The <<=
operator performs left shift on the two operands and assigns the result to the left operand.
The <<=
operator performs left shift 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; // 00000000000000000000000000000101 a <<= 2; // 20 // 00000000000000000000000000010100 let b = 5n; b <<= 2n; // 20n
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Left_shift_assignment |
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Left_shift_assignment