The |=
operator performs bitwise OR on the two operands and assigns the result to the left operand.
The |=
operator performs bitwise OR on the two operands and assigns the result to the left operand.
x |= y
x |= y
is equivalent to x = x | y
, except that the expression x
is only evaluated once.
let a = 5; a |= 2; // 7 // 5: 00000000000000000000000000000101 // 2: 00000000000000000000000000000010 // ----------------------------------- // 7: 00000000000000000000000000000111 let b = 5n; b |= 2n; // 7n
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Bitwise_OR_assignment