The bitwise AND assignment (&=) operator performs bitwise AND on the two operands and assigns the result to the left operand.
Syntax
x &= y
Description
x &= y is equivalent to x = x & y, except that the expression x is only evaluated once.
Examples
Using bitwise AND assignment
let a = 5;
// 5: 00000000000000000000000000000101
// 2: 00000000000000000000000000000010
a &= 2; // 0
let b = 5n;
b &= 2n; // 0n