a |= b
console.log(c);
Output: In this example, the Binary representation of 2 is 10 and the binary representation of 3 is 11. By applying the OR assignment (|=) operation, 3 is returned as the result.
3 // Bit presentation 11
Example 2: In this example, we will use bitwise OR assignment operation to combine the bit values of both numbers.
JavaScript
let x = 10; // Binary presentation 1010
let y = 12; // Binary presentation 1100
console.log(x|=y);
Output: A bit representation of 10 is 1010 and 12 is represented as 1100. by performing OR Assignment(|=) 1110 is returned which contains all the bits of both numbers and returns 14.
14 // Bit presentation 1110
We have a complete list of Javascript Assignment Operators, to go through those please check the Javascript Assignment Operator article.
Supported Browsers:
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HTML:
3.2
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UTF-8
| Version:
0.7.4